import java.awt.EventQueue;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.text.Collator;
import java.util.Comparator;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileView;
public class FileViewTest {
    public static void main(String[] args) throws Exception {
        //UIManager.setLookAndFeel(new ....LookAndFeel());
        final JFileChooser jfc = new JFileChooser();
        jfc.addPropertyChangeListener(new PropertyChangeListener() {
            Icon ICON = new ImageIcon(FileViewTest.class.getResource("javax/swing/plaf/metal/icons/ocean/hardDrive.gif"));
            public void propertyChange(PropertyChangeEvent evt) {
                if (JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(evt.getPropertyName())) {
                    final File dir = jfc.getCurrentDirectory();
                    if (dir == null) {
                        return;
                    }
                    new Thread() {
                        @Override
                        public void run() {
                            File[] kids = dir.listFiles();
                            if (kids == null) {
                                return;
                            }
                            SortedSet<File> sortedKids = new TreeSet<File>(new Comparator<File>() {
                                Collator COLL = Collator.getInstance();
                                public int compare(File f1, File f2) {
                                    if (f1.isDirectory()) {
                                        if (f2.isDirectory()) {
                                            return COLL.compare(f1.getName(), f2.getName());
                                        } else {
                                            return -1;
                                        }
                                    } else {
                                        if (f2.isDirectory()) {
                                            return 1;
                                        } else {
                                            return COLL.compare(f1.getName(), f2.getName());
                                        }
                                    }
                                }
                            });
                            for (File kid : kids) {
                                if (!kid.isHidden()) {
                                    sortedKids.add(kid);
                                }
                            }
                            //System.err.println("starting in " + dir + " with " + sortedKids.size() + " children");
                            final boolean [] halt = {false};
                            for (final File kid : sortedKids) {
                                if (halt[0]) {
                                    return;
                                }
                                try {
                                    Thread.sleep(1000);
                                } catch (InterruptedException x) {}
                                final Set<File> badged = sortedKids.headSet(kid);
                                EventQueue.invokeLater(new Runnable() {
                                    public void run() {
                                        if (!dir.equals(jfc.getCurrentDirectory())) {
                                            halt[0] = true;
                                            return;
                                        }
                                        //System.err.println("doing: " + kid.getName());
                                        jfc.setFileView(new FileView() {
                                            @Override
                                            public Icon getIcon(File f) {
                                                if (f.equals(kid) || badged.contains(f)) {
                                                    return ICON;
                                                } else {
                                                    return null;
                                                }
                                            }
                                        });
                                        jfc.repaint();
                                    }
                                });
                            }
                        }
                    }.start();
                }
            }
        });
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                jfc.showOpenDialog(null);
                System.exit(0);
            }
        });
    }
}