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.example.swing;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class CheckBoxDemoCreate extends JFrame {
public CheckBoxDemoCreate() throws HeadlessException {
initialize();
}
private void initialize() {
setSize(300, 300);
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("ledred.png");
JCheckBox checkBoxC = new JCheckBox("Selection C", icon);
// Add action listener to listen for click and change the image icon
// respectively
checkBoxC.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JCheckBox checkBox = (JCheckBox) e.getSource();
if (checkBox.isSelected()) {
checkBox.setIcon(new ImageIcon("ledgreen.png"));
// Perform other actions here!
} else {
checkBox.setIcon(new ImageIcon("ledred.png"));
// Perform other actions here!
}
}
});
getContentPane().add(checkBoxA);
getContentPane().add(checkBoxB);
getContentPane().add(checkBoxC);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new CheckBoxDemoCreate().setVisible(true);
}
});
}
}
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