Размисли на тема Java Captcha

Ето едно парче код което съсщо може да ми влезе в употреба:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.util.Random;

public class GlyphClip extends JApplet {
 public static void main(String s[]) {
  JFrame frame = new JFrame();
  frame.setTitle("Glyph and Clip");
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  JApplet applet = new GlyphClip();
  applet.init();
  frame.getContentPane().add(applet);
  frame.pack();
  frame.setVisible(true);
 }

 public void init() {
  JPanel panel = new GlyphPanel();
  getContentPane().add(panel);
 }
}

class GlyphPanel extends JPanel {
 public GlyphPanel() {
  setPreferredSize(new Dimension(500, 400));
  setBackground(Color.white);
 }

 public void paintComponent(Graphics g) {
  super.paintComponent(g);
  Graphics2D g2 = (Graphics2D) g;
  Font font = new Font("Serif", Font.BOLD, 144);
  FontRenderContext frc = g2.getFontRenderContext();
  GlyphVector gv = font.createGlyphVector(frc, "Java");
  Shape glyph = gv.getOutline(100, 200);
  g2.setClip(glyph);
  Random generator = new Random();
  int randomValue;
  for (int i = 0; i < 800; i++) {
   randomValue = generator.nextInt(2);
   Shape shape;
   if (randomValue == 0) {
    shape = new Rectangle2D.Double(Math.random() * 500, Math
      .random() * 400, 30, 20);
   } else {
    shape = new Ellipse2D.Double(Math.random() * 500, Math
      .random() * 400, 30, 20);
   }

   g2.draw(shape);
  }
 }
}