Pong Game Problem

Question

I have a problem with my pong game. IT says its missing a return statement at :71: and at someplace else. How do I fix this? Below is the source code. Note that I haven't done puck-paddle collisions yet. It isn't supposed to do those right now anyway, so please try to fix the return statement problem, not that. Here is the code:
import java.applet.*;
import java.awt.*;
public class Ponggame extends Applet implements Runnable
     int score = 0;
     int otherscore = 0;
     int y_speed = 0;
     int other_y_speed = 0;
     int appletsize_x = 640;
     int appletsize_y = 480;     
     int xpos = 620;
     int ypos = 220;
     int otherxpos = 20;
     int otherypos = 220;
     int ball_xpos = 130;
     int ball_ypos = 130;
     int radius = 20;
     int ball_xspeed = 2;
     int ball_yspeed = 2;
     int paddle_width = 32;
     int paddle_height = 80;
     int other_paddle_width = 32;
     int other_paddle_height = 32;
     //Variables for Double Buffering
     private Image dbImage;
     private Graphics dbg;
     public void init()
          setBackground (Color.black);
     public void start()
          Thread th = new Thread (this);
          th.start ();
     public void stop()
     public void destroy()
     public boolean keyDown (Event e, int key)
          if (key == Event.UP)
               y_speed = -2;
          else if (key == Event.DOWN)
               y_speed = 2;
          else if (key == 119)
               other_y_speed = -2;
          else if (key == 115)
               other_y_speed = 2;
     public boolean keyUp (Event e, int key)
          if (key == Event.UP)
               y_speed = 0;
          else if (key == Event.DOWN)
               y_speed = 0;
          if (key == 119)
               other_y_speed = 0;
          else if (key == 115)
               other_y_speed = 0;
     public void run()
          Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
          while (true)
               if (ball_xpos > appletsize_x - radius)
                    otherscore += 1;
                    ball_xpos = 120;
                    ball_ypos = 120;
               else if (ball_xpos < radius)
                    score += 1;
                    ball_xpos = 120;
                    ball_ypos = 120;     
               else if (ball_ypos > appletsize_y - radius)
                    y_speed = -2;
               else if (ball_ypos < radius)
                    ball_yspeed = +2;
               else if (ypos<0)
                    ypos = 0;
               else if (ypos+paddle_height>appletsize_y)
                    ypos = (appletsize_y - paddle_height);
               else if (otherypos<0)
                    otherypos=0;
               else if (otherypos+other_paddle_height>appletsize_y)
                    otherypos = (appletsize_y - other_paddle_height);
               ypos += y_speed;
               otherypos += other_y_speed;
               ball_xpos += ball_xspeed;
               ball_ypos += ball_yspeed;
               // Neuzeichnen des Applets
               repaint();
               Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
     public void update (Graphics g)
          if (dbImage == null)
               dbImage = createImage (this.getSize().width, this.getSize().height);
               dbg = dbImage.getGraphics ();
          dbg.setColor (getBackground ());
          dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);
          dbg.setColor (getForeground());
          paint (dbg);
          g.drawImage (dbImage, 0, 0, this);
     public void paint (Graphics g)
          g.setColor (Color.red);
          g.fillOval (ball_xpos - radius, ball_ypos - radius, 2 * radius, 2 * radius);
          g.setColor (Color.white);
          g.fillRect (xpos, ypos, paddle_width, paddle_height);
          g.fillRect (otherxpos, otherypos, other_paddle_width, other_paddle_height);
}

Answer 1

Your public boolean keyXXX methods don't return a boolean.
And use code tags when posting code. There is a code button above the message editor.