buffring marquee

import java.applet.*;          // involve applet packages
import java.awt.*;

public class Marquee extends Applet {
   private Image buffer;       // buffer and bufferg are
   private Graphics bufferg;   // used for double fuffering
   private int width;          // applet's wodth
   private int height;         // applet's height
   private String text;        // text for scrolling
   private int x;              // aux variable

   public void init() {        // initialization
      text = getParameter("text"); // get text
      setBackground(new Color(230,230,130));  // set bgcolor
      width = getSize().width;     // get applet's width
      height = getSize().height;   // set applet's height
      buffer = createImage(width, height); // create buffers
      bufferg = buffer.getGraphics();  // for double buffering
      x = width;
   }

   public void update(Graphics g) { //overwrites standard update
      paint(g);
   }

   public void paint(Graphics g) {  // all applet output is here
      bufferg.setColor(getBackground()); // set bgcolor 
      bufferg.fillRect(0, 0, width, height); // clean off-screen buffer
      bufferg.setColor(Color.red);       // set text color
      bufferg.drawString(text, x, 10);   // draw text at (x, y)
      g.drawImage(buffer, 0, 0, this);   // swap the buffers

      if (x < -bufferg.getFontMetrics().stringWidth(text))
         x = width;                      // next string position
      else                               // for drawing
         x = x - 1;

      try {Thread.sleep(30);}            // start animation
      catch(InterruptedException e){}

      repaint();                         // update the buffers
   }
}