title: JButton background color not changing with getSystemLookANdFeel in windows
body: <p>I am trying to change background color of JButton with system look and feel on windows using UIManager. 
  Code snippet</p>
  
  <pre><code>UIManager.put("Button.contentAreaFilled",false);
  UIManager.put("Button.background",Color.white);
  UIManager.put("Button.foreground",Color.black);
  UIManager.put("Button.opaque",true);
  </code></pre>
  
  <p>But its showing the underlying OS color. Can someone suggest a workaround?</p>