包装类的equals和==

package sso;public class Test {    public static void main(String[] args) {        // TODO Auto-generated method stub        Long a=(long) 110;        Long b=(long) 110;        //自动装箱        System.out.println(a==b);//true        Long a1=new Long(120);        Long b1=new Long(120);        //比较内存地址        System.out.println(a1==b1);//false        long c=110;        long c1=120;        System.out.println(a==c);//true        System.out.println(a1==c1);//true    }}