Método de patrón de consumo del productor-semáforo

Modelo de colaboración concurrente "modelo productor / consumidor" -> método de semáforo

Caso

package Thread;

//测试：生产者消费者模型--->标志位 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){
    
    
                tv.play("快乐大本营播放中"+i);
            }
            else {
    
    
                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

    //表演的节目
    String voice;
    boolean flag=true;

    //表演
     public  synchronized  void play(String voice){
    
    

         if (!flag){
    
    
             try {
    
    
                 this.wait();
             } catch (InterruptedException e) {
    
    
                 e.printStackTrace();
             }
         }

         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) {
    
    
                 e.printStackTrace();
             }
         }

        System.out.println("观众观看了："+voice);

         //通知演员表演
         this.notifyAll();
         this.flag=!this.flag;

    }
}