public static void disableNewFolderButton(Container c) 
    {
	int len = c.getComponentCount();
	for (int i = 0; i < len; i++)
	{
	    Component comp = c.getComponent(i);
	    if (comp instanceof JButton) 
	    {
		JButton b = (JButton) comp;
		Icon icon = b.getIcon();
		if (icon != null && icon == UIManager.getIcon("FileChooser.newFolderIcon"))
		    b.setEnabled(false);
	    } else if (comp instanceof Container) { disableNewFolderButton((Container) comp); }
	}
    }