How to Schedule a Task in Java

In this example we will show two different methods to schedule a task to run periodically in Java.

Source Code

(1)Using Thread

package com.beginner.examples;

public class RunTaskPeriodicallyExample1 {

public static void main(String[] args) {
	final long timeInterval = 1000;
	Runnable runnable = new Runnable() {
		public void run() {
			while (true) {
				System.out.println("Hello !!");
				try {
					Thread.sleep(timeInterval);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
	};
	Thread thread = new Thread(runnable);
	thread.start();
	}
}

Output:

Hello !!
Hello !!
Hello !!
Hello !!

(2)Using the Timer and TimerTask

package com.beginner.examples;

import java.util.Timer;
import java.util.TimerTask;

public class RunTaskPeriodicallyExample2 {

	public static void main(String[] args) {
		TimerTask task = new TimerTask() {
		      @Override
		      public void run() {
		        
		    	  System.out.println("Hello !!!");
		      }
		};
		Timer timer = new Timer();
		long delay = 0;
		long intevalPeriod = 1 * 1000; 
		     
		timer.scheduleAtFixedRate(task, delay,intevalPeriod);
	}
}

Output:

Hello !!
Hello !!
Hello !!
Hello !!

References

Imported packages in Java documentation:

• Timer
• TimerTask