title: Set background image the same size as the window/screen in Java app
body: <p>I would like to set a background image the same size as my window/screen.</p>
  
  <p>I would <em>prefer</em> to do this in my <code>CSS</code> file, but I have <strong><em>NOT FOUND</em></strong> a way to accomplish this.</p>
  
  <p>Must I do this in a javafx class file?</p>
  
  <p>Thanks for every help ;)</p>