Java CountDownLatch入门极简代码示例

package com.zxl.chapter54;

import java.util.concurrent.CountDownLatch;


public class Test {
    public static void main(String[] args) throws InterruptedException {
        CountDownLatch latch = new CountDownLatch(10);

        // 启动线程
        for (int i = 0; i < 10; i++) {
            new Thread(() -> {
                try {
                    // 执行线程任务
                    System.out.println("Thread completed"+ Thread.currentThread().getName());
                } finally {
                    latch.countDown(); // 任务完成后调用 countDown
                }
            }).start();
        }

        // 等待所有线程完成
        latch.await();
    }
}