JCheckBoxMenuItemActionListener.java Source code

Introduction

Here is the source code for JCheckBoxMenuItemActionListener.java

Source

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

import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class JCheckBoxMenuItemActionListener {

    public static void main(final String args[]) {
        JFrame frame = new JFrame("MenuSample Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JMenuBar menuBar = new JMenuBar();

        // File Menu, F - Mnemonic
        JMenu fileMenu = new JMenu("File");
        fileMenu.setMnemonic(KeyEvent.VK_F);
        menuBar.add(fileMenu);

        // File->New, N - Mnemonic
        JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N);
        fileMenu.add(newMenuItem);

        JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Case Sensitive");
        caseMenuItem.setMnemonic(KeyEvent.VK_C);
        fileMenu.add(caseMenuItem);

        ActionListener aListener = new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                AbstractButton aButton = (AbstractButton) event.getSource();
                boolean selected = aButton.getModel().isSelected();
                String newLabel;
                Icon newIcon;
                if (selected) {
                    newLabel = "A";
                } else {
                    newLabel = "B";
                }
                aButton.setText(newLabel);
            }
        };

        caseMenuItem.addActionListener(aListener);
        frame.setJMenuBar(menuBar);
        frame.setSize(350, 250);
        frame.setVisible(true);
    }
}