How do I create JCheckBox component?

By Wayan in Swing 0 Comment

This example demonstrate a various way to create JCheckBox component. Here you can also see how the handle an event when the checkbox is clicked by user.

package org.kodejava.swing;

import javax.swing.*;
import java.awt.*;
import java.util.Objects;

public class CheckBoxDemoCreate extends JFrame {
    public CheckBoxDemoCreate() throws HeadlessException {
        initialize();
    }

    private void initialize() {
        setSize(500, 500);
        setTitle("JCheckBox Demo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout(FlowLayout.LEFT));

        // Creating checkbox with text label
        JCheckBox checkBoxA = new JCheckBox("Selection A");

        // Creating checkbox with text label a set the state into checked
        JCheckBox checkBoxB = new JCheckBox("Selection B", true);

        // Creating checkbox with text label and a default unselected image icon
        ImageIcon icon = new ImageIcon(
                Objects.requireNonNull(
                        this.getClass().getResource("/images/lightbulb_off.png")));
        JCheckBox checkBoxC = new JCheckBox("Selection C", icon);
        // Add action listener to listen for click and change the image icon
        // respectively
        checkBoxC.addActionListener(e -> {
            JCheckBox checkBox = (JCheckBox) e.getSource();
            if (checkBox.isSelected()) {
                checkBox.setIcon(new ImageIcon(
                        Objects.requireNonNull(
                                this.getClass().getResource("/images/lightbulb.png"))));
                // Perform other actions here!
            } else {
                checkBox.setIcon(new ImageIcon(
                        Objects.requireNonNull(
                                this.getClass().getResource("/images/lightbulb_off.png"))));
                // Perform other actions here!
            }
        });

        getContentPane().add(checkBoxA);
        getContentPane().add(checkBoxB);
        getContentPane().add(checkBoxC);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new CheckBoxDemoCreate().setVisible(true));
    }
}
Swing JCheckBox Demo

Swing JCheckBox Demo

Wayan
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