Java并发编程- CyclicBarrier用法

Java并发编程- CyclicBarrier用法
使用场景：
用于多线程处理计算数据，最后合并计算结果的场景
例子：

public class CyclicBarrierTest {
   static CyclicBarrier cyclicBarrier = new CyclicBarrier(3);
    public static void main(String[] args) {

        new Thread(new Runnable() {
            public void run() 
                try {
                    Thread.sleep(1000);
                    System.out.println(1);

                    cyclicBarrier.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (BrokenBarrierException e) {
                    e.printStackTrace();
                }
            }
        }).start();

        new Thread(new Runnable() {
            public void run() {
                System.out.println(2);
                try {
                    cyclicBarrier.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (BrokenBarrierException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        try {
            cyclicBarrier.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (BrokenBarrierException e) {
            e.printStackTrace();
        }
        System.out.println(3);
    }
}