Java的四种常见线程池及Scheduled定时线程池实现详解

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class ScheduledThreadPoolExample {
    public static void main(String[] args) {
        // 创建ScheduledThreadPool，参数为线程池的大小
        ScheduledExecutorService scheduledThreadPool = Executors.newScheduledThreadPool(3);
        // 延迟1秒后执行任务
        scheduledThreadPool.schedule(new RunnableTask(), 1, TimeUnit.SECONDS);
        // 延迟2秒后执行任务，并且每隔3秒执行一次
        scheduledThreadPool.scheduleAtFixedRate(new RunnableTask(), 2, 3, TimeUnit.SECONDS);
        // 延迟2秒后执行任务，任务执行完成后，再延迟3秒执行下一次任务
        scheduledThreadPool.scheduleWithFixedDelay(new RunnableTask(), 2, 3, TimeUnit.SECONDS);
        // 关闭线程池
        scheduledThreadPool.shutdown();
    }
    static class RunnableTask implements Runnable {
        @Override
        public void run() {
            System.out.println("Task is running. Thread: " + Thread.currentThread().getName());
        }
    }
}