JDialog jdk1.5 vs jdk1.6

Question

Hi,
I'm having a different behaviour when I'm executing the following code on jdk1.5 and 1.6 :
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
class test extends JFrame {
     private JTabbedPane tabbedPane;
     private JPanel panel1;
     private JPanel panel2;
     private JPanel panel3;
     // Main method to get things started
     public static void main(String args[]) {
          // Create an instance of the test application
          test mainFrame = new test();
          mainFrame.setVisible(true);
     public test() {
          // NOTE: to reduce the amount of code in this example, it uses
          // panels with a NULL layout. This is NOT suitable for
          // production code since it may not display correctly for
          // a look-and-feel.
          setTitle("Tabbed Pane Application");
          setSize(300, 200);
          setBackground(Color.gray);
          JPanel topPanel = new JPanel();
          topPanel.setLayout(new BorderLayout());
          getContentPane().add(topPanel);
          // Create the tab pages
          createPage1();
          createPage2();
          // Create a tabbed pane
          tabbedPane = new JTabbedPane();
          tabbedPane.addTab("Page 1", panel1);
          tabbedPane.addTab("Page 2", panel2);
          topPanel.add(tabbedPane, BorderLayout.CENTER);
          tabbedPane.addChangeListener(new ChangeListener() {
               // This method is called whenever the selected tab changes
               public void stateChanged(ChangeEvent evt) {
                    JTabbedPane pane = (JTabbedPane) evt.getSource();
                    // Get current tab
                    int sel = pane.getSelectedIndex();
                    if (sel == 1) {
                         JDialog dial = new JDialog();
                         dial.setModal(true);
                         dial.setVisible(true);
     public void createPage1() {
          panel1 = new JPanel();
          panel1.setLayout(null);
          JLabel label1 = new JLabel("Username:");
          label1.setBounds(10, 15, 150, 20);
          panel1.add(label1);
          JTextField field = new JTextField();
          field.setBounds(10, 35, 150, 20);
          panel1.add(field);
          JLabel label2 = new JLabel("Password:");
          label2.setBounds(10, 60, 150, 20);
          panel1.add(label2);
          JPasswordField fieldPass = new JPasswordField();
          fieldPass.setBounds(10, 80, 150, 20);
          panel1.add(fieldPass);
     public void createPage2() {
          panel2 = new JPanel();
          panel2.setLayout(new BorderLayout());
          panel2.add(new JButton("North"), BorderLayout.NORTH);
          panel2.add(new JButton("South"), BorderLayout.SOUTH);
          panel2.add(new JButton("East"), BorderLayout.EAST);
          panel2.add(new JButton("West"), BorderLayout.WEST);
          panel2.add(new JButton("Center"), BorderLayout.CENTER);
}On jdk1.5 when I press the 2nd tab, the popup is displayed but the tab 2 is only displayed when I close the popup.
On jdk1.6 when I press the 2nd tab, the popup is displayed and tab 2 is also displayed even when I don't close the popup.
Does anyone had this kind of problem ?
I would expect to have the same behaviour on 1.5 and 1.6..
Is there any workaround to display the 2nd tab only when popup is close on jdk 1.6 ?
Regards
Tiago

Answer 1

It can easily be solved by inelegant kludge.
class test extends JFrame
  private JTabbedPane tabbedPane;
  private JPanel panel1;
  private JPanel panel2;
  private JPanel panel3;
  private boolean dlgShown = false; // *** class variable
    tabbedPane.addChangeListener(new ChangeListener()
      public void stateChanged(ChangeEvent evt)
        JTabbedPane pane = (JTabbedPane) evt.getSource();
        int sel = pane.getSelectedIndex();
        if (sel == 1)
          if (!dlgShown) // ***
            pane.setSelectedIndex(0); // ***
            JDialog dial = new JDialog();
            dial.setModal(true);
            dial.setPreferredSize(new Dimension(200, 100));
            dial.pack();
            dial.setLocationRelativeTo(null);
            dial.setVisible(true);
            dlgShown = !dlgShown; // ***
            pane.setSelectedIndex(1); // ***
          else
            dlgShown = !dlgShown;
}note: more elegant solutions most welcome!