自动装箱和自动拆箱

package com.isoftstone.iics.bizsupport.epartner.fh;

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

import org.junit.Test;
import org.omg.CORBA.IntHolder;

public class IntegerTest {
    
    /**
     * boolean char byte<=127 short int 介于-127--128会被包装到固定的对象中
     * 
     * 装箱和拆箱是编译器认可的，虚拟机只是执行字节码
     * <p>Title: test</p>
     * <p>Description: TODO</p>
     * @author 冯浩  2017年4月12日 上午8:15:36
     */
    @Test
    public void test(){
        List<Integer> list=new ArrayList<Integer>();
        list.add(1);
//        list.add(Integer.valueOf(1));
        
        int q = list.get(0);
        int intValue = list.get(0).intValue();
        
        Integer a=100;
        Integer b=100;
        if(a==b){
            System.out.println("a==b");
        }
//        IntHolder a=5;
        Integer a1=1000;
        Integer b1=1000;
        if(a1==b1){
            System.out.println("a1==b1");
        }
    }
    
    @Test
    public void test2(){
        int a=1;
        IntHolder b=new IntHolder(a);
        this.add(b);
        System.out.println(b.value);
        
    }
    
    public void add(IntHolder a){
        a.value+=1;
    }

}

枚举类测试

package com.isoftstone.iics.bizsupport.epartner.fh;

/**
 * 
 * <P>Description: TODO枚举类测试</P>
 * @ClassName: EnumTest
 * @author 冯浩  2017年4月12日 上午8:38:37
 * @see TODO
 */
public class EnumTest {
    
    public static void main(String[] args) {
        Model value = Enum.valueOf(Model.class, "MW");
        String name = value.getName();
        System.out.println(name);
        
    }

}

  enum Model{
      
      MW("1","梦网"),MD("2","漫道"),ALIYUN("3","阿里云");
      private String index;
      private String name;
    public String getIndex() {
        return index;
    }
    public void setIndex(String index) {
        this.index = index;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    private Model(String index, String name) {
        this.index = index;
        this.name = name;
    }
      
    
}