信号灯法

信号灯法

package com.guo.gaoji;

//测试生产者消费者模型-->利用标志位解决：信号灯法
public class TestPC2 {
    public static void main(String[] args) {
        TV tv =new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}


//生产者-->演员
class Player extends Thread{
    TV tv;
    public Player(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i%2==0){
                this.tv.play("快乐大本营播放中"+i);
            }else {
                this.tv.play("抖音，记录美好生活"+i);
            }
        }
    }
}
//消费者-->观众
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i <20 ; i++) {
            tv.watch();
        }
    }
}
//产品-->节目
class TV {
    //演员表演，观众等待  T
    //观众观看，演员等待  F
    String voice;//表演的节目
    boolean flag = true;

    //表演
    public synchronized void play(String voice){
        if (!flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        System.out.println("演员表演了-->"+voice);
        //通知观众观看
        this.notifyAll();//通知唤醒
        this.voice = voice;
        this.flag = !this.flag;

    }
    //观看
    public synchronized void watch(){
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        System.out.println("观众观看了-->"+voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }

}