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Java从入门到实战之（31）Java 1.8新特性之总结

1、Lambda 表达式

Lambda 表达式，也可称为闭包，它是推动 Java 8 发布的最重要新特性。

Lambda 允许把函数作为一个方法的参数（函数作为参数传递进方法中）。

使用 Lambda 表达式可以使代码变的更加简洁紧凑。

语法

lambda 表达式的语法格式如下：

(parameters) -> expression
或
(parameters) ->{ statements; }

以下是lambda表达式的重要特征:

可选类型声明：不需要声明参数类型，编译器可以统一识别参数值。
可选的参数圆括号：一个参数无需定义圆括号，但多个参数需要定义圆括号。
可选的大括号：如果主体包含了一个语句，就不需要使用大括号。
可选的返回关键字：如果主体只有一个表达式返回值则编译器会自动返回值，大括号需要指定明表达式返回了一个数值。

例子：

// 1. 不需要参数,返回值为 5  
() -> 5  
  
// 2. 接收一个参数(数字类型),返回其2倍的值  
x -> 2 * x  
  
// 3. 接受2个参数(数字),并返回他们的差值  
(x, y) -> x – y  
  
// 4. 接收2个int型整数,返回他们的和  
(int x, int y) -> x + y  
  
// 5. 接受一个 string 对象,并在控制台打印,不返回任何值(看起来像是返回void)  
(String s) -> System.out.print(s)

1、例①

package Practice;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    /**
    * @Description: 
    * @Param: 
    * @return: 
    * @Author: BigData
    * @Date: 2020/11/11
    */
    interface MathOperation {
        int operation(int a, int b);
    }
    /**
    * @Description:
    * @Param:
    * @return:
    * @Author: BigData
    * @Date: 2020/11/11
    */
    interface GreetingService {
        void sayMessage(String message);
    }
    /**
    * @Description:
    * @Param: [a, b, mathOperation]
    * @return: int
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private int operate(int a, int b, MathOperation mathOperation){
        return mathOperation.operation(a, b);
    }
    public interface Converter<T1, T2> {
        void convert(int i);
    }
    public static void main(String[] args) {
        Test2 test2=new Test2();
        /**
        * @Description: 类型声明实现加法运算
        * @Param: [args]
        * @return: void
        * @Author: BigData
        * @Date: 2020/11/11
        */
        MathOperation add=(int a,int b)->a+b;
        /**
        * @Description: 没有类型声明的减法运算
        * @Param: [args]
        * @return: void
        * @Author: BigData
        * @Date: 2020/11/11
        */
        MathOperation sub=(int a,int b)->a-b;
        /**
        * @Description: 大括号中的返回语句的乘法运算
        * @Param: [args]
        * @return: void
        * @Author: BigData
        * @Date: 2020/11/11
        */
        MathOperation mul=(int a,int b)->{return a*b;};
        /**
        * @Description: 没有大括号及返回语句的除法运算
        * @Param: [args]
        * @return: void
        * @Author: BigData
        * @Date: 2020/11/11
        */
        MathOperation div=(int a,int b)->a/b;
        int a=100;
        int b=10;
        System.out.println(a+"+"+b+"="+test2.operate(a, b, add));
        System.out.println(a+"-"+b+"="+test2.operate(a, b, sub));
        System.out.println(a+"*"+b+"="+test2.operate(a, b, mul));
        System.out.println(a+"/"+b+"="+test2.operate(a, b, div));
        final int num = 1;
        Converter<Integer, String> s = (param) -> System.out.println(String.valueOf(param + num));
        s.convert(2);  // 输出结果为 3
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=57285:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
100+10=110
100-10=90
100*10=1000
100/10=10
3

Process finished with exit code 0

2、方法引用

方法引用通过方法的名字来指向一个方法。

方法引用可以使语言的构造更紧凑简洁，减少冗余代码。

方法引用使用一对冒号 :: 。

package Practice;

import java.util.ArrayList;
import java.util.List;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        show();
    }
    /**
    * @Description: 方法引用
    * @Param: []
    * @return: void
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static void show()
    { List<String> names=new ArrayList<String>();
     names.add("1");
     names.add("2");
     names.forEach(System.out::println);
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=57388:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
2

Process finished with exit code 0

3、函数式接口

函数式接口(Functional Interface)就是一个有且仅有一个抽象方法，但是可以有多个非抽象方法的接口。

函数式接口可以被隐式转换为 lambda 表达式。

Lambda 表达式和方法引用（实际上也可认为是Lambda表达式）上。

如定义了一个函数式接口如下：

@FunctionalInterface
interface GreetingService 
{
    void sayMessage(String message);
}

那么就可以使用Lambda表达式来表示该接口的一个实现(注：JAVA 8 之前一般是用匿名类实现的)：

GreetingService greetService1 = message -> System.out.println("Hello " + message);

函数式接口可以对现有的函数友好地支持 lambda。

JDK 1.8 之前已有的函数式接口:

java.lang.Runnable
java.util.concurrent.Callable
java.security.PrivilegedAction
java.util.Comparator
java.io.FileFilter
java.nio.file.PathMatcher
java.lang.reflect.InvocationHandler
java.beans.PropertyChangeListener
java.awt.event.ActionListener
javax.swing.event.ChangeListener

