Handle JCheckBox event

In this example we are going to see how to handle JcheckBox events in a Java Desktop Application. Checkboxes are very commonly used when we provide the user with a list of choices and we want him to pick as many as he wishes.

Basically in order to handle JCheckBox events, one should follow these steps:

  • Create a class tha extends JFrame and implements ItemListener.
  • Create a number of JCheckBoxes.
  • Override the itemStateChanged method of ItemListener.
  • Use ItemEvent.getItem to get the item which changed state.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.desktop;

import java.awt.FlowLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JCheckBox;
import javax.swing.JFrame;

public class HandleJCheckBoxEvent extends JFrame implements ItemListener {

	private static final long serialVersionUID = 1L;

	private JCheckBox checkBox1;
	private JCheckBox checkBox2;
	private JCheckBox checkBox3;

	public HandleJCheckBoxEvent() {

		// set flow layout for the frame
		this.getContentPane().setLayout(new FlowLayout());

		checkBox1 = new JCheckBox("Checkbox 1");
		checkBox2 = new JCheckBox("Checkbox 2");
		checkBox3 = new JCheckBox("Checkbox 3");


		// add checkboxes to frame


	public void itemStateChanged(ItemEvent e) {
		if (e.getItem()==checkBox1) {
			System.out.println("Checkbox 1 state changed");
		else if (e.getItem()==checkBox2) {
			System.out.println("Checkbox 2 state changed");
		else if (e.getItem()==checkBox3) {
			System.out.println("Checkbox 3 state changed");

	private static void createAndShowGUI() {

  //Create and set up the window.

  JFrame frame = new HandleJCheckBoxEvent();

  //Display the window.





	public static void main(String[] args) {

  //Schedule a job for the event-dispatching thread:

  //creating and showing this application's GUI.

  javax.swing.SwingUtilities.invokeLater(new Runnable() {

public void run() {





This was an example on how to handle JCheckBox events.

Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.
Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Inline Feedbacks
View all comments
Back to top button