• 多线程生产者消费者问题


    生产者消费者模型-->利用缓冲区解决: 管程法

    package Thread;
    
    /**
     * @author 85726
     * 测试,生产者消费者模型-->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;
        }
        //生产
        @Override
        public void run() {
            for (int i = 0; i < 100; i++) {
                container.push(new Chicken(i));
                System.out.println("生产了" + i + "只鸡");
            }
        }
    }
    //消费者
    class Consumer extends Thread{
        SynContainer container;
        public Consumer(SynContainer container) {
            this.container=container;
        }
        //消费
        @Override
        public void run() {
            for (int i = 0; i < 100; i++) {
                System.out.println("消费了-->"+container.pop().id+"只鸡");
            }
        }
    }
    //产品
    class Chicken{
        int id;
        public Chicken(int id) {
            this.id=id;
        }
    }
    
    //缓冲区
    class SynContainer{
        //需要一个容器大小
        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,就需要等待消费者消费
            if (count == chickens.length) {
                //通知消费者消费,生产等待
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
    
            // 如果没有满,就需要丢入产品
            chickens[count]=chicken;
            count++;
            //可以通知消费者了。
            this.notifyAll();
    
    
        }
        //消费者消费产品
        public  synchronized Chicken pop(){
            //判断能否消费
            if (count == 0) {
                //等待生产者生产,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.notifyAll();
            return  chicken;
        }
    }

    生产者消费者模型-->信号灯法,标志位解决

     1 package Thread;
     2 
     3 import javax.net.ssl.SSLContext;
     4 
     5 //测试生产者消费者问题2:信号灯法,标志位解决
     6 public class MyLockTest {
     7     public static void main(String[] args) {
     8         TV tv=new TV();
     9         new Player(tv).start();
    10         new Watcher(tv).start();
    11 
    12     }
    13 
    14 }
    15 //生产者:演员
    16 class Player extends Thread{
    17     TV tv=new TV();
    18 
    19     public Player(TV tv) {
    20         this.tv=tv;
    21     }
    22 
    23     @Override
    24     public void run() {
    25         for (int i = 0; i < 20; i++) {
    26             if (i % 3 == 0) {
    27                 tv.play("插播广告");
    28             }else {
    29                 tv.play("战狼播放中");
    30             }
    31 
    32         }
    33     }
    34 }
    35 //消费者:观众
    36 class  Watcher extends Thread{
    37     TV tv=new TV();
    38 
    39     public Watcher(TV tv) {
    40         this.tv=tv;
    41     }
    42 
    43     @Override
    44     public void run() {
    45         for (int i = 0; i < 20; i++) {
    46             tv.watch();
    47         }
    48     }
    49 }
    50 //产品:节目
    51 class TV{
    52     //演员演戏,观众等待 True
    53     //观众观看,演员等待 false
    54 
    55     String voice;  //表演的节目
    56     boolean flag=true;
    57 
    58     //表演
    59     public synchronized void play(String voice) {
    60         if (!flag) {
    61             try {
    62                 this.wait();
    63             } catch (InterruptedException e) {
    64                 e.printStackTrace();
    65             }
    66         }
    67         System.out.println("演员表演了" + voice);
    68         //通知观众观看
    69         this.notifyAll();
    70         this.voice=voice;
    71         this.flag=!this.flag;
    72 
    73     }
    74 
    75     //观看
    76     public synchronized void watch() {
    77         if (flag) {
    78             try {
    79                 this.wait();
    80             } catch (InterruptedException e) {
    81                 e.printStackTrace();
    82             }
    83         }
    84         System.out.println("    "+"观看了"+voice);
    85         //通知演员表演
    86         this.notifyAll();
    87         this.flag=!this.flag;
    88     }
    89 
    90 }
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  • 原文地址:https://www.cnblogs.com/dragon-lan/p/14095000.html
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