栅栏（CyclicBarrier）初尝试

package JavaDay6_02;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

/**
 * @author myvina@qq.com
 * @date 18-6-2  上午10:33
 */

public class Demo4 {
    public static class Writer extends Thread {
        private final CyclicBarrier cyclicBarrier;

        public Writer(CyclicBarrier cyclicBarrier) {
            this.cyclicBarrier = cyclicBarrier;
        }

        @Override
        public void run() {
            try{
                Thread.sleep(1000);
                System.out.println("线程" + this.getName() + "写入数据完毕，等待其他线程写入...");
                cyclicBarrier.await();
                System.out.println("线程" + this.getName() + "关闭");
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (BrokenBarrierException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) throws BrokenBarrierException, InterruptedException {
        CyclicBarrier cyclicBarrier = new CyclicBarrier(5);

        for(int i = 0; i < 4 ; i++) {
            new Writer(cyclicBarrier).start();
        }

        cyclicBarrier.await();
        Thread.sleep(1000);
        System.out.println("所有线程写入数据完毕...");
    }
}

    运行结果为：