title: Changing LaF based on OS
body: <p>Im building a GUI in Netbeans, it looks good in the designer but when I run the program it looks pretty rubbish. Im using a Mac and so I feel that it would look better using the Mac OS LAF but then when I run it on Windows, what will happen? Is a Windows system able to use the Mac LAF and vice-versa?</p>
  
  <p>I dont usually mind the Ocean/Metal LAF but it looks better on Windows than it does on Mac, is there a way to set a theme as a fallback? Or to change depending on the system its running on?</p>