ScheduledExecutorService多次启动停止

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class ScheduledExecutorServiceExample {
    public static void main(String[] args) {
        ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);

        Runnable task = () -> {
            System.out.println("Task executed at " + System.currentTimeMillis());
        };

        // 启动任务，每隔2秒执行一次
        executor.scheduleAtFixedRate(task, 0, 2, TimeUnit.SECONDS);

        // 停止任务，等待5秒后再停止
        executor.schedule(() -> {
            System.out.println("Shutting down executor...");
            executor.shutdown();
        }, 5, TimeUnit.SECONDS);

        // 等待任务执行完成
        try {
            executor.awaitTermination(10, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        System.out.println("All tasks completed.");
    }
}