SwingSet2 has a hardcoded list of LAFs & then filters them based on "LookAndFeel.isSupportedLookAndFeel(). Since its a standalone app, when it starts up then Swing should have populated the array retgurned by UIManager.getInstalledLookAndFeels() with the correct set. Fixing this will mean that it no longer needs to call Class.forName().newInstance() which won't work for all of the platform-specific ones in the modular JDK