JDK 1.8 新增加的函数接口：

java.util.function

java.util.function 它包含了很多类，用来支持 Java的函数式编程，该包中的函数式接口有：

序号	接口 & 描述
1	BiConsumer<T,U> 代表了一个接受两个输入参数的操作，并且不返回任何结果
2	BiFunction<T,U,R> 代表了一个接受两个输入参数的方法，并且返回一个结果
3	BinaryOperator<T> 代表了一个作用于于两个同类型操作符的操作，并且返回了操作符同类型的结果
4	BiPredicate<T,U> 代表了一个两个参数的boolean值方法
5	BooleanSupplier 代表了boolean值结果的提供方
6	Consumer<T> 代表了接受一个输入参数并且无返回的操作
7	DoubleBinaryOperator 代表了作用于两个double值操作符的操作，并且返回了一个double值的结果。
8	DoubleConsumer 代表一个接受double值参数的操作，并且不返回结果。
9	DoubleFunction<R> 代表接受一个double值参数的方法，并且返回结果
10	DoublePredicate 代表一个拥有double值参数的boolean值方法
11	DoubleSupplier 代表一个double值结构的提供方
12	DoubleToIntFunction 接受一个double类型输入，返回一个int类型结果。
13	DoubleToLongFunction 接受一个double类型输入，返回一个long类型结果
14	DoubleUnaryOperator 接受一个参数同为类型double,返回值类型也为double 。
15	Function<T,R> 接受一个输入参数，返回一个结果。
16	IntBinaryOperator 接受两个参数同为类型int,返回值类型也为int 。
17	IntConsumer 接受一个int类型的输入参数，无返回值。
18	IntFunction<R> 接受一个int类型输入参数，返回一个结果。
19	IntPredicate ：接受一个int输入参数，返回一个布尔值的结果。
20	IntSupplier 无参数，返回一个int类型结果。
21	IntToDoubleFunction 接受一个int类型输入，返回一个double类型结果。
22	IntToLongFunction 接受一个int类型输入，返回一个long类型结果。
23	IntUnaryOperator 接受一个参数同为类型int,返回值类型也为int 。
24	LongBinaryOperator 接受两个参数同为类型long,返回值类型也为long。
25	LongConsumer 接受一个long类型的输入参数，无返回值。
26	LongFunction<R> 接受一个long类型输入参数，返回一个结果。
27	LongPredicate R接受一个long输入参数，返回一个布尔值类型结果。
28	LongSupplier 无参数，返回一个结果long类型的值。
29	LongToDoubleFunction 接受一个long类型输入，返回一个double类型结果。
30	LongToIntFunction 接受一个long类型输入，返回一个int类型结果。
31	LongUnaryOperator 接受一个参数同为类型long,返回值类型也为long。
32	ObjDoubleConsumer<T> 接受一个object类型和一个double类型的输入参数，无返回值。
33	ObjIntConsumer<T> 接受一个object类型和一个int类型的输入参数，无返回值。
34	ObjLongConsumer<T> 接受一个object类型和一个long类型的输入参数，无返回值。
35	Predicate<T> 接受一个输入参数，返回一个布尔值结果。
36	Supplier<T> 无参数，返回一个结果。
37	ToDoubleBiFunction<T,U> 接受两个输入参数，返回一个double类型结果
38	ToDoubleFunction<T> 接受一个输入参数，返回一个double类型结果
39	ToIntBiFunction<T,U> 接受两个输入参数，返回一个int类型结果。
40	ToIntFunction<T> 接受一个输入参数，返回一个int类型结果。
41	ToLongBiFunction<T,U> 接受两个输入参数，返回一个long类型结果。
42	ToLongFunction<T> 接受一个输入参数，返回一个long类型结果。
43	UnaryOperator<T> 接受一个参数为类型T,返回值类型也为T。

1、函数式接口实例

Predicate <T> 接口是一个函数式接口，它接受一个输入参数 T，返回一个布尔值结果。

该接口包含多种默认方法来将Predicate组合成其他复杂的逻辑（比如：与，或，非）。

该接口用于测试对象是 true 或 false。

我们可以通过以下实例（Java8Tester.java）来了解函数式接口 Predicate <T> 的使用：

import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;
 
public class Java8Tester {
   public static void main(String args[]){
      List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9);
        
      // Predicate<Integer> predicate = n -> true
      // n 是一个参数传递到 Predicate 接口的 test 方法
      // n 如果存在则 test 方法返回 true
        
      System.out.println("输出所有数据:");
        
      // 传递参数 n
      eval(list, n->true);
        
      // Predicate<Integer> predicate1 = n -> n%2 == 0
      // n 是一个参数传递到 Predicate 接口的 test 方法
      // 如果 n%2 为 0 test 方法返回 true
        
      System.out.println("输出所有偶数:");
      eval(list, n-> n%2 == 0 );
        
      // Predicate<Integer> predicate2 = n -> n > 3
      // n 是一个参数传递到 Predicate 接口的 test 方法
      // 如果 n 大于 3 test 方法返回 true
        
      System.out.println("输出大于 3 的所有数字:");
      eval(list, n-> n > 3 );
   }
    
   public static void eval(List<Integer> list, Predicate<Integer> predicate) {
      for(Integer n: list) {
        
         if(predicate.test(n)) {
            System.out.println(n + " ");
         }
      }
   }
}

结果：

$ javac Java8Tester.java 
$ java Java8Tester
输出所有数据:
1 
2 
3 
4 
5 
6 
7 
8 
9 
输出所有偶数:
2 
4 
6 
8 
输出大于 3 的所有数字:
4 
5 
6 
7 
8 
9

2、函数式接口实例

接口	描述
BiConsumer	代表了一个接受两个输入参数的操作，并且不返回任何结果
BiFunction	代表了一个接受两个输入参数的方法，并且返回一个结果
BinaryOperator	代表了一个作用于于两个同类型操作符的操作，并且返回了操作符同类型的结果
DoubleBinaryOperator	代表了作用于两个double值操作符的操作，并且返回了一个double值的结果。
IntBinaryOperator	接受两个参数同为类型int,返回值类型也为int 。
LongBinaryOperator	接受两个参数同为类型long,返回值类型也为long。

