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Instantiation Error in AWT Applet code

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please help me. I keep getting an instantiation error in my code. it compiles fine, but doesn't work. I'm trying to place an image wherever I click the mouse in the applet.
here's the code
//<applet code="AppletApp.class" width=200 height=300></applet>
import java.awt.*; //<-- added code
import java.applet.*; //<-- added code
import java.awt.event.*; //<-- added code
abstract class AppletApp extends Applet implements MouseListener{

private Image duke;
private int xPos,yPos;

public void init() {

duke = getImage(getDocumentBase(),"duke.gif");

public void paint(Graphics g) {

g.drawImage(duke, xPos, yPos, this);
public void mousePressed(MouseEvent e) {
xPos = e.getX();
yPos = e.getY();

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