public void updateLookAndFeel(String newlnfClassName) {
		if(newlnfClassName != null) {
			try {
				UIManager.setLookAndFeel(newlnfClassName);
			} catch (ClassNotFoundException e) {
				e.printStackTrace();
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			} catch (UnsupportedLookAndFeelException e) {
				e.printStackTrace();
			}
			SwingUtilities.updateComponentTreeUI(Gui_StreamRipStar.this);
		}
	}