Get font Ascent( in Java

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
/*  w w  w . j a  v  a 2  s. c  o  m*/
import javax.swing.JComponent;
import javax.swing.JFrame;

class MyCanvas extends JComponent {
  public void paint(Graphics g) {
    Font font = new Font("Serif", Font.PLAIN, 12);
    g.setFont(font);
    g.drawString("java2s.com", 10, 10);

    FontMetrics fontMetrics = g.getFontMetrics();
    g.drawString("java2s.com", 10, 10 + fontMetrics.getAscent());
  }
}

public class Main {
  public static void main(String[] a) {
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 450, 450);
    window.getContentPane().add(new MyCanvas());
    window.setVisible(true);
  }
}