Java并发编程CountDownLatch的使用1

朱雀 2022-06-14 22:04 130阅读 0赞

代码部分：

import java.util.concurrent.CountDownLatch;
    
    public class CountDownLatchMainTest {
        public static void main(String[] args) {
            final CountDownLatch countDown = new CountDownLatch(2);
            Thread t1 = new Thread(){
                @Override
                public void run() {
                    try {
                        System.out.println("当前线程t1：初始化完成");
                        Thread.sleep(3000);
                        System.out.println("当前线程t1：通知主线程继续执行");
                        countDown.countDown();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            Thread t2 = new Thread(){
                @Override
                public void run() {
                    try {
                        System.out.println("当前线程t2：初始化完成");
                        Thread.sleep(3000);
                        System.out.println("当前线程t2：通知主线程继续执行");
                        countDown.countDown();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            t1.start();
            t2.start();
            try {
                countDown.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("主线程继续执行");
        }
    }

运行结果：

当前线程t1：初始化完成
    当前线程t2：初始化完成
    当前线程t2：通知主线程继续执行
    当前线程t1：通知主线程继续执行
    主线程继续执行