package data;import java.util.HashMap;import java.util.Map;public class Good  {    CallBack callBack;    public void setCallBack(CallBack callBack) {        this.callBack=callBack;    }        private void doMyThing(){        System.out.println("我做我自己的事情");    }    public void doSomeThing(){        this.doMyThing();        System.out.println("做完了我的事情");        System.out.println("開始回调");        this.callBack.show();    }    public static void main(String[] args) {        Good good=new Good();        good.setCallBack(new CallBack() {            @Override            void toDo(Map
     
       map) {                map.put("people", "哈哈");                map.put("age", "100");            }        });        good.doSomeThing();    }}abstract class CallBack {    Map
      
        map = new HashMap
       
        ();        public void show() {        this.toDo(map);        map.put("type", "人类");        System.out.println(map);    }    abstract void toDo(Map
        
          map);}