title: How can we set the exit button of JFileChooser?
body: <p>we use <code>setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)</code> for <code>JFrame</code> and those classes that implements <code>JFrame</code>.</p>
  
  <p>what can we do like this for <code>JFileChooser</code>?(the window that suddenly when you push browse button will pups up)</p>