使用wait()/notify()实现三线程交替输出ABC

最新推荐文章于 2023-04-07 01:39:24 发布

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最新推荐文章于 2023-04-07 01:39:24 发布

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分类专栏：多线程

本文链接：https://blog.youkuaiyun.com/coder_my_lover/article/details/105913644

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package sort;

public class ThreeThread {
volatile Object lock = new Object();
volatile Integer count = new Integer(0);

class Thread1 extends Thread {

       @Override
       public void run() {
           while (true) {
               synchronized (lock) {
                   while (count % 3 == 0) {
                       System.out.println("A");
                       count++;
                       lock.notifyAll();
                       try {
                           lock.wait();
                       } catch (InterruptedException e) {
                           // TODO Auto-generated catch block
                           e.printStackTrace();
                       }
                   }
                   lock.notify();
                   try {
                       lock.wait();
                   } catch (InterruptedException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }

}

           }
       }
   }

class Thread2 extends Thread {

@Override
public void run() {

while (true) {

               // TODO Auto-generated method stub
               synchronized (lock) {
                   while (count % 3 == 1) {
                       System.out.println("B");
                       count++;
                       lock.notifyAll();
                       try {
                           lock.wait();
                       } catch (InterruptedException e) {
                           // TODO Auto-generated catch block
                           e.printStackTrace();
                       }
                   }
                   lock.notify();
                   try {
                       lock.wait();
                   } catch (InterruptedException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }

}

           }
       }
   }

class Thread3 extends Thread {

       @Override
       public void run() {
           while (true) {

               // TODO Auto-generated method stub
               synchronized (lock) {
                   while (count % 3 == 2) {
                       System.out.println("C");
                       count++;
                       lock.notifyAll();
                       try {
                           lock.wait();
                       } catch (InterruptedException e) {
                           // TODO Auto-generated catch block
                           e.printStackTrace();
                       }
                   }
                   lock.notify();
                   try {
                       lock.wait();
                   } catch (InterruptedException e) {
                       // TODO Auto-generated catch block
                       e.printStackTrace();
                   }

}

           }
       }
   }

   public static void main(String[] args) {

       ThreeThread tt = new ThreeThread();
       Thread t1 = tt.new Thread1();
       t1.start();
       Thread t2 = tt.new Thread2();
       t2.start();
       Thread t3 = tt.new Thread3();
       t3.start();
   }
}