Java CountDownLatch示例主线程不等待latch.await

import java.util.concurrent.CountDownLatch;

public class CountDownLatchExample {
    public static void main(String[] args) throws InterruptedException {
        int threadCount = 5;
        CountDownLatch latch = new CountDownLatch(threadCount);

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

        // 主线程等待所有工作线程完成任务
        latch.await();

        System.out.println("所有工作线程已完成任务，主线程继续执行");
    }

    static class WorkerThread implements Runnable {
        private final CountDownLatch latch;

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

        @Override
        public void run() {
            // 模拟工作线程执行任务
            try {
                Thread.sleep(1000);
                System.out.println("工作线程执行任务完成");
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                // 任务完成后，计数器减1
                latch.countDown();
            }
        }
    }
}