title: JButton background on Nimbus LAF
body: <p>I use Nimbus LAF and I want to change the background of a simple <code>JButton</code>.</p>
  
  <pre><code>JButton jbutton = new JButton("test");
  jbutton.setBackground(Color.BLACK);
  </code></pre>
  
  <p>But it doesn't work, when I change the look and feel it works but it doesn't work in Nimbus.</p>
  
  <p>How can i do it?</p>
  
  <p>Thanks for your help.</p>