GIF icon wont display in JList

Question

Hello.
During development of a single application I've encountered a strange bug:
I am unable to display a gif icon in JList using JLabel as the cell renderer. Png icons work.
Could someone please point me to the obvious flaw in my example? :)
Example as netbeans project:
http://www.megaupload.com/?d=GVCDVO1F
Example code:
* GifIconInList.java
* Created on 28. srpen 2008, 11:03
package gificoninlist;
import java.awt.Color;
import java.awt.Component;
import java.net.URL;
import javax.swing.DefaultListModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
* @author  Bedla
public class GifIconInList extends javax.swing.JFrame {
    DefaultListModel listModel = new DefaultListModel();
    /** Creates new form GifIconInList */
    public GifIconInList() {
        initComponents();
    class labelCellRenderer extends JLabel implements ListCellRenderer {
        public labelCellRenderer() {
            setOpaque(true);
        public Component getListCellRendererComponent(JList list,
                Object value,
                int index,
                boolean isSelected,
                boolean cellHasFocus) {
            if (value instanceof JLabel) {
                JLabel label = (JLabel) value;
                if (isSelected) {
                    label.setBackground(list.getSelectionBackground());
                    label.setForeground(list.getSelectionForeground());
                } else {
                    label.setBackground(Color.white);
                    label.setForeground(Color.black);
                return label;
            return this;
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jScrollPane1 = new javax.swing.JScrollPane();
        jList = new javax.swing.JList();
        addPngButton = new javax.swing.JButton();
        addGifButton = new javax.swing.JButton();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jList.setModel(listModel);
        jList.setCellRenderer(new labelCellRenderer());
        jScrollPane1.setViewportView(jList);
        addPngButton.setText("Add PNG");
        addPngButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                addPngButtonActionPerformed(evt);
        addGifButton.setText("Add GIF");
        addGifButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                addGifButtonActionPerformed(evt);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 287, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(addPngButton)
                    .addComponent(addGifButton))
                .addContainerGap())
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(31, 31, 31)
                        .addComponent(addPngButton)
                        .addGap(37, 37, 37)
                        .addComponent(addGifButton))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 278, Short.MAX_VALUE)))
                .addContainerGap())
        pack();
    }// </editor-fold>
private void addPngButtonActionPerformed(java.awt.event.ActionEvent evt) {
    URL iconURL = GifIconInList.class.getResource("otevren.PNG");
    Icon icon = new ImageIcon(iconURL);
    JLabel label = new JLabel("PNG icon: " + icon, icon, JLabel.CENTER);
    listModel.addElement(label);
private void addGifButtonActionPerformed(java.awt.event.ActionEvent evt) {
    URL iconURL = GifIconInList.class.getResource("otevrenblik.gif");
    Icon icon = new ImageIcon(iconURL);
    JLabel label = new JLabel("GIF icon: " + icon, icon, JLabel.CENTER);
    listModel.addElement(label);
    * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new GifIconInList().setVisible(true);
    // Variables declaration - do not modify
    private javax.swing.JButton addGifButton;
    private javax.swing.JButton addPngButton;
    private javax.swing.JList jList;
    private javax.swing.JScrollPane jScrollPane1;
    // End of variables declaration
}

Answer 1

I had write a program to display gif images inside a JList.
Here is the code
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class ImageList
    BufferedImage[] images;
    JList list;
    public ImageList()
        loadImages();
        list = new JList(images);
        list.setCellRenderer(new ImageRenderer());
    private void loadImages()
        String[] fileNames = {
            "1", "2", "3", "4"
        images = new BufferedImage[fileNames.length];
        for(int i = 0; i < images.length; i++)
            try
                String path = "images/" + fileNames + ".gif";
URL url = getClass().getResource(path);
images[i] = ImageIO.read(url);
catch(MalformedURLException mue)
System.out.println("url: " + mue.getMessage());
catch(IOException ioe)
System.out.println("read: " + ioe.getMessage());
public static void main(String[] args)
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new JScrollPane(new ImageList().list));
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
class ImageRenderer extends DefaultListCellRenderer
public Component getListCellRendererComponent(JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus)
// for default cell renderer behavior
Component c = super.getListCellRendererComponent(list, value,
index, isSelected, cellHasFocus);
// set icon for cell image
((JLabel)c).setIcon(new ImageIcon((BufferedImage)value));
((JLabel)c).setText("");
return c;
Here is netbeans project:
[http://www.mediafire.com/?nl29dl4tteu]
Note: If you check image 2.gif inside the src/images dir you will found that it is an animated gif but JList is displaying it as static image.
Bedla if you want both image and text then create a class like thisclass ListItem {
private BufferedImage image;
private String value;
public ListItem(
BufferedImage c, String s) {..}
public Color getImage() {..}
public String getValue() {..}