java多线程之CyclicBarrier的使用方法

时间:2022-11-06 23:14:32

java多线程CyclicBarrier的使用方法

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public class CyclicBarrierTest {
 
  public static void main(String[] args) {
    ExecutorService service = Executors.newCachedThreadPool();
    final CyclicBarrier cb = new CyclicBarrier(3);
    for(int i=0;i<3;i++){
      Runnable runnable = new Runnable(){
          public void run(){
          try {
            Thread.sleep((long)(Math.random()*10000)); 
            System.out.println("线程" + Thread.currentThread().getName() + 
                "即将到达集合地点1,当前已有" + (cb.getNumberWaiting()+1) + "个已经到达," + (cb.getNumberWaiting()==2?"都到齐了,继续走啊":"正在等候"));            
            cb.await();
             
            Thread.sleep((long)(Math.random()*10000)); 
            System.out.println("线程" + Thread.currentThread().getName() + 
                "即将到达集合地点2,当前已有" + (cb.getNumberWaiting()+1) + "个已经到达," + (cb.getNumberWaiting()==2?"都到齐了,继续走啊":"正在等候"));
            cb.await(); 
            Thread.sleep((long)(Math.random()*10000)); 
            System.out.println("线程" + Thread.currentThread().getName() + 
                "即将到达集合地点3,当前已有" + (cb.getNumberWaiting() + 1) + "个已经到达," + (cb.getNumberWaiting()==2?"都到齐了,继续走啊":"正在等候"));           
            cb.await();           
          } catch (Exception e) {
            e.printStackTrace();
          }        
        }
      };
      service.execute(runnable);
    }
    service.shutdown();
  }
}

运行结果如下:

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线程pool-1-thread-3即将到达集合地点1,当前已有1个已经到达,正在等候
线程pool-1-thread-1即将到达集合地点1,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点1,当前已有3个已经到达,都到齐了,继续走啊
线程pool-1-thread-3即将到达集合地点2,当前已有1个已经到达,正在等候
线程pool-1-thread-1即将到达集合地点2,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点2,当前已有3个已经到达,都到齐了,继续走啊
线程pool-1-thread-1即将到达集合地点3,当前已有1个已经到达,正在等候
线程pool-1-thread-3即将到达集合地点3,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点3,当前已有3个已经到达,都到齐了,继续走啊

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原文链接:http://blog.csdn.net/chuyouyinghe/article/details/46700503