package Practice;
import java.util.Arrays;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        addTwo(1, 2, (a, b) -> System.out.println("BiConsumer求和："+(a + b)));
        System.out.println("BiFunction求和："+getSum(1, 2, (a,b)->a+b));
        Integer[] numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
        System.out.println("BinaryOperator求和："+getSum1(Arrays.asList(numbers), 0, (a,b)->a+b));
        Double[] numbers1 = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0};
        System.out.println("DoubleBinaryOperator求和："+getSum2(Arrays.asList(numbers1),0.0,(a,b)->a+b));
        System.out.println("IntBinaryOperator求和："+getSum3(Arrays.asList(numbers), 0, (a,b)->a+b));
        Long[] numbers2 = {1l, 2l, 3l, 4l, 5l, 6l, 7l, 8l, 9l, 10l};
        System.out.println("longBinaryOperator求和："+getSum4(Arrays.asList(numbers2), 0l, (a,b)->a+b));
    }
    /**
    * @Description: 1、BiConsumer的使用
    * @Param: [a1, a2, c]
    * @return: void
    * @Author: BigData
    * @Date: 2020/11/11
    */
   private static <T> void addTwo(T a1, T a2, BiConsumer<T, T> biConsumer) {
       biConsumer.accept(a1, a2);
    }
    /**
    * @Description: 2、BiFunction的使用
    * @Param: [a, a1, biFunction]
    * @return: T
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static<T>  T getSum(T a,T a1,BiFunction<T,T,T> biFunction)
    {
        return biFunction.apply(a,a1);
    }
    /**
    * @Description: 3、binaryOperator的使用
    * @Param: [list, t1, binaryOperator]
    * @return: T
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static <T> T getSum1(List<T> list,T t1,BinaryOperator<T> binaryOperator)
    {
        T result=t1;
        for (T t:list)
        {
            result=binaryOperator.apply(result,t);
        }
        return result;
    }
    /**
    * @Description: 4、DoubleBinaryOperator的使用
    * @Param: [list, d, doubleBinaryOperator]
    * @return: java.lang.Double
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static Double getSum2(List<Double> list,Double d,DoubleBinaryOperator doubleBinaryOperator)
    {
        Double res=d;
        for(Double t:list)
        {
            res=doubleBinaryOperator.applyAsDouble(res, t);
        }
        return res;
    }
    /**
    * @Description: 5、IntBinaryOperator的使用
    * @Param: [list, d, intBinaryOperator]
    * @return: java.lang.Integer
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static Integer getSum3(List<Integer> list,Integer d,IntBinaryOperator intBinaryOperator)
    {
        Integer res=d;
        for(Integer integer:list)
        {
            res=intBinaryOperator.applyAsInt(res, integer);
        }
        return res;
    }
    /**
    * @Description: 6、LongBinaryOperator的使用
    * @Param: [list, d, longBinaryOperator]
    * @return: java.lang.Long
    * @Author: BigData
    * @Date: 2020/11/11
    */
    private static Long getSum4(List<Long> list,Long d,LongBinaryOperator longBinaryOperator)
    {
        Long res=d;
        for (Long t:list)
        {
            res=longBinaryOperator.applyAsLong(res, t);
        }
        return res;
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=59399:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
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epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
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epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
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epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
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epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
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epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
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epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
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epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
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epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
BiConsumer求和：3
BiFunction求和：3
BinaryOperator求和：55
DoubleBinaryOperator求和：55.0
IntBinaryOperator求和：55
longBinaryOperator求和：55

Process finished with exit code 0

3、函数式接口实例

java.util.function包是Java 8增加的一个新技术点"函数式接口"，此包共有43个接口。这些接口是为了使Lamdba函数表达式使用的更加简便，当然你也可以自己自定义接口来应用于Lambda函数表达式。Lambda是Java 8 的最大特点，本文对此并没有进行详解。本文还应用了Java 8的另一个特点“引用方法”(引用方法是用的冒号“::”来进行方法的调用)，有兴趣的Friends可以去上网查一下。

1、Consumer-消费者

Consumer<T>	提供一个T类型的输入参数，不返回执行结果
BiConsumer<T,U>	提供两个自定义类型的输入参数，不返回执行结果
DoubleConsumer	表示接受单个double值参数，但不返回结果的操作
IntConsumer	表示接受单个int值参数，但不返回结果的操作
LongConsumer	表示接受单个long值参数，但不返回结果的操作
ObjDoubleConsumer<T>	表示接受object值和double值，但是不返回任何操作结果
ObjIntConsumer<T>	表示接受object值和int值，但是不返回任何操作结果
ObjLongConsumer<T>	表示接受object值和long值，但是不返回任何操作结果

1、Consumer<T>

提供一个T类型的输入参数，不返回执行结果

void accept(T t)	对给定的参数执行操作
default Consumer<T> andThen(Consumer<? super T> after)	返回一个组合函数，after将会在该函数执行之后应用

①、accept(T t)

package Practice;

import java.util.function.Consumer;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.Consumer示例
        StringBuilder sb = new StringBuilder("Hello ");
        Consumer<StringBuilder> consumer=(s)->s.append("Jack");
        consumer.accept(sb);
        System.out.println(sb.toString());
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=62596:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
Hello Jack

Process finished with exit code 0

②、andThen(Consumer<? super T> after)

package Practice;

import java.util.function.Consumer;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.Consumer示例
        StringBuilder sb = new StringBuilder("Hello ");
        Consumer<StringBuilder> consumer=(s)->s.append("Jack");
        consumer.accept(sb);
        System.out.println(sb.toString());
        Consumer<StringBuilder> consumer1=(s)->s.append(" March");
        consumer.andThen(consumer1).accept(sb);
        System.out.println(sb.toString());
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=63134:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
Hello Jack
Hello JackJack March

Process finished with exit code 0

注意：accept(T t)和andThen(Consumer<? super T> after)的区别是：前者接受泛型参数，后者接受消费接口参数

2、BiConsumer<T,U>

提供两个自定义类型的输入参数，不返回执行结果

void accept(T t, U u)	对给定的参数执行操作
default BiConsumer<T,U> andThen(BiConsumer<? super T,? super U> after)	返回一个组合函数，after将会在该函数执行之后应用

