Name: jk109818 Date: 03/13/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

FULL OPERATING SYSTEM VERSION :

Microsoft Windows 2000 [Version 5.00.2195]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Pentium III 1 GHz with 512 MB of RAM

A DESCRIPTION OF THE PROBLEM :
When using JFileChooser to browse directories with a large
number of files it takes a long time to load the directory.
Also by a large number of files I mean >50 which really
isn't that many there is a noticeable delay. The more files
the longer it takes.

I know it was not this slow with 1.3.1 so it is something
with 1.4. Also, if I just do a dir.list() (dir is a File
object that is a directory) and put these in a JList it is
not slow regardless of the layout orientation of the list.

I am trying to access them on a local hard drive not
networked. Furthermore I have a fairly fast machine
considering the your documentation shows a pentium 166 with
32 MB of RAM.

REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Get JFileChooser
2. Goto directory with >50 files has noticeable delay

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected: when double clicking on directory in JFileChooser
the list of files for that directory should appear
instantly provided there are a reasonable number of files
(< 1000 say) in the directory.

Actual: there is a noticeable delay when there are > 50
files in the directory

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/**
 * Should see noticeable delay to show the list of files when
 * you open try to view the contents of a directory with a large
 * number of files.
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class FileChooserTest extends JFrame
{
  public FileChooserTest()
  {
    super("FileChooserTest");
    getContentPane().add(new JFileChooser(), BorderLayout.CENTER);
    pack();

    addWindowListener(new WindowAdapter()
    {
      public void actionPerformed(ActionEvent e)
      {
        dispose();
        System.exit(0);
      }
    });
  }

  public static void main(String[] args)
  {
    FileChooserTest test=new FileChooserTest();
    test.show();
  }
}
---------- END SOURCE ----------

CUSTOMER WORKAROUND :
Use 1.3.1 or write my own FileChooser

Release Regression From : 1.3.1
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Review ID: 144113)
======================================================================