java多线程之CyclicBarrier的使用方法

    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:

    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

 

posted @ 2022-12-14 20:02  锐洋智能  阅读(18)  评论(0编辑  收藏  举报