#java##stream##match#
条件比配
视频讲解:https://www.bilibili.com/video/av77403655/
EmployeeTestCase.java
package com.example.demo; import lombok.Data; import lombok.ToString; import lombok.extern.log4j.Log4j2; import org.junit.Test; import java.util.Collection; import java.util.Comparator; import java.util.List; import java.util.stream.Collectors; import java.util.stream.LongStream; import java.util.stream.Stream; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; @Log4j2 public class EmployeeTestCase extends BaseTest{ @Test public void match() { //列表中所有元素都比配我们的条件 boolean isAllMatch = list.stream().allMatch(e -> e.getSalary() >=1000); assertTrue(isAllMatch); //列表中任一元素比配我们的条件 boolean isManyMatch = list.stream().anyMatch(e -> e.getSalary() ==1500); assertTrue(isManyMatch); //列表中没有一个元素比配我们的条件 boolean isNoneMatch2 = list.stream().noneMatch(e -> e.getSalary() > 3000); assertTrue(isNoneMatch2); } }
BaseTest.java
package com.example.demo; import java.util.Arrays; import java.util.List; public class BaseTest { protected static final List<Employee> list = Arrays.asList( new Employee(1, "Alex", 1000), new Employee(2, "Michael", 2000), new Employee(3, "Jack", 1500), new Employee(4, "Owen", 1500), new Employee(5, "Denny", 2000)); protected static final List<List<Employee>> listFlat = Arrays.asList( Arrays.asList(new Employee(1, "Alex", 1000), new Employee(2, "Michael", 2000)), Arrays.asList(new Employee(3, "Jack", 1500), new Employee(4, "Owen", 1500)), Arrays.asList(new Employee(5, "Denny", 2000))); }
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