Java tutorial
import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JOptionPane; public class Main { public static void main(final String args[]) { JButton button = new JButton(); Icon pressedIcon = new ImageIcon("pres-icon.gif"); button.setPressedIcon(pressedIcon); JOptionPane.showMessageDialog(null, button); } }