①、accept(T t, U u)

package Practice;

import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.BiConsumer使用
        StringBuilder sb = new StringBuilder();
        BiConsumer<String,String> biConsumer=(a,b)->{
           sb.append(a);
           sb.append(b);
        };
        biConsumer.accept("hello", "jack");
        System.out.println(sb.toString());
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=63367:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
hellojack

Process finished with exit code 0

②、andThen(BiConsumer<? super T,? super U> after)

package Practice;

import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.BiConsumer使用
        StringBuilder sb = new StringBuilder();
        BiConsumer<String,String> biConsumer=(a,b)->{
           sb.append(a);
           sb.append(b);
        };
        biConsumer.accept("hello", "jack");
        System.out.println(sb.toString());
        BiConsumer<String,String> biConsumer1=(a,b)->
        {
            System.out.println(a+b);
        };
        biConsumer.andThen(biConsumer1).accept("Hello", "Jack");
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=63379:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
hellojack
HelloJack

Process finished with exit code 0

3、DoubleConsumer

表示接受单个double值参数，但不返回结果的操作

void accept(double value)	对给定的参数执行操作
default DoubleConsumer andThen(DoubleConsumer after)	返回一个组合函数，after在该函数执行之后应用

①、accept(double value)

package Practice;

import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.DoubleConsumer使用
        DoubleConsumer doubleConsumer=System.out::println;
        doubleConsumer.accept(1.3);
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=63828:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1.3

Process finished with exit code 0

②、andThen(DoubleConsumer after)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        double d=scanner.nextDouble();
        //1.DoubleConsumer使用
        DoubleConsumer doubleConsumer=System.out::println;
       DoubleConsumer doubleConsumer1=(a)->
       {
           if(a>100.0)
           {
               System.out.println();
           }
           else
           {
               System.out.println("输入错误！");
           }
       };
       doubleConsumer.andThen(doubleConsumer1).accept(d);
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=64503:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
1.0
输入错误！

Process finished with exit code 0

4.ObjDoubleConsumer<T>

表示接受object值和double值，但是不返回任何操作结果

void accept(T t, double value)	对给定的参数执行操作

①、accept(T t, double value)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        //1.ObjDoubleConsumer使用
        ObjDoubleConsumer<String> doubleConsumer = (obj, daub)
                -> System.out.println(obj + daub);
        doubleConsumer.accept("金额：", d);
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=64851:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
22
金额：22.0

Process finished with exit code 0

2、Predicate-谓语

Predicate<T>	对给定的输入参数执行操作，返回一个boolean类型的结果（布尔值函数）
BiPredicate<T,U>	对给定的两个输入参数执行操作，返回一个boolean类型的结果（布尔值函数）
DoublePredicate	对给定的double参数执行操作，返回一个boolean类型的结果（布尔值函数）
IntPredicate	对给定的int输入参数执行操作，返回一个boolean类型的结果（布尔值函数）
LongPredicate	对给定的long参数执行操作，返回一个boolean类型的结果（布尔值函数）

1.Predicate<T>

对给定的输入参数执行操作，返回一个boolean类型的结果（布尔值函数）

boolean test(T t)	根据给定的参数进行判断
Predicate<T> and(Predicate<? super T> other)	返回一个组合判断，将other以短路并且的方式加入到函数的判断中
Predicate<T> or(Predicate<? super T> other)	返回一个组合判断，将other以短路或的方式加入到函数的判断中
Predicate<T> negate()	将函数的判断取反

①、test(T t)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        //1.Predicate使用
        Predicate<Double> predicate=n->n!=0;
       if( predicate.test(d)==true)
       {
           System.out.println("金额："+d);
       }
       else
       {
           System.out.println("金额输入错误！");
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=64991:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
0
金额输入错误！

Process finished with exit code 0

②、and(Predicate<? super T> other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        //1.Predicate使用
        Predicate<Double> predicate=n->n>0;
       if( predicate.and(n->n<=10).test(d)==true)
       {
           System.out.println("金额:"+d);
       }
       else
       {
           System.out.println("输入错误！");
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=65085:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
11
输入错误！

Process finished with exit code 0

③、or(Predicate<? super T> other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        //1.Predicate使用
        Predicate<Double> predicate=n->n<0;
       if( predicate.or(n->n>10).test(d)==true)
       {
           System.out.println("输入错误！");
       }
       else
       {
           System.out.println("金额:"+d);
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=50832:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
金额:1.0

Process finished with exit code 0

④、negate()

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        //1.Predicate使用
        Predicate<Double> predicate=n->n<0;
       if( predicate.negate().test(d)==false)
       {
           System.out.println("输入错误！");
       }
       else
       {
           System.out.println("金额:"+d);
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=50886:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-1
输入错误！

Process finished with exit code 0

2.BiPredicate<T,U>

对给定的两个输入参数执行操作，返回一个boolean类型的结果（布尔值函数）

boolean test(T t, U u)	根据给定的两个输入参数进行判断
BiPredicate<T,U> and(BiPredicate<? super T,? super U> other)	返回一个组合判断，将other以短路并且的方式加入到函数的判断中
BiPredicate<T,U> or(BiPredicate<? super T,? super U> other)	返回一个组合判断，将other以短路或的方式加入到函数的判断中
BiPredicate<T,U> negate()	将函数的判断取反

①、test(T t, U u)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiPredicate使用
        BiPredicate<Integer,Integer> biPredicate=(a,b)->a!=b;
       if( biPredicate.test(d,d1)==true)
       {
           System.out.println(d+"和"+d1+"是不相等的");
       }
       else
       {
           System.out.println(d+"和"+d1+"是相等的");
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51072:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
2
1和2是不相等的

Process finished with exit code 0

②、and(BiPredicate<? super T,? super U> other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiPredicate使用
        BiPredicate<Integer, Integer> biPredicate = (a, b) -> a != b;
        biPredicate=biPredicate.and((a,b)->a>=b);
       if( biPredicate.test(d,d1)==true)
       {
           System.out.println(d+"和"+d1+"是不相等的且"+d+">"+d1);
       }
       else
       {
           System.out.println(d+"和"+d1+"是不相等的且"+d+"<="+d1);
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51230:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
2
1
2和1是不相等的且2>1

