title: JFileChooser change default directory in Windows
body: <p>I want to change the default directory of my JFileChooser to "My Music" on Windows.
  This directory is <code>C:\Users\Fre\Music</code> on my account because my username is <code>Fre</code></p>
  
  <p>The default is set on <code>C:\Users\Fre\Documents</code> (depends on OS i think).
  How can I change this?</p>