Thread的两种阻塞方法

1.thread的两种阻塞方法

   thread.join(2000);//等待2s
   CountDownLatch countDownLatch = new CountDownLatch(10);
   countDownLatch.countDown();//递减
   countDownLatch .await();//等待countDownLatch数量为0

2.样例代码

import java.util.concurrent.CountDownLatch;

/**
 * 测试线程阻塞
 * @Author dabai
 * @Date 2019/6/21
 */
public class TestThreadBlock {

    static CountDownLatch countDownLatch = new CountDownLatch(10);

    public static void main(String[] args) throws InterruptedException {
        System.out.println("主线程开始");
        Thread t1 = new MyThread();
        t1.start();
        //线程阻塞 等待线程完成 再执行下一步
//      t1.join(2000);
        countDownLatch.await();
        System.out.println("主线程结束");
    }

    static class MyThread extends Thread{

        @Override
        public void run() {
            for (int i =0 ;i<10;i++){
                System.out.println(Thread.currentThread().getName()+"正在执行"+i);
                countDownLatch.countDown();
            }
        }
    }
}