Leonid Popov's Blog

JFileChooser on Windows Vista

JFileChooser on Windows Vista

Recently, Microsoft released Windows Vista, their new operating system, and almost simultaneously Sun released Java 6. Unfortunately, it turns out that some of the features in JFileChooser do not work properly on Vista. This article discusses these problems and proposes solutions.

The good news is that the primary functionality of JFileChooser is not broken. You can still browse for files and directories, observe their details and choose those you need. However, when performing these activities in certain folders, some inconveniences may arise. Let's have a look at them, one by one.

1. Public and <User> directories traversability

This issue is best reproduced with the Windows look-and-feel, although it concerns the Java look-and-feel as well (please see the GUIDs issue below). If you open a JFileChooser's dialog and navigate to the Desktop, you'll see, among others, two special folders there: Public and <User>, where <User> is the name of the user currently logged on. Unfortunately, these folders cannot be opened by double-clicking them from the desktop. But there is a workaround, and you can access them at their actual location in the file system, which is usually C:\Users\Public and C:\Users\<User>.

2. GUIDs instead of names

The handling of these special folders has another flaw when running applications with the Java look-and-feel. Not only will you be unable to enter the Public and <User> folders from the Desktop, but you will also see GUIDs instead of the folder names (GUIDs are strings like ::{4336A54D-038B-4685-AB02-99BB52D3FB8B} and are used by Windows internally). Fortunately, the workaround suggested for the previous issue still works here as well.

3. Recent folder is empty

The name of this issue says it all. Regardless of how you try to browse the Recent special folder, its contents are not shown. This happens in both Java and Windows look-and-feels, and there are no known workarounds.

Why have these issues arisen? The root cause is that Vista differs from older Windows versions not only visually. Microsoft modified their Shell API functions to be more tightly coupled with COM, and some interface methods returned slightly different values than before, so the adaptation and testing took significant time. Thankfully, this task is almost completed and we intend to provide a fixed JFileChooser with Java 6 update 2.

Comments

• Hi Leonid,
  don't you know by chance when the U2 :) is going to be released? I'm asking as if it does not happen in say a fortnight, some Java code to apply to the Filechooser seems reasonable to be posted to avoid at least the first two problems. Or they are not adderssable without native in-JRE modifications?
  Thanks,
  Mikhail
  P.S. Great to see you started blogging :) - on the photo - this is the life jacket, right?
  

  Posted by: knyazevm on March 31, 2007 at 05:46 AM

• Hi Mikhail

  Nice to see you here !
  > on the photo - this is the life jacket, right?
  
  It is a symbol that JFileChooser is unsinkable
  :-)

  alexp
  

  Posted by: alexfromsun on April 01, 2007 at 03:00 AM

• alexp:
  yes, unsinkable indeed ! And we cannot get rid of AWT at least because the authors inspire the JFileChooser author to maintain this most complex component!

  Posted by: knyazevm on April 02, 2007 at 12:06 PM

• Hi Leonid,

  Can you tell me if Java 5 has these problems as well? If so, will there be (or is there) a fix to Java 5?

  Thanks,
  Troy

  Posted by: troydugger on April 03, 2007 at 11:25 AM

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  Posted by: guntermil on May 05, 2007 at 12:55 PM

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