How to display an animated gif in java swing

The type ImageIcon (sub-type of Icon) allows to display an animated GIF. Example :

// We suppose you have already set your JFrame 
Icon imgIcon = new ImageIcon(this.getClass().getResource("ajax-loader.gif"));
JLabel label = new JLabel(imgIcon);
label.setBounds(668, 43, 46, 14); // You can use your own values
frame.getContentPane().add(label);