2 JButtons, both have focus. Why?

Question

Hi
Please take a look at the Programm down there.
Im creating 2 Buttons. Each Button has a reference to the the other one. When i push any Button, i show 2 Messageboxes and give the focus to the other button. After the second Messagebox has been hidden, it looks like that both Button in the Frame have the focus. requestFocus works only once. After the 2nd requestFocus its impossible to change Focus by pressing the tab-key. When i show only 1 Message, everything works fine. Whats the problem?.
thanxx for your help
Kaltenbrunner Siegfried, A
// --- Starting here
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SimpleTest
    public static void main (String args[])
        JFrame frm = new JFrame();
        KButton b1 = new KButton(frm, "Button1");
        KButton b2 = new KButton(frm, "Button2");
        b1.setF(b2);
        b2.setF(b1);
        frm.getContentPane().add(b1, BorderLayout.NORTH);
        frm.getContentPane().add(b2);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frm.pack();
        frm.setVisible(true);
    private static class KButton extends JButton implements ActionListener
        Frame frm;
        JComponent f;
        KButton(Frame P_frm, String Ps_caption)
            super(Ps_caption);
            setName(Ps_caption);
            addActionListener(this);
            frm = P_frm;
        public void setF (JComponent c)
            f = c;
        public void actionPerformed(ActionEvent e)
            try
                JOptionPane.showMessageDialog(frm, "Message1");
                JOptionPane.showMessageDialog(frm, "Message2");
                f.requestFocus();
            catch (Exception ex)
                ex.printStackTrace();
}

Answer 1

Hi,
Your program is correct, only thing what you were missing I have added that to your code and giving you back. Tell me whether it works as you wanted or not.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SimpleTest
     public static void main (String args[])
          JFrame frm = new JFrame();
          KButton b1 = new KButton(frm, "Button1");
          KButton b2 = new KButton(frm, "Button2");
          b1.setF(b2);
          b2.setF(b1);
          frm.getContentPane().add(b1, BorderLayout.NORTH);
          frm.getContentPane().add(b2);
          frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frm.pack();
          frm.setVisible(true);
     private static class KButton extends JButton implements ActionListener
          Frame frm;
          JComponent f;
          KButton(Frame P_frm, String Ps_caption)
               super(Ps_caption);
               setName(Ps_caption);
               addActionListener(this);
               frm = P_frm;
          public void setF (JComponent c)
               f = c;
          public void actionPerformed(ActionEvent e)
               try
                    /////// Added
                    if(e.getActionCommand().equals("Button1"))
                         JOptionPane.showMessageDialog(frm, "Message1");
                    /////// Added
                    else
                         JOptionPane.showMessageDialog(frm, "Message2");
                    f.requestFocus();
               catch (Exception ex)
                    ex.printStackTrace();
Happy Coding.
Deepak