How do I execute tasks at scheduled intervals

In this Q&A, we'll go over how to execute tasks at scheduled intervals.

As usual ExecutorService comes to the rescue.  ScheduledThreadPoolExecutor provides ability to execute tasks in a thread pool at scheduled rate or at scheduled period.

See example code below.

package com.javahowdoi.thread;

import java.util.concurrent.Executors;

import java.util.concurrent.ScheduledExecutorService;

import java.util.concurrent.TimeUnit;

public class SchedulerDemo {

    public static void main(String[] args ) throws InterruptedException {

        ScheduledExecutorService es = Executors.newScheduledThreadPool(1);

        // executes threads at scheduled rate

        es.scheduleAtFixedRate(() -> System.out.println("beep"), 1, 1, TimeUnit.SECONDS);

        Thread.sleep(5000);

        es.shutdown();

    }

}