title: Changing Swing progress bar look and feel
body: <p>I keep trying to chang the UIManager to make these stupid looking green squares go away.  how do i change the look and feel of this to the user?  Is it system dependent?  Someone else who was compiling my code had a constant gradient.  Ideally, it would just be a solid square, as opposed to smaller blocks.</p>
  
  <p>Thanks</p>
  
  <p><img src="https://i.stack.imgur.com/oqrvj.jpg" alt="enter image description here"></p>