Java 线程通信的应用：经典例题：生产者/消费者问题

  1 package bytezero.threadcommunication;
  2
  3 /**
  4  *  线程通信的应用：经典例题：生产者/消费者问题
  5  *
  6  *
  7  *
  8  * @author Bytezero1·zhenglei!    Email:420498246@qq.com
  9  * create  2021-10-18 16:10
 10  */
 11
 12 //店员
 13 class Clerk{
 14
 15     private int productCount = 0;
 16     //生产产品
 17     public synchronized void produceProduct() {
 18
 19         if(productCount < 20){
 20             productCount++;
 21             System.out.println(Thread.currentThread().getName() +":开始生产第"+productCount+"个产品");
 22
 23             notify();  //唤醒消费者
 24
 25         }else{
 26             //等待
 27             try {
 28                 wait();
 29             } catch (InterruptedException e) {
 30                 e.printStackTrace();
 31             }
 32         }
 33
 34     }
 35
 36     //消费产品
 37     public  synchronized void  consumerProduct() {
 38         if(productCount > 0){
 39             System.out.println(Thread.currentThread().getName()+":开始消费第"+productCount+"个产品");
 40             productCount--;
 41
 42             notify();//唤醒生产者
 43
 44         }else{
 45             //等待
 46             try {
 47                 wait();
 48             } catch (InterruptedException e) {
 49                 e.printStackTrace();
 50             }
 51         }
 52     }
 53 }
 54
 55 //生产者
 56 class Producer extends Thread {
 57         private Clerk clerk;
 58
 59     public Producer(Clerk clerk) {
 60         this.clerk = clerk;
 61     }
 62
 63     @Override
 64     public void run() {
 65         System.out.println(Thread.currentThread().getName() +":开始生产产品....");
 66
 67         while (true){
 68             try {
 69                 Thread.sleep(10);
 70             } catch (InterruptedException e) {
 71                 e.printStackTrace();
 72             }
 73             clerk.produceProduct();
 74         }
 75
 76     }
 77 }
 78
 79 //消费者
 80 class Consumer extends Thread{
 81     private Clerk clerk;
 82
 83     public Consumer(Clerk clerk) {
 84         this.clerk = clerk;
 85     }
 86
 87     @Override
 88     public void run() {
 89         System.out.println(Thread.currentThread().getName() +":开始消费产品....");
 90
 91         while (true){
 92             try {
 93                 Thread.sleep(20);
 94             } catch (InterruptedException e) {
 95                 e.printStackTrace();
 96             }
 97             clerk.consumerProduct();
 98         }
 99     }
100
101 }
102 public class ProductTest {
103     public static void main(String[] args) {
104         Clerk clerk = new Clerk();
105
106         Producer p1 = new Producer(clerk);
107         p1.setName("生产者1");
108
109         Consumer c1 = new Consumer(clerk);
110         c1.setName("消费者1");
111
112         Consumer c2 = new Consumer(clerk);
113         c2.setName("消费者2");
114
115         p1.start();
116         c1.start();
117         c2.start();
118
119     }
120 }

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