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java中自动装箱的问题
阅读量:427 次
发布时间:2019-03-06

本文共 499 字,大约阅读时间需要 1 分钟。

package wrapper;public class WrapperDemo {    public static void main(String[] args) {        Integer a=new Integer(5);        Integer b=new Integer(5);        System.out.println(a==b);        System.out.println(a.equals(b));        /*           false           true        */        Integer c=127;//属于自动装箱        Integer d=127;//jdk1.5以后,如果装箱的是一个字节,那么该数据会被共享,不会被重新开辟空间        System.out.println(c==d);        System.out.println(c.equals(d));        /*           true           true         */    }}

 

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