生产者/消费者问题

1.管程法

package com.zy.demo03;

public class TestPC {
    
    public static void main(String[] args) {
    
        SynContainer synContainer = new SynContainer();
        new Productor(synContainer).start();
        new Consumer(synContainer).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++) {
    
            System.out.println("生产了第"+i+"只鸡。");
            try {
    
                container.push(new Chicken(i));
            } catch (InterruptedException e) {
    
                e.printStackTrace();
            }
        }
    }
}
//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++) {
    
            try {
    
                System.out.println("消费了第"+container.pop()+"只鸡。");
            } catch (InterruptedException e) {
    
                e.printStackTrace();
            }

        }
    }
}
//货物鸡
class Chicken{
    
    int id;//产品编号

    public Chicken(int id) {
    
        this.id = id;
    }
}
//缓冲区
class SynContainer{
    
    //创建一个容器大小
    Chicken[] chickens = new Chicken[10];
    //容器计数器
    int count = 0;
    //创建生产者放入产品
    public synchronized void push(Chicken chicken) throws InterruptedException {
    
        //如果容器满了，需要消费者来消费
        if(count == chickens.length)
        {
    
            this.wait();
        }
        //如果容器没满，需要生产者放入
        chickens[count] = chicken;
        count++;

        //有鸡了，可以通知消费者消费
        this.notifyAll();
    }

    //创建消费者消费
    public synchronized int pop() throws InterruptedException {
    
        //如果容器为空，等待
        if(count == 0)
        {
    
            this.wait();
        }
        //如果容器有鸡
        count--;
        Chicken chicken = chickens[count];


        //消费后，提醒生产者生产
        this.notifyAll();
        return chicken.id;
    }
}

2.信号灯法

package com.zy.demo03;

public class TestPC2 {
    

    public static void main(String[] args) {
    
        Tv tv = new Tv();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}
//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("电视剧");
                } catch (InterruptedException e) {
    
                    e.printStackTrace();
                }
            }else{
    
                try {
    
                    this.tv.play("广告播放中...");
                } catch (InterruptedException e) {
    
                    e.printStackTrace();
                }
            }
        }
    }
}
//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();
            }
        }
    }
}

//节目
class Tv{
    
    //演员录制，观众等待
    //观众观看，演员等待
    String vioce;//节目名
    Boolean flag = true;//信号标识

    //表演
    public synchronized void play(String vioce) throws InterruptedException {
    
        if(!flag)
        {
    
            this.wait();
        }
        System.out.println("演员表演录制了："+vioce);
        //通知观众观看
        this.notifyAll();
        //节目名变化
        this.vioce = vioce;
        //信号变化
        this.flag = !this.flag;
    }
    //观看
    public synchronized void watch() throws InterruptedException {
    
        if(flag)
        {
    
            this.wait();
        }
        System.out.println("观众们观看："+ vioce);
        //看完后通知演员录制
        this.notifyAll();
        //信号变化
        this.flag = !this.flag;
    }
}