JFrame application = new JFrame();

try
{
  // Set LookAndFeel
  UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

  // Activate LookAndFeel toJFrame
  SwingUtilities.updateComponentTreeUI(application);
  application.pack();
} catch (Exception e) {
  e.printStackTrace();
}