Java how to run code every 3 seconds

// how to run the code at regular intervals in java

/**
 * @author lautturi.com 
 * Java example: java run code at interval time 
 */

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

public class Lautturi {

	public static void main(String[] args) {
		/* Perform this runnable code every 5 seconds in this example */
		Runnable runnable = new Runnable() {
			public void run() {
				System.out.println("Hello Java!!");
			}
		};
		ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();
		service.scheduleAtFixedRate(runnable, 0, 3, TimeUnit.SECONDS);
	}
}