生產者消費問題：管程法

生產者消費問題：管程法

package Thread_demo14;
//测试：生产者消费模型--》利用缓冲区解决：管程法
public class TestPC {
    public static void main(String[] args) {
        SynContainer container = new SynContainer();
        new Productor(container).start();
        new Consumer(container).start();
    }
}
//生产者
class Productor extends Thread{
    SynContainer container;
    public  Productor(SynContainer container){
        this.container = container;
    }

    @Override
    public void run() {
        for (int i = 1; i < 100; i++) {
            container.push(new Chicken(i));
            System.out.println("生产了第"+i+"只鸡");

        }
    }
}
//消费者
class Consumer extends Thread{
    SynContainer container;
    public Consumer(SynContainer container){
        this.container = container;
    }

    @Override
    public void run() {
        for (int i = 1; i < 100; i++) {
            System.out.println("消费了----》第"+container.pop().id+"只鸡");
        }
    }
}
//产品
class Chicken{
    int id;//产品id
    public Chicken(int id){
        this.id = id;
    }

}
//缓冲区
class SynContainer{
//    容器大小
    Chicken[] chickens = new Chicken[10];
//    容器计数器
    int count = 0;

//    生产者放入产品
    public synchronized  void push(Chicken chicken){
//        如果容器满了，就需要等待生产者消费
        if (count == chickens.length){
            try{
                this.wait();
            }catch (InterruptedException e){
                e.printStackTrace();
            }
        }
        //    如果没有满，需要放入产品
        chickens[count]=chicken;
        count++;
//        通知消费者消费
        this.notify();
    }
    public synchronized Chicken pop(){
//       判断能否消费
        if (count==0){
//            消费者等待
            try{
                this.wait();
            }catch (InterruptedException e){
                e.printStackTrace();
            }
        }
//        如果可以消费
        count--;
        Chicken chicken = chickens[count];
//        吃完了，通知生产者生产
        this.notify();
        return chicken;

    }
}

信号灯法

package Thread_demo14;

public class TestPC2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//生產者--》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("快乐大本营播放中");
                } 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，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) throws InterruptedException {
        if (!flag){
            this.wait();
        }
        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() throws InterruptedException {
        if (flag){
            this.wait();
        }
        System.out.println("观看了："+voice);
        this.notifyAll();
        this.flag = !this.flag;
    }
}