// From text by Cay Horstmann: Computing Concepts and
//              Java Essentials, 2003 (3rd edition).

import java.applet.Applet;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

/**
   This applet draws a string that is centered in the
   applet window.
*/
public class FontApplet extends Applet
{  
   public void paint(Graphics g)
   {  
      Graphics2D g2 = (Graphics2D)g;

      // select the font into the graphics context

      final int HUGE_SIZE = 48;
      Font hugeFont = new Font("Serif", Font.BOLD, HUGE_SIZE);
      g2.setFont(hugeFont);

      String message = "Applet";

      // measure the string

      FontRenderContext context = g2.getFontRenderContext();
      Rectangle2D bounds = hugeFont.getStringBounds(message, context);

      double yMessageAscent = -bounds.getY();
      double yMessageDescent = bounds.getHeight() + bounds.getY();
      double yMessageHeight = bounds.getHeight();
      double xMessageWidth = bounds.getWidth();

      // center the message in the window

      double xLeft = (getWidth() - xMessageWidth) / 2;
      double yTop = (getHeight() - yMessageHeight) / 2;
      double yBase = yTop + yMessageAscent;

      g2.drawString(message, (float)xLeft, (float)yBase);

      // draw bounding rectangle

      g2.draw(new Rectangle2D.Double(xLeft, yTop, 
         xMessageWidth, yMessageHeight));

      // draw base line
      g2.draw(new Line2D.Double(xLeft, yBase, 
         xLeft + xMessageWidth, yBase));
   }
}