title: How to "merge" two JFrames together?
body: <p>I am desinging a GUI in Java using Swing. </p>
  
  <p>I have two JFrames in my class which I would like to merge into one window, so that when the program is launched, only one window appears. However, my specific needs impose a specific layout constraint: I need to have half of my GUI displaying two components (a JTextArea component, and a JTextPane component), and the other half displaying the third one (an Image). 
  I can get them to all work singly, but if I try to combine them into a "super-frame" to hold them all, it doesn't work.</p>
  
  <p>I am wondering is there any other way to achieve this effect. </p>
  
  <p>Any help is much appreciated, thank you!</p>