[Victor]

You can also configure the look and feel of Java applications. You can give it a native look easily:

try {
    UIManager.setLookAndFeel(
        UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ex) {
  System.out.println("Unable to load native look and feel");
}

There are also sites that provide look and feels that have been specially written like Home - javootoo.com
I'm not a fan of the default Swing look and feel either