import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
public class MainClass {
public static void main(String[] a) {
JOptionPane optionPane = new JOptionPane();
optionPane.setMessage("Set Message");
optionPane.setMessageType(JOptionPane.INFORMATION_MESSAGE);
optionPane.setOptions(new Object[] {new JButton("Button")});
JDialog dialog = optionPane.createDialog(null, "Icon/Text Button");
dialog.setVisible(true);
}
}