How to display image thumbnail on file chooser in Linux(Ubuntu) machine by using java code. I have already tried some codes that successfully works in Windows platform (Refer this link : making jfilechooser show image thumbnails).
public class ThumbnailFileChooser extends JFileChooser {
private static final int ICON_SIZE = 16;
private static final Image LOADING_IMAGE = new BufferedImage(ICON_SIZE, ICON_SIZE, BufferedImage.TYPE_INT_ARGB);
private final Pattern imageFilePattern = Pattern.compile(".+?\\.(png|jpe?g|gif|tiff?)$", Pattern.CASE_INSENSITIVE);
private final Map imageCache = new WeakHashMap();
public static void main(String[] args) throws Exception {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
JFileChooser chooser = new ThumbnailFileChooser();
chooser.showOpenDialog(null);
System.exit(1);
}
public ThumbnailFileChooser() {
super();
}
{
setFileView(new ThumbnailView());
}
private class ThumbnailView extends FileView {
private final ExecutorService executor = Executors.newCachedThreadPool();
public Icon getIcon(File file) {
if (!imageFilePattern.matcher(file.getName()).matches()) {
return null;
}
synchronized (imageCache) {
ImageIcon icon = imageCache.get(file);
if (icon == null) {
icon = new ImageIcon(LOADING_IMAGE);
imageCache.put(file, icon);
executor.submit(new ThumbnailIconLoader(icon, file));
}
return icon;
}
}
}
private class ThumbnailIconLoader implements Runnable {
private final ImageIcon icon;
private final File file;
public ThumbnailIconLoader(ImageIcon i, File f) {
icon = i;
file = f;
}
public void run() {
System.out.println("Loading image: " + file);
// Load and scale the image down, then replace the icon's old image with the new one.
ImageIcon newIcon = new ImageIcon(file.getAbsolutePath());
Image img = newIcon.getImage().getScaledInstance(ICON_SIZE, ICON_SIZE, Image.SCALE_SMOOTH);
icon.setImage(img);
// Repaint the dialog so we see the new icon.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
repaint();
}
});
}
}
}
But in Linux it's not work like in windows.
