在java中如何等待计时器停止？

import java.util.concurrent.CountDownLatch;

public class TimerExample {
    public static void main(String[] args) throws InterruptedException {
        // 创建一个CountDownLatch实例，计数器初始值为1
        CountDownLatch latch = new CountDownLatch(1);

        // 创建一个计时器线程
        TimerThread timerThread = new TimerThread(latch);
        timerThread.start();

        // 主线程等待计时器停止
        latch.await();

        System.out.println("计时器已停止");
    }
}

class TimerThread extends Thread {
    private CountDownLatch latch;

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

    @Override
    public void run() {
        // 模拟计时器运行
        try {
            Thread.sleep(5000); // 假设计时器运行5秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        // 计时器停止后，调用countDown方法将计数器减1
        latch.countDown();
    }
}