Runnable+CountDownLatch多线程的等待和通知

import java.util.concurrent.CountDownLatch;

public class Main {
    private static final int THREAD_COUNT = 10;

    public static void main(String[] args) {
        CountDownLatch latch = new CountDownLatch(THREAD_COUNT);

        for (int i = 0; i < THREAD_COUNT; i++) {
            Thread thread = new Thread(new MyRunnable(latch));
            thread.start();
        }

        try {
            latch.await(); // 等待所有线程完成任务
            System.out.println("所有任务已完成");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    static class MyRunnable implements Runnable {
        private final CountDownLatch latch;

        public MyRunnable(CountDownLatch latch) {
            this.latch = latch;
        }

        @Override
        public void run() {
            // 执行任务...

            // 模拟任务耗时
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            latch.countDown(); // 完成任务，计数器减1
        }
    }
}