title: Java swing "children" windows
body: <p>Sorry for really simple question, but I wasnt able to find anything in the net, probably because I dont know the right terms to look for. </p>
  
  <p>When you have a desktop application, there are many so called children windows: one for options, one for "about" and so on. How to make them in Java Swing (with NetBeans tools -  optional)? </p>
  
  <p>So far I just created another JFrame and on relevant event opened it the same way Main function launches, well, main JFrame. But there's something wrong with this method: when I close child window via x in the upper right corner, whole program terminates as if I was closing the main window. This is probably because NetBeans auto generated code for x and I can find and change it somewhere... but still I have a feeling that there must be a simpler proper way to add children JFrames (or JPanels or whatever is it for children windows) ;) </p>