public void cargarSkin(String nombreFichero){
        
        URL url = null;
        try{
            url = SkinUtils.toURL(new File(nombreFichero));
            SkinLookAndFeel.setSkin(SkinLookAndFeel.loadThemePack(url));
            SkinLookAndFeel.enable();
        }catch(Exception ex){
            System.out.println("Error recogiendo skin : " + url);
        }
        SwingUtilities.updateComponentTreeUI(this);
        this.pack();
}