ActionButtonSample.java Source code

Introduction

Here is the source code for ActionButtonSample.java
Source

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;

public class ActionButtonSample {

    public static void main(String args[]) {
        JFrame frame = new JFrame("DefaultButton");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                String command = actionEvent.getActionCommand();
                System.out.println("Selected: " + command);
            }
        };

        Container content = frame.getContentPane();
        content.setLayout(new GridLayout(2, 2));

        JButton button1 = new JButton("Text Button");
        button1.setMnemonic(KeyEvent.VK_B);
        button1.setActionCommand("First");
        button1.addActionListener(actionListener);
        content.add(button1);

        Icon warnIcon = new ImageIcon("Warn.gif");
        JButton button2 = new JButton(warnIcon);
        button2.setActionCommand("Second");
        button2.addActionListener(actionListener);
        content.add(button2);

        JButton button3 = new JButton("Warning", warnIcon);
        button3.setActionCommand("Third");
        button3.addActionListener(actionListener);
        content.add(button3);

        String htmlButton = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>"
                + "<font color=\"#FF0080\"><u>Multi-line</u></font>";
        JButton button4 = new JButton(htmlButton);
        button4.setActionCommand("Fourth");
        button4.addActionListener(actionListener);
        content.add(button4);

        JRootPane rootPane = frame.getRootPane();
        rootPane.setDefaultButton(button2);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}