アプレットでキャラクターを上下左右に動かしたいのですが、まったく動きません。ここに私のコードがあります、助けてください
import javax.swing.JPanel;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import java.applet.*;
import java.awt.event.*;
import java.awt.*;
public class drawCenter extends Applet
{
private int x,y;// the x and y of the position of the player
private BufferedImage image, pos;
public void init( )
{
try
{
image = ImageIO.read(new File("pokemonCenter.png"));
pos = ImageIO.read(new File("player/maleInGame.png"));
}
catch (IOException ex)
{
}
x = 150; y = 171;
}
public void keyPressed(KeyEvent e)
{
int keyCode = e.getKeyCode();
switch( keyCode )
{
case KeyEvent.VK_UP: if( y>0 )
{
y=y-19;
repaint();
}
break;
case KeyEvent.VK_DOWN: if( y<171 )
{
y=y+19;
repaint();
}
break;
case KeyEvent.VK_LEFT:if( x>0 )
{
x=x-15;
repaint();
}
break;
case KeyEvent.VK_RIGHT:if( x<285 )
{
x=x+15;
repaint();
}
break;
}
e.consume();
}
public void keyReleased(){
}
public void paint( Graphics g )
{
g.drawImage(image, 0, 0, null);
g.drawImage(pos, x, y, null);
}
}