Process finished with exit code 0

③、or(Predicate<? super T> other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiPredicate使用
        BiPredicate<Integer, Integer> biPredicate = (a, b) -> a != b;
        biPredicate=biPredicate.or((a,b)->a>b);
       if( biPredicate.test(d,d1)==true)
       {
           System.out.println(d+"和"+d1+"是不相等的或者"+d+">"+d1);
       }
       else
       {
           System.out.println(d+"和"+d1+"是相等的且"+d+"="+d1);
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51275:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
1
1和1是相等的且1=1

Process finished with exit code 0

④、negate()

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiPredicate使用
        BiPredicate<Integer, Integer> biPredicate = (a, b) -> a != b;
       if( biPredicate.negate().test(d,d1)==false)
       {
           System.out.println(d+"和"+d1+"是不相等的且"+d+"!="+d1);
       }
       else
       {
           System.out.println(d+"和"+d1+"是相等的且"+d+"="+d1);
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51334:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
2
1和2是不相等的且1!=2

Process finished with exit code 0

3.DoublePredicate

对给定的double参数执行操作，返回一个boolean类型的结果（布尔值函数）

boolean test(double value)	根据给定的参数进行判断
DoublePredicate and(DoublePredicate other)	返回一个组合判断，将other以短路并且的方式加入到函数的判断中
DoublePredicate or(DoublePredicate other)	返回一个组合判断，将other以短路或的方式加入到函数的判断中
default DoublePredicate negate()	将函数的判断取反

①、 test(double value)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
//        Scanner scanner1 = new Scanner(System.in);
//        Integer d1 = scanner.nextInt();
        //1.DoublePredicate使用
        DoublePredicate doublePredicate=double1->double1 >0;
        if(doublePredicate.test(d))
        {
            System.out.println("金额："+d);
        }
        else
        {
            System.out.println("输入错误！！");
        }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51922:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
2
金额：2

Process finished with exit code 0

②、 and(DoublePredicate other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
//        Scanner scanner1 = new Scanner(System.in);
//        Integer d1 = scanner.nextInt();
        //1.DoublePredicate使用
        DoublePredicate doublePredicate=double1->double1 >0;
        if(doublePredicate.and(a->a<10).test(d))
        {
            System.out.println("金额："+d);
        }
        else
        {
            System.out.println("输入错误！！");
        }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=51982:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
11
输入错误！！

Process finished with exit code 0

③、 or(DoublePredicate other)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
//        Scanner scanner1 = new Scanner(System.in);
//        Integer d1 = scanner.nextInt();
        //1.DoublePredicate使用
        DoublePredicate doublePredicate=double1->double1 <0;
        if(doublePredicate.or(a->a>10).test(d)==false)
        {
            System.out.println("金额："+d);
        }
        else
        {
            System.out.println("输入错误！！");
        }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=52020:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
9
金额：9

Process finished with exit code 0

④、 negate()

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
//        Scanner scanner1 = new Scanner(System.in);
//        Integer d1 = scanner.nextInt();
        //1.DoublePredicate使用
        DoublePredicate doublePredicate=double1->double1 <0;
        if(doublePredicate.negate().test(d))
        {
            System.out.println("金额："+d);
        }
        else
        {
            System.out.println("输入错误！！");
        }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=52053:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-1
输入错误！！

Process finished with exit code 0

3、Function-功能

Function<T,R>	接收一个参数并返回结果的函数
BiFunction<T,U,R>	接受两个参数并返回结果的函数
DoubleFunction<R>	接收一个double类型的参数并返回结果的函数
DoubleToIntFunction	接收一个double类型的参数并返回int结果的函数
DoubleToLongFunction	接收一个double类型的参数并返回long结果的函数
IntFunction<R>	接收一个int类型的参数并返回结果的函数
IntToDoubleFunction	接收一个int类型的参数并返回double结果的函数
IntToLongFunction	接收一个int类型的参数并返回long结果的函数
LongFunction<R>	接收一个long类型的参数并返回结果的函数
LongToDoubleFunction	接收一个long类型的参数并返回double结果的函数
LongToIntFunction	接收一个long类型的参数并返回int结果的函数
ToDoubleBiFunction<T,U>	接收两个参数并返回double结果的函数
ToDoubleFunction<T>	接收一个参数并返回double结果的函数
ToIntBiFunction<T,U>	接收两个参数并返回int结果的函数
ToIntFunction<T>	接收一个参数并返回int结果的函数
ToLongBiFunction<T,U>	接收两个参数并返回long结果的函数
ToLongFunction<T>	接收一个参数并返回long结果的函数

1.Function<T, R>

接收一个参数并返回结果的函数

R apply(T t)	将此参数应用到函数中
Function<T, R> andThen(Function<? super R,? extends V> after)	返回一个组合函数，该函数结果应用到after函数中
Function<T, R> compose(Function<? super V,? extends T> before)	返回一个组合函数，首先将入参应用到before函数，再将before函数结果应用到该函数中

①、 apply(T t)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String d = scanner.next();
//        Scanner scanner1 = new Scanner(System.in);
//        String d1 = scanner.next();
        //1.Function使用
        Function<String, String> function = a -> a + " Jack!";
        System.out.println(function.apply(d));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=52173:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
hello
hello Jack!

Process finished with exit code 0

②、 andThen(Function<? super R,? extends V> after)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String d = scanner.next();
        //1.Function使用
        Function<String, String> function = a -> a + " Jack!";
        function=function.andThen(b->b+" Mark!");
        System.out.println(function.apply(d));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=52270:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
hello
hello Jack! Mark!

Process finished with exit code 0

③、 compose(Function<? super V,? extends T> before)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String d = scanner.next();
        //1.Function使用
        Function<String, String> function = a -> a + " Jack!";
        function=function.compose(b->b+" Mark!");
        System.out.println(function.apply(d));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=52288:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
hello
hello Mark! Jack!

