- 定义接口
package com.zjxnjz.mall.admin.test;public interface CallBack {void handler(String message);}
- 测试
package com.zjxnjz.mall.admin.test;public class TestCallBack {public static void setHello(CallBack callback) {int count=0;while(count<=100) {count++;}callback.handler("执行结束了");}public static void main(String[] args) {setHello(new CallBack() {@Overridepublic void handler(String message) {System.out.println(message);}});}}
