Changing animated images via combobox

Question

Hi,
Any help is greatly appreciated with this problem: I have an applet that allows a small moveable image to be manipulated within a larger one. It works fine when I hard code the image filenames but I cannot get it to work when I use a combobox to allow choices of the two image files. Here is the code:
package elaine;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.URL;
* <p>Title: Wavelength Filter Viewer</p>
* <p>Description: View the image through a filter</p>
* <p>Copyright: Copyright (c) 2002</p>
* <p>Company: Elaine</p>
* @author unascribed
* @version 1.0
public class AppletElaine extends JApplet implements MouseMotionListener{
private Container c = getContentPane();
private BorderLayout layout;
private JPanel cboxPanel;
private JPanel viewPanel;
private JViewport vp = null;
private RasterComponent rc = null;
private RasterComponent rc2 = null;
String var1, var2;
private JButton circle;
private JComboBox imagesOne;
private JComboBox imagesTwo;
private String names[] =
{ "seit_171.jpg", "seit_195.jpg", "seit_284.jpg", "seit_304.jpg",
"smdi.jpg", "norh_17ghz.jpg", "nancay_183cm.gif"};
Image img1 = null;
Image img2 = null;
private boolean inAnApplet = true;
URL codeBase; //used for applet version only
boolean isStandalone = false;
//Construct the applet
public AppletElaine() {
//Initialize the applet
public void init() {
layout = new BorderLayout( 5,5 );
c.setLayout( layout );
cboxPanel = new JPanel();
viewPanel = new JPanel();
imagesOne = new JComboBox(names);
imagesTwo = new JComboBox(names);
cboxPanel.setLayout( new GridLayout( 1, 2 ) );
cboxPanel.add( imagesOne );
cboxPanel.add( imagesTwo );
imagesOne.addItemListener( new ItemListener() {
public void itemStateChanged( ItemEvent e )
loadImages( names[ imagesOne.getSelectedIndex() ],
                    names[ imagesTwo.getSelectedIndex() ] );
imagesTwo.addItemListener( new ItemListener() {
public void itemStateChanged( ItemEvent e )
loadImages( names[ imagesOne.getSelectedIndex() ],
                    names[ imagesTwo.getSelectedIndex() ] );
c.add( viewPanel, BorderLayout.CENTER );
c.add( cboxPanel, BorderLayout.NORTH);
     setSize(400,420);
show();
public void loadImages( String var1, String var2 ) {
     try
     img1 = getImage( new URL( getCodeBase(), var1 ) );
     img2 = getImage( new URL( getCodeBase(), var2 ) );
     catch( Exception e )
     e.printStackTrace();
     rc = new RasterComponent( img1 );
     rc.setBounds( 0, 0, rc.getPreferredSize().width,
          rc.getPreferredSize().height );
     rc.addMouseMotionListener( this );
     vp = new JViewport();
     rc2 = new RasterComponent( img2 );
     vp.setView( rc2 );
     vp.setBounds( 0, 300, 100, 100 );
     viewPanel.add( vp );
     viewPanel.add( rc );
public void mouseMoved( MouseEvent e )
     int x = e.getX() - vp.getExtentSize().width / 2;
     int y = e.getY() - vp.getExtentSize().height / 2;
     vp.setViewPosition( new Point( x, y ) );
     vp.setBounds( x, y, 100, 100 );
public void mouseDragged( MouseEvent e )
private class RasterComponent extends JComponent
     private Image image = null;
     private Dimension size = null;
     public RasterComponent( Image img )
     image = img;
     loadImage();
     public Dimension getPreferredSize()
     return size;
     public void paint( Graphics g )
     g.drawImage( image, 0, 0, size.width,
               size.height, this );
     protected void loadImage()
     MediaTracker tracker = new MediaTracker( this );
     tracker.addImage( image, 1 );
     try
          tracker.waitForAll();
     catch( InterruptedException e ){}
     if ( size == null )
          size = new Dimension( image.getWidth( this ),
                         image.getHeight( this ) );
     setSize( size );
That's it. Thanks!

Answer 1

try this way:
public void loadImages( String var1, String var2 ) {
try
img1 =
(new ImageIcon(getClass().getClassLoader().getResource(var1))).getImage();
catch( Exception e )
e.printStackTrace();
//...