Process finished with exit code 0

2.BiFunction<T,U,R>

接受两个参数并返回结果的函数

R apply(T t, U u)	将参数应用于函数执行
BiFunction<T,U,V> andThen(Function<? super R,? extends V> after)	返回一个组合函数，after函数应用于该函数之后

①、 apply(T t)

package Practice;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiFunction使用
        BiFunction<Integer, Integer,Integer> biFunction =(a,b)->{
            return a+b;
        };
        System.out.println(biFunction.apply(d, d1));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=53012:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
10
20
30

Process finished with exit code 0

②、 andThen(Function<? super R,? extends V> after)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner.nextInt();
        //1.BiFunction使用
        /**
        * @Description: 实现输入两个数字都小于0返回错误标识
        * @Param: [args]
        * @return: void
        * @Author: BigData
        * @Date: 2020/11/13
        */
        Function<Integer, Integer> function = (a) ->
        {
            if(a>0)
            {
                return a;
            }
            else
            {
                System.out.println("输入错误！");
            }
            return -1;
        };
        BiFunction<Integer, Integer,Integer> biFunction =(a,b)->{
            return a+b;
        };
        biFunction=biFunction.andThen(function);
        System.out.println(biFunction.apply(d, d1));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=53182:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-1
-2
输入错误！
-1

Process finished with exit code 0

3.DoubleFunction<R>

接收一个double类型的参数并返回结果的函数

R apply(double value)	根据给定参数执行函数

①、apply(double value)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer d = scanner.nextInt();
        //1.DoubleFunction使用
        DoubleFunction<String> doubleFunction=(a)->{
            if (a>=0)
            {
                return "结果"+a;
            }
            else
            {
                return "输入结果错误！";
            }
        };
        System.out.println(doubleFunction.apply(d));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54121:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-1
输入结果错误！

Process finished with exit code 0

4.DoubleToIntFunction

接收一个double类型的参数并返回int结果的函数

int applyAsInt(double value)	根据给定的参数执行函数

①、applyAsInt(double value)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Double d = scanner.nextDouble();
        //1.DoubleToIntFunction使用
        DoubleToIntFunction doubleToIntFunction=d1->
        {
            if (d1>=0)
            {
                return (int) d1;
            }
            else
            {
                return -1;
            }
        };
        System.out.println(doubleToIntFunction.applyAsInt(d));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54177:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1.2
1

Process finished with exit code 0

5.ToDoubleBiFunction<T,U>

接收两个参数并返回double结果的函数

double applyAsDouble(T t, U u)	根据给定的参数执行函数

①、applyAsDouble(T t, U u)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Double d = scanner.nextDouble();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner1.nextInt();
        //1.ToDoubleBiFunction使用
        ToDoubleBiFunction<Double,Integer> toDoubleBiFunction=(dd1,i1)->
        {
          if(dd1>0&&i1>0)
          {
              return dd1+i1.doubleValue();
          }
          else
          {
              return -1.0;
          }
        };
        System.out.println(toDoubleBiFunction.applyAsDouble(d, d1));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54274:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1.2
2
3.2

Process finished with exit code 0

6.ToDoubleFunction<T>

接收一个参数并返回double结果的函数

double applyAsDouble(T value)	根据给定参数执行函数

①、applyAsDouble(T value)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
//        Scanner scanner = new Scanner(System.in);
//        Double d = scanner.nextDouble();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner1.nextInt();
        //1.ToDoubleFunction使用
        ToDoubleFunction<Integer> toDoubleBiFunction=(i1)->
        {
          if(i1>0)
          {
              return i1.doubleValue();
          }
          else
          {
              return -1.0;
          }
        };
        System.out.println(toDoubleBiFunction.applyAsDouble(d1));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54308:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
1.0

Process finished with exit code 0

4.Supplier-供应商

Supplier<T>	不提供输入参数，但是返回结果的函数
BooleanSupplier	不提供输入参数，但是返回boolean结果的函数
DoubleSupplier	不提供输入参数，但是返回double结果的函数
IntSupplier	不提供输入参数，但是返回int结果的函数
LongSupplier	不提供输入参数，但是返回long结果的函数

1.Supplier<T>

无需提供输入参数，返回一个T类型的执行结果

T get()	获取结果值

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
//        Scanner scanner = new Scanner(System.in);
//        Double d = scanner.nextDouble();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner1.nextInt();
        //1.Supplier使用
        Supplier<Integer> supplier=()->
        {
          if(d1>=0)
          {
              return d1;
          }
          else
          {
              return -1;
          }
        };
        System.out.println(supplier.get());
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54378:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-2
-1

Process finished with exit code 0

2.BooleanSupplier

不提供输入参数，但是返回boolean结果的函数

boolean getAsBoolean()	获取函数的执行结果

①、getAsBoolean()

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
//        Scanner scanner = new Scanner(System.in);
//        Double d = scanner.nextDouble();
        Scanner scanner1 = new Scanner(System.in);
        Integer d1 = scanner1.nextInt();
        //1.BooleanSupplier使用
        BooleanSupplier booleanSupplier=()->
        {
          if(d1>=0)
          {
              return true;
          }
          else
          {
              return false;
          }
        };
       if(booleanSupplier.getAsBoolean()==true)
       {
           System.out.println("结果是:"+d1);
       }
       else
       {
           System.out.println("输入错误！");
       }
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54466:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
-1
输入错误！

Process finished with exit code 0

3.DoubleSupplier

不提供输入参数，但是返回double结果的函数

double getAsDouble()	获取函数的执行结果

①、getAsDouble()

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Double d = scanner.nextDouble();
//        Scanner scanner1 = new Scanner(System.in);
//        Integer d1 = scanner1.nextInt();
        //1.DoubleSupplier 使用
        DoubleSupplier  doubleSupplier=()->
        {
          if(d>=0)
          {
              return d;
          }
          else
          {
              return -1;
          }
        };
        System.out.println(doubleSupplier.getAsDouble());;
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54512:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
1
1.0

