title: Java JInternalFrame to JPanel
body: <p>I have got a JFrame A und 2 JInternalFrame B und C. I want to show these two Frames B and C in a JPanel, rather than a JInternalFrame. Then i will put the jpanel to another Frame. So B and C both will be shown as own JFrame.
  So my question is:
  How can i move JInternalFrame components to JPanel?</p>
  
  <p>Thanks</p>