基本数据的自动拆箱与装箱及享元模式

package com.test;

public class AutoBox {
public static void main(String args[]){
Integer obj1 = 12;
System.out.println(obj1+13);

Integer i1 = 13;
Integer i2 = 13;
System.out.println(i1==i2);

//享元模式-128~~128
Integer i3 = 129;
Integer i4 = 129;
System.out.println(i3==i4);
}

}