信号灯法

package gaoji;
//测试生产者消费者问题，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){
                try {
                    this.tv.play("快乐大本营");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            else{
                try {
                    this.tv.play("抖音：记录美好生活");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

//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++) {
            try {
                tv.watch();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
//产品-->节目
class TV{
    //演员表演的时候，观众等待  T
    //观众观看，演员等待   F
    String voice;//表演节目
    boolean flag = true;

    //表演
    public synchronized void play(String voice) throws InterruptedException {
        if (!flag)
            this.wait();
        System.out.println("演员表演了:"+voice);
        //通知观众观看
        this.notifyAll();
        this.voice = voice;
        this.flag = !this.flag;
    }

    //观看
    public synchronized void watch() throws InterruptedException {
        if (flag) this.wait();
        System.out.println("观看了："+voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }

}