JButton
Handle action events for JButton
This is a tutorial on how to handle action events for JButtons
components in a Java Desktop Application. JButtons
are very frequently used, and it is a very standard practice to use buttons for basic input operations in GUI applications.
In order to handle action events in JButton
, all you have to do is:
- Create a class that extends
JFrame
and implementsActionListener
. - Create new
JButtons
. - Override
actionPerformed
method ofActionListener
interface. - Use
ActionEvent.getActionCommand
to get whichJButton
was pressed. - Use add to add
JButtons
to the frame.
Let’s see the following code snippet:
package com.javacodegeeks.snippets.desktop; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; public class HandleActionEventsForJButton extends JFrame implements ActionListener { private static final long serialVersionUID = 1L; public HandleActionEventsForJButton() { // set flow layout for the frame this.getContentPane().setLayout(new FlowLayout()); JButton button1 = new JButton("Yes"); JButton button2 = new JButton("No"); //set action listeners for buttons button1.addActionListener(this); button2.addActionListener(this); //add buttons to the frame add(button1); add(button2); } @Override public void actionPerformed(ActionEvent ae) { String action = ae.getActionCommand(); if (action.equals("Yes")) { System.out.println("Yes Button pressed!"); } else if (action.equals("No")) { System.out.println("No Button pressed!"); } } private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new HandleActionEventsForJButton(); //Display the window. frame.pack(); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } 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() { createAndShowGUI(); } }); } }
This was an example on how to handle action events for JButton.
Great Contents. I have also tried the Event handling in java.