Replacement of a JComboBox by another

Question

i have 2 jcomboboxes on a jpanel,on a jframe
the selection from the first combobox is used to create the second
when the selection on the first changes, a new second jcombobox is created (is indeed created - i watched it while debugging), but i haven't so far managed to replace the original second jcombobox with the newly created one
i tried
panel.validate();
panel,repaint();
also tried 2ndcombobox.validate(); ...
and jframe.validate(); but still nothing
anyone any ideas?

Answer 1

see if this helps. And, dukes, oh ...no thanks please! ;)
+= KRR
/* simple combobox program
* @author: K R Rajesh
public class ComboBoxDemo extends JFrame 
     JComboBox comboBox1, comboBox2;
     JLabel lbl = null;
    public ComboBoxDemo()
         String[] values1 = {"combo1", "combo2", "combo3"};
        comboBox1 = new JComboBox(values1);
        String[] values2 = {"bacon & cheese", "no cheese", "no bacon", "include all junks"};   
        comboBox2 = new JComboBox(values2);
        comboBox1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JComboBox c = (JComboBox) e.getSource();
                System.out.println("" + c.getSelectedItem());
                showDetails();
        JPanel panel = new JPanel();
        panel.add(new JLabel("Select ur combo:"));
        panel.add(comboBox1);
        lbl = new JLabel("Select ur preference:");
        panel.add(lbl);
        panel.add(comboBox2);
        lbl.setVisible(false);
        comboBox2.setVisible(false);
        Container contentPane = getContentPane();
        contentPane.add(panel);
    public void showDetails()
           lbl.setVisible(true);
        comboBox2.setVisible(true);
    public static void main(String[] args)
         ComboBoxDemo frame = new ComboBoxDemo();
        frame.setTitle("Burger Queen Menu!!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
}