多线程辅助类之CyclicBarrier(四)

CyclicBarrier是一个线程辅助类，和《多线程辅助类之CountDownLatch(三)》功能类似，都可以实现一组线程的相互等待。要说不通点，那就是CyclicBarrier在释放等待线程后可以重用，所以称它为循环 的 barrier。具体说明参照API，此处上代码：

package face.thread.CountDownLatch;
 
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
 
public class CyclicBarrierDemo1 {
 
	public static void main(String[] args) {
 
		final SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		final CyclicBarrier start = new CyclicBarrier(3,new Runnable() {
			public void run() {
				try {
					System.out.println("准备就绪！");
					Thread.sleep(1000);
					System.out.println("开始执行！");
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});
 
		final CyclicBarrier end = new CyclicBarrier(3,new Runnable() {
			public void run() {
				System.out.println("------执行完毕-----！");
			}
		});
 
		for(int i = 0; i < 3;i++){
			new Thread(new Runnable() {
				public void run() {
					 try {
						Thread.sleep(1000);
						System.out.println(Thread.currentThread().getName() +"运动员准备就绪," + sdf.format(new Date()));
						start.await();
 
						Thread.sleep(1000);
						System.out.println(Thread.currentThread().getName() +"运动员结束比赛," + sdf.format(new Date()));
						end.await();
 
					} catch (InterruptedException e) {
						e.printStackTrace();
					} catch (BrokenBarrierException e) {
						e.printStackTrace();
					}
				}
			}).start();
		}
	}
}