java-多线程-CountDownLatch(闭锁) CyclicBarrier(栅栏) Semaphore(信号量)-

package threadMy;
 
import java.util.concurrent.CountDownLatch;
 
public class CountDownLatchTest {
 
  public static void main(String[] args) {
 
    final CountDownLatch countDownLatch = new CountDownLatch(5);
 
    System.out.println("现在6点下班了.....");
 
    // rodert线程启动
    new Thread(new Runnable() {
      @Override
      public void run() {
 
        try {
          // 这里调用的是await()不是wait()
          countDownLatch.await();
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        System.out.println("...其他的5个员工走光了，rodert终于可以走了");
      }
    }).start();
 
    // 其他员工线程启动
    for (int i = 0; i < 5; i++) {
      new Thread(new Runnable() {
        @Override
        public void run() {
          System.out.println("员工xxxx下班了");
          countDownLatch.countDown();
        }
      }).start();
    }
  }
}