[java] ImageIcon displaying problem

public class App extends JFrame {  public App() {    Image image;    //load image    ImagePanel imagePanel = new ImagePanel(image);    JScrollPane scroll = new JScrollPane(imagePanel);    getContentPane.add(scroll);  }  public static void main(String args[]) {    //start up the App and display it  }}class ImagePanel extends JPanel {  Image image;  Dimension size;  public ImagePanel(Image image) {    this.image = image;    size = new Dimension(image.getWidth(), image.getHeight());  }  public void paint(Graphics g) {    g.drawImage(image, 0, 0, this);  }  public Dimension getPreferredSize() {    return size;  }}

package nl.base.apps.requestLog;import java.awt.Dimension;import java.awt.Graphics;import java.awt.Image;import java.awt.Rectangle;import java.awt.event.MouseEvent;import java.awt.event.MouseMotionListener;import java.awt.image.ImageObserver;import javax.swing.JPanel;import javax.swing.Scrollable;import javax.swing.SwingConstants;class ImagePanel extends JPanel implements Scrollable, MouseMotionListener {	Image image;	Dimension size;	private int maxUnitIncrement = 1;		public ImagePanel(Image image, ImageObserver observer, int m) {		this.image = image;		size = new Dimension(image.getWidth(observer), image				.getHeight(observer));		maxUnitIncrement = m;				// Let the user scroll by dragging to outside the window.		setAutoscrolls(true); // enable synthetic drag events		addMouseMotionListener(this); // handle mouse drags	}		public void paint(Graphics g) {		g.drawImage(image, 0, 0, this);	}		public Dimension getPreferredSize() {		return size;	}		public void mouseMoved(MouseEvent e) {	}		public void mouseDragged(MouseEvent e) {		// The user is dragging us, so scroll!		Rectangle r = new Rectangle(e.getX(), e.getY(), 50, 50);		scrollRectToVisible(r);	}		public Dimension getPreferredScrollableViewportSize() {		return getPreferredSize();	}		public int getScrollableUnitIncrement(Rectangle visibleRect,			int orientation, int direction) {		// Get the current position.		int currentPosition = 0;		if (orientation == SwingConstants.HORIZONTAL) {			currentPosition = visibleRect.x;		} else {			currentPosition = visibleRect.y;		}				// Return the number of pixels between currentPosition		// and the nearest tick mark in the indicated direction.		if (direction < 0) {			int newPosition = currentPosition			- (currentPosition / maxUnitIncrement) * maxUnitIncrement;			return (newPosition == 0) ? maxUnitIncrement : wPosition;		}		return ((currentPosition / maxUnitIncrement) + 1) * maxUnitIncrement		- currentPosition;			}		public int getScrollableBlockIncrement(Rectangle visibleRect,			int orientation, int direction) {		if (orientation == SwingConstants.HORIZONTAL) {			return visibleRect.width - maxUnitIncrement;		}		return visibleRect.height - maxUnitIncrement;			}		public boolean getScrollableTracksViewportWidth() {		return false;	}		public boolean getScrollableTracksViewportHeight() {		return false;	}		public void setMaxUnitIncrement(int pixels) {		maxUnitIncrement = pixels;	}}