title: How to to call JInternalFrame from another JInternalFrame?
body: <p>it is posible ?? call JInternalFrame from another JInternalFrame ??
  if so how?</p>
  
  <p>i've looking for the answer over many hours..
  found some question before..</p>
  
  <p>in here <a href="https://stackoverflow.com/questions/15420401/how-to-manage-a-jinternalframe-calling-another-jinternalframe">How to manage a JInternalFrame calling another JInternalFrame?</a></p>
  
  <p>I dont know that means getInstance? I think thts a container for a contentPane..
  same as this question</p>
  
  <p><a href="https://stackoverflow.com/questions/15598909/is-there-any-way-call-other-jinternalframe-from-an-jinternalframe-but-in-the-de">is there any way call other JinternalFrame from an JinternalFrame but, in the desktopPane of of main Jframe.</a></p>
  
  <p>both of that didnt give a right answer. the error always like this..</p>
  
  <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
  </code></pre>
  
  <p>help me, I've spend my day for this sad question...</p>
  
  <p>or for a another way it is posible blind/return a value to the main JFrame??? </p>
  
  <p>thanks u :)</p>