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(); 
  } 
} 

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