How do i fix this code? (plz help drivin me crazy)

Question

guys i am new at this, this is the newest code i did, maybe you guys can help, i was told that it is bad to have 2 keydown methods, and to have the second one in the update class, so maybe you guys can help me find where to put it.
import java.applet.*;
import java.awt.*;
public class Keyboard extends Applet implements Runnable
     // These lines initialize the variables
     // quantities are measured in pixels
     int x_pos = 30;               // x - Position of the ball
     int y_pos = 100;          // y - Position of the ball
     int x_speed = 10;          // initial horizontal speed
     int y_speed = 10;          // initial vertical speed
     int speed_factor = 2;          // overall speed
     int delay = 20;               // msec between animation steps
     int radius = 20;          // radius of the ball
     int appletsize_x = 700;         // horizontal dimension of applet
     int appletsize_y = 400;             // vertical dimension of applet
     static int SPACE_BAR = 32;      // key code for space bar
     int last_key=0;
     // Variables for double buffering
     // used to prevent the animated image from flickering
     private Image dbImage;
     private Graphics dbg;
     public void init()
          setBackground (Color.black);
     public void start ()
          // Make a thread
          // this is part of the program that runs animation
          Thread th = new Thread (this);
          th.start ();
     public void stop()
     public void destroy()
     // This medthod or, function, changes the direction of the ball
     // depending on keyboard input
     public boolean keyDown (Event e, int key)
          last_key = key;
          if (key == Event.LEFT) // the left key was pressed
               x_speed = -1;  // so go left
          else if (key == Event.RIGHT)
               x_speed = 1;   // go right
          else if (key == SPACE_BAR)
               x_speed = 0;   // stop
               y_speed = 0;
          else if (key == Event.UP) // up key pressed
               y_speed = -1;
          else if (key == Event.DOWN) //down key pressed
               y_speed = 1;
          return true;
     public void run ()
          Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
          while (true) // start an infinite loop
               // The following lines test to see if the ball
               // has reached the edge of the screen,
               // and if it has, reverse the direction
               if (x_pos > appletsize_x - radius)
                    x_speed = -1;
               else if (x_pos < radius)
                    x_speed = +1;
               if (y_pos > appletsize_y - radius)
                    y_speed = -1;
               else if (y_pos < radius)
                    y_speed = +1;
               // this line moves the ball
               x_pos += x_speed*speed_factor;
               y_pos += y_speed*speed_factor;               
               repaint();
               try
                    Thread.sleep (delay);
               catch (InterruptedException ex)
                    // do nothing
               Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
     public void update (Graphics g)
          public boolean keyDown (Event e, int key)
               g.setColor (color.green);
               if (key == 98) {
                    g.setColor (Color.blue);
               else if (key == 114)
                    g.setColor (Color.red);
               else if (key == 103)
               g.setColor (Color.green);
               else if (key == 121)
                    g.setColor (Color.yellow);
               else if (key == 112)
                    g.setColor (Color.pink);
               return true;
          // initialize double-buffered image
          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 (Color.red);
          //dbg.drawString("The number is: "+last_key, 20, 20);
          paint (dbg);
          g.drawImage (dbImage, 0, 0, this);
          // draw the ball
          g.fillOval (x_pos - radius, y_pos - radius, 2 * radius, 2 * radius);
}

Answer 1

nah i got past that too, updated this is my code now:
import java.applet.*;
import java.awt.*;
public class Keyboard extends Applet implements Runnable {
     // These lines initialize the variables
     // quantities are measured in pixels
     int x_pos = 30;               // x - Position of the ball
     int y_pos = 100;          // y - Position of the ball
     int x_speed = 10;          // initial horizontal speed
     int y_speed = 10;          // initial vertical speed
     int speed_factor = 2;          // overall speed
     int delay = 20;               // msec between animation steps
     int radius = 20;          // radius of the ball
     int appletsize_x = 700;         // horizontal dimension of applet
     int appletsize_y = 400;             // vertical dimension of applet
     static int SPACE_BAR = 32;      // key code for space bar
     int num=0;
     // Variables for double buffering
     // used to prevent the animated image from flickering
     private Image dbImage;
     private Graphics dbg;
     public void init()
          setBackground (Color.black);
     public void start ()
          // Make a thread
          // this is part of the program that runs animation
          Thread th = new Thread (this);
          th.start ();
     public void stop()
     public void destroy()
     // This medthod or, function, changes the direction of the ball
     // depending on keyboard input
     public boolean keyDown (Event e, int key)
          num = key;
          if (key == Event.LEFT) // the left key was pressed
               x_speed = -1;  // so go left
          else if (key == Event.RIGHT)
               x_speed = 1;   // go right
          else if (key == SPACE_BAR)
               x_speed = 0;   // stop
               y_speed = 0;
          else if (key == Event.UP) // up key pressed
               y_speed = -1;
          else if (key == Event.DOWN) //down key pressed
               y_speed = 1;
          return true;
     public void run ()
          Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
          while (true) // start an infinite loop
               // The following lines test to see if the ball
               // has reached the edge of the screen,
               // and if it has, reverse the direction
               if (x_pos > appletsize_x - radius)
                    x_speed = -1;
               else if (x_pos < radius)
                    x_speed = +1;
               if (y_pos > appletsize_y - radius)
                    y_speed = -1;
               else if (y_pos < radius)
                    y_speed = +1;
               // this line moves the ball
               x_pos += x_speed*speed_factor;
               y_pos += y_speed*speed_factor;               
               repaint();
               try
                    Thread.sleep (delay);
               catch (InterruptedException ex)
                    // do nothing
               Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
     public void update (Graphics g)
          if (num == 98)
               g.setColor (Color.blue);
          else if(num == 114)
               g.setColor (Color.red);
          else if(num == 103)
               g.setColor (Color.green);
          else if(num == 121)
               g.setColor (Color.yellow);
          else if(num == 112)
               g.setColor (Color.pink);
          else
               g.setColor (Color.green);
          // initialize double-buffered image
          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 (Color.red);
          //dbg.drawString("The number is: "+last_key, 20, 20);
          paint (dbg);
          g.drawImage (dbImage, 0, 0, this);
          // draw the ball
          g.fillOval(x_pos - radius, y_pos - radius, 2 * radius, 2 * radius);
}