1.概述

由于上一个文章《Java OOD 线程》中的线程是父类主动监听childe，比较耗资源，现改进为childe类醒来后主动联系父类

2.代码

Test.java

class Child implements Runnable {		private Dad dad;		public Child(Dad dad) {		this.dad = dad;	}	public void wakeUp(){		dad.feed(this);	}	@Override	public void run() {		try {			Thread.sleep(3000);		} catch (Exception e) {			e.printStackTrace();		}		wakeUp();	}}class Dad {	void feed(Child c) {		System.out.println("feed child");	}	}public class Test {	public static void main(String[] args) {		Dad d = new Dad();		Child c = new Child(d);		new Thread(c).start();	}}

　　

3.运行结果