import java.awt.Graphics;
import javax.swing.JPanel;
public class Main extends JPanel{
String s = "Underlined text";
int x = 10;
int y = 10;
public void init() {
}
public void paint(Graphics g) {
g.drawString(s, x, y);
g.drawLine(x, y + 2, x + getFontMetrics(getFont()).stringWidth(s), y + 2);
}
}