title: Change JButton gradient color, but only for one button, not all
body: <p>I want to change <code>JButton</code> gradient color, 
  i found this, <a href="http://java2everyone.blogspot.com/2009/01/set-jbutton-gradient-color.html" rel="noreferrer">http://java2everyone.blogspot.com/2009/01/set-jbutton-gradient-color.html</a>, but i want to change gradient for only one button, not all button </p>