Help with a pong game please

Question

I bought the book Java (all in one for dummies) and I tried writing up a code to start a pong like game and I keep on receiving this error :
--------------------Configuration: Pong - jre1.6.0_07 <Default> - <Default>--------------------
C:\Users\Adrian\Documents\JCreator LE\MyProjects\Pong\src\PongFrame.java:121: '{' expected
class Ball exntends Ellipse2D.Float
^
1 error
Process completed.
This is my code I've written :
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.concurrent.*;
public class Pong extends JApplet
     public static final int WIDTH = 400;
     public static final int HEIGHT = 400;
     private PaintSurface canvas;
     public void init()
          this.setSize(WIDTH, HEIGHT);
          canvas = new PaintSurface();
          this.add(canvas, BorderLayout.CENTER);
          ScheduledThreadPoolExecutor executor =
               new ScheduledThreadPoolExecuter(3);
          executor.scheduleAtFixedRate(new AnimationThread(this),
          0L, 20L, TimeUnit.MILLISECONDS);
class AnimationThread implements Runnable
     JApplet c;
     public AnimationThread(JApplet c)
          this.c = c;
     public void run()
          c.repaint();
class PaintSurface extends JComponent
     int paddle_x = 0;
     int paddle_y = 360;
     int score = 0;
     float english = 1.0f;
     Ball ball;
     Color[] color = {Color.Red, Color.Orange,
                          Color.Magenta, Color.Orange,
                          Color.Cyan, Color.Blue};
     int colorIndex;
     public PaintSurface()
          addMouseMotionListener(new MouseMotionAdapter()
               public void mouseMoved(MouseEvent e)
                    if (e.getX() - 30 - paddle_x > 5)
                         english = 1.5f;
                    else if (e.getX() - 30 - paddle_x < -5)
                         english = -1.5f;
                    else
                         english = 1.0f;
                    paddle_x = e.getX() - 30;
          ball = new Ball(20);
     public void paint (Graphics g)
          Graphics2D g2 = (Graphics2D)g;
          g2.setRenderingHint(
               RenderingHints.KEY_ANTIALIASING,
               RenderingHints.VALUE_ANTIALIAS_ON);
          Shape paddle = new Rectangle2D.Float(
               paddle_x, paddle, 60, 8);
          g2.SetColor(color[colorIndex % 6]);
          if (ball.intersects (paddle_x, paddle_y, 60, 8)
               && ball.y_speed > 0)
               ball.y_speed = -ball.y_speed;
               ball.x_speed = (int)(ball.x_speed * enlish);
               if (english != 1.0f)
                    colorIndex++;
               score += Math.abs(ball.x_speed * 10);
               if (ball.getY() + ball.getHeight()
                    >= Pong.HEIGT)
                    ball = new Ball (20);
                    score -= 1000;
                    colorIndex = 0;
               ball.move();
               g2.fill(ball);
               g2.setColor(Color.BLACK);
               g2.fill(paddle);
               g2.drawString("Score: " + score, 250, 20);
class Ball exntends Ellipse2D.Float
     public int x_speed, y_speed;
     private int d;
     private int width = Pong.WIDTH;
     private int height = Pong.HEIGHT;
     public Ball(int diamater)
          super((int)(Math.random() * (Pong.WIDTH - 20) + 1),
               0, diameter, diameter);
               this.d = diameter;
               this.x_speed = (int)(Math.random() * 5 + 5);
               this.y_speed = (int)(Math.random() * 5 + 5);
     public void move()
          if (super.x < 0 || super.x > width - d)
               x_speed = -x_speed;
          if (super.y < 0 || super.y > height - d)
               y_speed = -y_speed;
          super.x += x_speed;
          super.y += y_speed;
Edited by: Hottik on Nov 16, 2008 12:33 PM

Answer 1

I'm using Java a lot for school and I don't have much knowledge about game programming, but I've looked at the code and found multiple typo's, wich caused most of the problems. So use an IDE, they often reveal most of your problems =)
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.concurrent.*;
public class Pong extends JApplet
     public static final int WIDTH = 400;
     public static final int HEIGHT = 400;
     private PaintSurface canvas;
     public void init()
          this.setSize(WIDTH, HEIGHT);
          canvas = new PaintSurface();
          this.add(canvas, BorderLayout.CENTER);
          ScheduledThreadPoolExecutor executor =new ScheduledThreadPoolExecutor(3);
          executor.scheduleAtFixedRate(new AnimationThread(this),
          0L, 20L, TimeUnit.MILLISECONDS);
class AnimationThread implements Runnable
     JApplet c;
     public AnimationThread(JApplet c)
          this.c = c;
     public void run()
          c.repaint();
class PaintSurface extends JComponent
     int paddle_x = 0;
     int paddle_y = 360;
     int score = 0;
     float english = 1.0f;
     Ball ball;
     Color[] color = {Color.RED, Color.ORANGE,Color.MAGENTA, Color.ORANGE,Color.CYAN, Color.BLUE};
     int colorIndex;
     public PaintSurface()
          addMouseMotionListener(new MouseMotionAdapter()
               public void mouseMoved(MouseEvent e)
                    if (e.getX() - 30 - paddle_x > 5)
                    english = 1.5f;
                    else if (e.getX() - 30 - paddle_x < -5)
                    english = -1.5f;
                    else
                    english = 1.0f;
                    paddle_x = e.getX() - 30;
     ball = new Ball(20);
     public void paint (Graphics g)
     Graphics2D g2 = (Graphics2D)g;
     g2.setRenderingHint(
     RenderingHints.KEY_ANTIALIASING,
     RenderingHints.VALUE_ANTIALIAS_ON);
     Shape paddle = new Rectangle2D.Float(paddle_x, paddle_y, 60, 8);
     g2.setColor(color[colorIndex % 6]);
     if (ball.intersects (paddle_x, paddle_y, 60, 8)
     && ball.y_speed > 0)
     ball.y_speed = -ball.y_speed;
     ball.x_speed = (int)(ball.x_speed * english);
     if (english != 1.0f)
     colorIndex++;
     score += Math.abs(ball.x_speed * 10);
     if (ball.getY() + ball.getHeight()
     >= Pong.HEIGHT)
     ball = new Ball (20);
     score -= 1000;
     colorIndex = 0;
     ball.move();
     g2.fill(ball);
     g2.setColor(Color.BLACK);
     g2.fill(paddle);
     g2.drawString("Score: " + score, 250, 20);
class Ball extends Ellipse2D.Float
public int x_speed, y_speed;
private int d;
private int width = Pong.WIDTH;
private int height = Pong.HEIGHT;
     public Ball(int diamater)
          super((int)(Math.random() * (Pong.WIDTH - 20) + 1),0, diamater, diamater);
          this.d = diamater;
          this.x_speed = (int)(Math.random() * 5 + 5);
          this.y_speed = (int)(Math.random() * 5 + 5);
     public void move()
          if (super.x < 0 || super.x > width - d)
          x_speed = -x_speed;
          if (super.y < 0 || super.y > height - d)
          y_speed = -y_speed;
          super.x += x_speed;
          super.y += y_speed;
}