import javax.swing.JButton;
import javax.swing.JOptionPane;
public class Main {
public static void main(final String args[]) {
String s = "<html><sup>HTML</sup> <sub><em>Button</em></sub><br>"
+ "<font color=\"#FF0080\"><u>Multi-line</u></font>";
JButton button = new JButton(s);
JOptionPane.showMessageDialog(null, button);
}
}