How to make menu to auto close when a menu item is selected?

Question

hi ...my question is described above..
to make things clearer i have written a mini code to demonstrate my problem
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
/* just a frame with a JMenuBar with a JMenu with two RadioButtons
public class myFrame2 extends JFrame implements ActionListener{
     JMenuBar mb ;
     JMenu mi;
     JRadioButton rb1;
     JRadioButton rb2;
     public myFrame2(){
          super();
          mb = new JMenuBar();
          mi = new JMenu("New");
          rb1 = new JRadioButton("Button 1");
          rb1.addActionListener(this);
          rb1.setActionCommand("action1");
          rb2 = new JRadioButton("Button 2");
          rb2.addActionListener(this);
          rb2.setActionCommand("action2");
          mi.add(rb1);
          mi.add(rb2);
          mb.add(mi);
          setJMenuBar(mb);
          pack();
          setVisible(true);
     @Override
     public void actionPerformed(ActionEvent e) {
          // Do something......
     public static void main(String args[]){
          new myFrame2();
}If you run this program you will see that when you select a RadioButton the menu doesn't hide ...
How can i make it hide when a menu item (JradioButton) is selected?
thanks in advance
Edited by: Pitelk on Jun 10, 2008 7:42 AM

Answer 1

On a menu use JRadioButtonMenuItem.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JRadioButtonMenuItemExample {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable(){
            public void run() {
                launch();
    static void launch() {
        JMenuBar mb = new JMenuBar();
        JMenu menu = new JMenu("menu");
        mb.add(menu);
        ButtonGroup bg = new ButtonGroup();
        JRadioButtonMenuItem item1 = new JRadioButtonMenuItem("alpha");
        bg.add(item1);
        menu.add(item1);
        JRadioButtonMenuItem item2 = new JRadioButtonMenuItem("beta");
        bg.add(item2);
        menu.add(item2);
        JRadioButtonMenuItem item3 = new JRadioButtonMenuItem("gamma");
        bg.add(item3);
        menu.add(item3);
        JFrame f = new JFrame();
        f.setJMenuBar(mb);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(400, 300);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
}