Gifs with Swing

If you set a gif in an ImageIcon, it will stay static and only show you one frame. For a gif to show animated, you have to asign an ImageObserver(JLabel implements ImageObserver)

ImageIcon i = new ImageIcon(new File("image");
JLabel thumbnail=new JLabel();
thumbnail.setIcon(i);
if(s.toLowerCase().endsWith(".gif")){
     i.setImageObserver(thumbnail);
}