Strange behaviour with JTabbedPane

Question

Hi all,
I'm making an application where I need to use a JTabbed pane. My problem is that I need to include a heavyweight AWT component on one of my tabs, and what's happening is this heavyweight component is appearing 'on top' of the JTabbedPane. This i could understand because it's a heavyweight component, but something weird happens when I switch tabs...
If I click on Tab2 (where the heavwight component is displayed), and then click back on Tab1 then it no longer appears 'on top' of the jtabbedpane. Does anyone know what's going on, and even better, how I might fix this?
Many thanks,
BBB
Here's an exmaple of whats happening (notice Button4 is an AWT button):
import javax.swing.*;
import java.awt.*;
public class SimpleTab  extends JFrame{
    public SimpleTab()
        JButton oButton1 = new JButton("Button 1");
        JButton oButton2 = new JButton("Button 2");
        JButton oButton3 = new JButton("Button 3");
        Button oButton4 = new Button("Button 4");
        JPanel oPanel1 = new JPanel();
        JPanel oPanel2 = new JPanel();
        oPanel1.add( oButton1, BorderLayout.NORTH );
        oPanel1.add( oButton2, BorderLayout.SOUTH );
        oPanel2.add( oButton3, BorderLayout.EAST );
        oPanel2.add( oButton4, BorderLayout.WEST );
        JTabbedPane oTabbedPane = new JTabbedPane();
        oTabbedPane.add( oPanel1, "Tab1" );
        oTabbedPane.add( oPanel2, "Tab2" );
        this.getContentPane().add( oTabbedPane );
    public static void main ( String [] args )
        SimpleTab oTabP = new SimpleTab();
        oTabP.pack();
        oTabP.show();
}

Answer 1

Advice: Please don't mix AWT with Swing components.
JPanel uses the default FlowLayout, so it's suffice to just code:
oPanel1.add(oButton1);Or you could do something like this:
JPanel oPanel1 = new JPanel(new BorderLayout());
oPanel1.add(oButton1, BorderLayout.NORTH);