Problem with moving around a image with ease

Question

Hi,
I'm trying to move a image around when a keyboard button is pressed. Everything works until I tried to build in an easing movement. Here is my code:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Player extends Applet implements KeyListener
     private Image player;
     private int xpos;
     private int ypos;
     private Graphics buffer;
     private Image offscreen;
     private boolean walkright,walkleft;
     public void init()
          xpos = 10;
          ypos = 50;
          player = getImage(getCodeBase(),"mario.gif");
          offscreen = createImage(320,192);
          buffer = offscreen.getGraphics();
          buffer.drawImage(player,xpos,ypos,this);
          addKeyListener(this);
     public void update(Graphics g)
          paint(g);
     public void paint(Graphics g)
          g.drawImage(offscreen,0,0,this);
     public void keyTyped(KeyEvent e){}
     public void keyReleased(KeyEvent e){}
     public void keyPressed(KeyEvent e)
          int keyCode = e.getKeyCode();
          switch(keyCode)
               case 39:
                    moveRight();
               break;
               case 37:
               break;
          repaint();
     public void moveRight()
          walkright = true;
          int newxpos = xpos + 20;
          int temp = 0;
          System.out.println(newxpos);          
          while(walkright)
               if(xpos < newxpos)
                    temp = (newxpos-xpos)/10;
                    xpos += temp;
                    //System.out.println(xpos);     
                    buffer.clearRect(0,0,320,192);
                    buffer.drawImage(player,xpos,ypos,this);
                    repaint();
               else
                    System.out.println("in break");
                    walkright = false;     
}The problem is that the int xpos stayes the same, and I don't know why.

Answer 1

Hmm, everything works but somehow the paint method is only called ones which causes the movement 20 pixels a time. Weird :S
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Player extends Applet implements KeyListener
     private Image player;
     private double xpos;
     private double ypos;
     private Graphics buffer;
     private Image offscreen;
     private boolean walkright,walkleft;
     public void init()
          xpos = 10;
          ypos = 50;
          player = getImage(getCodeBase(),"mario.gif");
          offscreen = createImage(320,192);
          buffer = offscreen.getGraphics();
          addKeyListener(this);
     public void update(Graphics g)
          paint(g);
     public void paint(Graphics g)
          System.out.println("boe");
          buffer.drawImage(player,Math.round((int)xpos),Math.round((int)ypos),this);      
          g.drawImage(offscreen,0,0,this);
     public void keyTyped(KeyEvent e){}
     public void keyReleased(KeyEvent e){}
     public void keyPressed(KeyEvent e)
          int keyCode = e.getKeyCode();
          switch(keyCode)
               case 39:
                    walkright = true;
                    moveRight();
               break;
               case 37:
                    //moveLeft();
               break;
     public void moveRight()
        double endX = xpos + 20;
        while(walkright)
             double stepX = (endX - xpos) / 10;
             if (Math.round(xpos) < endX )
                  System.out.println(Math.round(xpos));
                   xpos += stepX;
                   buffer.clearRect(0,0,320,192);
                  repaint();
                  try
                       Thread.currentThread().sleep(100);     
                  catch(InterruptedException e){}
             else
                  walkright = false;
}