import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
public class Main {
public static void main(String[] argv) throws Exception {
JButton button = new JButton();
// Add rollover icon
Icon rolloverIcon = new ImageIcon("r.gif");
button.setRolloverIcon(rolloverIcon);
// Add pressed icon
Icon pressedIcon = new ImageIcon("p.gif");
button.setPressedIcon(pressedIcon);
// To remove rollover icon, set to null
button.setRolloverIcon(null);
// To remove pressed icon, set to null
button.setPressedIcon(null);
}
}