Process finished with exit code 0

5.Operator-操作员

UnaryOperator<T>	提供单个参数，并且返回一个与输入参数类型一致的结果
BinaryOperator<T>	提供两个参数，并且返回结果与输入参数类型一致的结果
DoubleBinaryOperator	提供两个double参数并且返回double结果
DoubleUnaryOperator	提供单个double参数并且返回double结果
IntBinaryOperator	提供两个int参数并且返回int结果
IntUnaryOperator	提供单个int参数并且返回int结果
LongBinaryOperator	提供两个long参数并且返回long结果
LongUnaryOperator	提供单个long参数并且返回long结果

1.UnaryOperator<T>

对输入参数执行操作，并且输入参数与返回参数类型相同

T apply(T t)	将给定参数应用到函数中
Function<T, R> andThen(Function<? super R,? extends V> after)	返回一个组合函数，该函数结果应用到after函数中
Function<T, R> compose(Function<? super V,? extends T> before)	返回一个组合函数，首先将入参应用到before函数，再将before函数结果应用到该函数中

①、apply(T t)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.UnaryOperator
        UnaryOperator<String> unaryOperator = greet -> greet + " Bob!";
        System.out.println(unaryOperator.apply("Hello"));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54566:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
Hello Bob!

Process finished with exit code 0

②、 andThen(Function<? super R,? extends V> after)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.UnaryOperator
        UnaryOperator<String> unaryOperator = greet -> greet + " Bob!";
        UnaryOperator<String> unaryOperator1 = greet -> greet + " Jack!";
        System.out.println( unaryOperator.andThen(unaryOperator1).apply("100"));;
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54590:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
100 Bob! Jack!

Process finished with exit code 0

③、compose(Function<? super V,? extends T> before)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.UnaryOperator
        UnaryOperator<String> unaryOperator = greet -> greet + " Bob!";
        UnaryOperator<String> unaryOperator1 = greet -> greet + " Jack!";
        System.out.println( unaryOperator.compose(unaryOperator1).apply("100"));;
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54625:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
100 Jack! Bob!

Process finished with exit code 0

2.BinaryOperator<T>

提供两个参数，并且返回结果与输入参数类型一致的结果

R apply(T t, U u)	根据给定参数执行函数
BiFunction<T,U,V> andThen(Function<? super R,? extends V> after)	返回一个组合函数，after应用于该函数之后

①、apply(T t, U u)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.BinaryOperator
        BinaryOperator<Integer> binaryOperator=(a,b)->
        {
            if(a<=b)
            {
                return a+b;
            }
            else
            {
                return a-b;
            }
        };
        System.out.println(binaryOperator.apply(100, 200));
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54731:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
50

Process finished with exit code 0

②、andThen(Function<? super R,? extends V> after)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.BinaryOperator
        BinaryOperator<Integer> binaryOperator=(a,b)->
        {
            if(a<=b)
            {
                return a+b;
            }
            else
            {
                return a-b;
            }
        };

        Function<Integer, String> function = a ->
        {
            if(a==0)
            {
                return "结果错误！";
            }
            else
            {
                return a+"的结果";
            }
        };
        System.out.println(binaryOperator.andThen(function).apply(100, 100));;
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54799:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
200的结果

Process finished with exit code 0

3.DoubleBinaryOperator

提供两个double参数并且返回double结果

double applyAsDouble(double left, double right)	根据给定的参数执行函数

①、applyAsDouble(double left, double right)

package Practice;

import javafx.scene.layout.BackgroundRepeat;
import scala.tools.ant.sabbus.Break;

import java.security.cert.X509Certificate;
import java.util.Scanner;
import java.util.function.*;

/**
 * @program: FlinkUdf
 * @description: Jdk1.8新特性
 * @author: BigData
 * @create: 2020-11-11 10:40
 **/
public class Test2 {
    public static void main(String[] args) {
        //1.DoubleBinaryOperator
        DoubleBinaryOperator doubleBinaryOperator = (doub1, doub2) -> doub1
                + doub2;
        System.out.println(doubleBinaryOperator.applyAsDouble(1.1, 2.3)); 
    }
}

