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();   } } 

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