With the option pop-up, the return value is an int. If the button labels are manually specified with a non-null argument, the integer represents the selected button position.
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class AddingIconsToOptionPopups {
public static void main(String[] a) {
JFrame frame = new JFrame();
Icon greenIcon = new ImageIcon("yourFile.gif");
Icon redIcon = new ImageIcon("");
Object iconArray[] = { greenIcon, redIcon };
JOptionPane.showOptionDialog(frame, "Continue printing?", "Select an Option",
JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, iconArray, iconArray[1]);
}
}