With this tutorial we are going to see how to use the Timer component in Java. The Timer component is very useful when you want to schedule some tasks in your application. In our case we are going to use this component to fire up an ActionListener that prints the value of a counter.
In short, to use the Timer component you have to:
- Create an
ActionListenerand override theactionPerformedmethod. Inside that method we are going to increase the value of our counter. - Create a new
Timerand set up the interval time. UseTimer.start()method to fire up theTimer. From now on theactionPerformedmethod will fire up with the time intervals you set up in the Timer constructor.
Let’s see the code:
package com.javacodegeeks.snippets.desktop;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.Timer;
public class Counter {
private static int cnt;
public static void main(String args[]) {
new JFrame().setVisible(true);
ActionListener actListner = new ActionListener() {
@Override
public void actionPerformed(ActionEvent event) {
cnt += 1;
System.out.println("Counter = "+cnt);
}
};
Timer timer = new Timer(500, actListner);
timer.start();
}
}Output:
Counter = 1
Counter = 2
Counter = 3
Counter = 4
Counter = 5
Counter = 6
Counter = 7
Counter = 8
Counter = 9
Counter = 10
Counter = 11
Counter = 12
Counter = 13
Counter = 14
This was an example on how to work with Timer in Java.