结果：

"C:Program FilesJavajdk1.8.0_221injava.exe" "-javaagent:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3libidea_rt.jar=54831:C:Program FilesJetBrainsIntelliJ IDEA 2019.3.3in" -Dfile.encoding=UTF-8 -classpath "C:Program FilesJavajdk1.8.0_221jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_221jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_221jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_221jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_221jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_221jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_221jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_221jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_221jrelibext
ashorn.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_221jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_221jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_221jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_221jrelibjce.jar;C:Program FilesJavajdk1.8.0_221jrelibjfr.jar;C:Program FilesJavajdk1.8.0_221jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_221jrelibjsse.jar;C:Program FilesJavajdk1.8.0_221jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_221jrelibplugin.jar;C:Program FilesJavajdk1.8.0_221jrelib
esources.jar;C:Program FilesJavajdk1.8.0_221jrelib
t.jar;C:appFlinkUdf	arget	est-classes;C:Usersdefaultuser0.m2
epositoryjunitjunit4.11junit-4.11.jar;C:Usersdefaultuser0.m2
epositoryorghamcresthamcrest-core1.3hamcrest-core-1.3.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java-bridge_2.111.11.1flink-table-api-java-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-java1.11.1flink-table-api-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-java1.11.1flink-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-runtime_2.111.11.1flink-runtime_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-queryable-state-client-java1.11.1flink-queryable-state-client-java-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-hadoop-fs1.11.1flink-hadoop-fs-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycommons-iocommons-io2.4commons-io-2.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-netty4.1.39.Final-11.0flink-shaded-netty-4.1.39.Final-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-jackson2.10.1-11.0flink-shaded-jackson-2.10.1-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-11.0flink-shaded-zookeeper-3-3.4.14-11.0.jar;C:Usersdefaultuser0.m2
epositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-actor_2.112.5.21akka-actor_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeconfig1.3.3config-1.3.3.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-java8-compat_2.11.7.0scala-java8-compat_2.11-0.7.0.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-stream_2.112.5.21akka-stream_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorg
eactivestreams
eactive-streams1.0.2
eactive-streams-1.0.2.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafessl-config-core_2.11.3.7ssl-config-core_2.11-0.3.7.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-protobuf_2.112.5.21akka-protobuf_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositorycom	ypesafeakkaakka-slf4j_2.112.5.21akka-slf4j_2.11-2.5.21.jar;C:Usersdefaultuser0.m2
epositoryorgclappergrizzled-slf4j_2.111.3.2grizzled-slf4j_2.11-1.3.2.jar;C:Usersdefaultuser0.m2
epositorycomgithubscoptscopt_2.113.5.0scopt_2.11-3.5.0.jar;C:Usersdefaultuser0.m2
epositoryorgxerialsnappysnappy-java1.1.4snappy-java-1.1.4.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill_2.11.7.6chill_2.11-0.7.6.jar;C:Usersdefaultuser0.m2
epositorycom	witterchill-java.7.6chill-java-0.7.6.jar;C:Usersdefaultuser0.m2
epositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-guava18.0-11.0flink-shaded-guava-18.0-11.0.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-java_2.111.11.1flink-streaming-java_2.11-1.11.1-tests.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;C:Usersdefaultuser0.m2
epositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkforce-shading1.11.1force-shading-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-planner-blink_2.111.11.1flink-table-planner-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala_2.111.11.1flink-table-api-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-api-scala-bridge_2.111.11.1flink-table-api-scala-bridge_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-runtime-blink_2.111.11.1flink-table-runtime-blink_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninojanino3.0.9janino-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgcodehausjaninocommons-compiler3.0.9commons-compiler-3.0.9.jar;C:Usersdefaultuser0.m2
epositoryorgapachecalciteavaticaavatica-core1.16.0avatica-core-1.16.0.jar;C:Usersdefaultuser0.m2
epositoryorg
eflections
eflections.9.10
eflections-0.9.10.jar;C:Usersdefaultuser0.m2
epositoryorgjavassistjavassist3.19.0-GAjavassist-3.19.0-GA.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-streaming-scala_2.111.11.1flink-streaming-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-scala_2.111.11.1flink-scala_2.11-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-reflect2.11.12scala-reflect-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-library2.11.12scala-library-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langscala-compiler2.11.12scala-compiler-2.11.12.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-xml_2.111.0.5scala-xml_2.11-1.0.5.jar;C:Usersdefaultuser0.m2
epositoryorgscala-langmodulesscala-parser-combinators_2.111.0.4scala-parser-combinators_2.11-1.0.4.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-table-common1.11.1flink-table-common-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-core1.11.1flink-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-annotations1.11.1flink-annotations-1.11.1.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-metrics-core1.11.1flink-metrics-core-1.11.1.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;C:Usersdefaultuser0.m2
epositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;C:Usersdefaultuser0.m2
epositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;C:Usersdefaultuser0.m2
epositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;C:Usersdefaultuser0.m2
epositoryorgapacheflinkflink-shaded-asm-77.1-11.0flink-shaded-asm-7-7.1-11.0.jar;C:Usersdefaultuser0.m2
epositorycomalibabafastjson1.2.73fastjson-1.2.73.jar;C:Usersdefaultuser0.m2
epositoryorgslf4jslf4j-log4j121.7.7slf4j-log4j12-1.7.7.jar;C:Usersdefaultuser0.m2
epositorylog4jlog4j1.2.17log4j-1.2.17.jar;C:Usersdefaultuser0.m2
epository
etsfjson-libjson-lib2.4json-lib-2.4-jdk15.jar;C:Usersdefaultuser0.m2
epositorycommons-beanutilscommons-beanutils1.8.0commons-beanutils-1.8.0.jar;C:Usersdefaultuser0.m2
epositorycommons-collectionscommons-collections3.2.1commons-collections-3.2.1.jar;C:Usersdefaultuser0.m2
epositorycommons-langcommons-lang2.5commons-lang-2.5.jar;C:Usersdefaultuser0.m2
epositorycommons-loggingcommons-logging1.1.1commons-logging-1.1.1.jar;C:Usersdefaultuser0.m2
epository
etsfezmorphezmorph1.0.6ezmorph-1.0.6.jar;C:Usersdefaultuser0.m2
epositoryorgjsonjson20180813json-20180813.jar" Practice.Test2
3.4

Process finished with exit code 0

4.DoubleUnaryOperator

提供单个double参数并且返回double结果

double applyAsDouble(double operand)	根据给定参数执行函数
DoubleUnaryOperator andThen(DoubleUnaryOperator after)	返回一个组合函数，after应用于该函数之后
DoubleUnaryOperator compose(DoubleUnaryOperator before)	返回一个组合函数，before应用于该函数之前

①、applyAsDouble(double operand)

DoubleUnaryOperator doubleUnaryOperator = doub -> doub + 2.5;
System.out.println(doubleUnaryOperator.applyAsDouble(2.6)); // 5.1

②、 andThen(DoubleUnaryOperator after)

DoubleUnaryOperator doubleUnaryOperator1 = doub -> doub * 3;
double result = doubleUnaryOperator.andThen(doubleUnaryOperator1)
    .applyAsDouble(10); 
System.out.println(result); // (10 + 2.5) * 3 = 37.5

③、 compose(DoubleUnaryOperator before)

double result = doubleUnaryOperator.compose(doubleUnaryOperator1)
    .applyAsDouble(10);
System.out.println(result); // 10 * 3 + 2.5 = 32.5

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原文地址：https://www.cnblogs.com/huanghanyu/p/13960083.html