Regarding panels and internalframes

Question

Hello! I've been working at this problem for hours and I still can't seem to find a way to work it out. Anyway, hopefully someone will hear me out and help me out. I can't seem to create internal frames in java.
I've created a class that extends JFrame. I then divided this into two panels. What I wanted to do was to have the second panel contain internal frames. So what I did was contentPane.add(new InternalFrame);
The class InternalFrame simply extends JPanel. The problem is here.
In my InternalFrame constructor, I've created a JDesktopFrame which will hold my internal frames. and then I created JInternalFrame and added it into the desktopframe. The problem is, it doesn't show. Is there anyone who could help me out? What am I doing wrong?
Thanks!

Answer 1

     public classTry()
          JInternalFrame iframe = new JInternalFrame("Try",true,true,true,true);
          iframe.setSize(256,256);      
          iframe.pack();
          iframe.show();
Here's the code snippet from my extends JFrame class:
desktop = new JDesktopPane();
          this.getContentPane().add(desktop);
          desktop.add(new classTry());
               this.pack();
     this.show();
Thanks for taking time. I'm still trying to work on it as well though.