Java Timer 与 ExecutorService

Java Timer与ExecutorService是Java编程语言中两种常用的计时器和线程池工具。它们都可以用于在特定的时间间隔内执行任务或者调度任务的执行。本文将介绍Java Timer和ExecutorService的用法，并通过案例代码来演示它们的具体应用。

java
import java.util.Timer;
import java.util.TimerTask;
public class TimerExample {
    public static void main(String[] args) {
        Timer timer = new Timer();
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                System.out.println("Task executed!");
            }
        };
        // 延迟1秒后执行任务，然后每隔2秒重复执行任务
        timer.schedule(task, 1000, 2000);
    }
}

java
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class ExecutorServiceExample {
    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(5);
        Runnable task = new Runnable() {
            @Override
            public void run() {
                System.out.println("Task executed!");
            }
        };
        // 提交任务给ExecutorService执行
        executorService.submit(task);
        // 关闭ExecutorService
        executorService.shutdown();
    }
}