volume label

[mike]

Is there any way to get the volume label name in java of a certain
drive. This would be for a program that I would run in Windows XP. Of
if anyone has a suggestion of a better way to do this, I am wanting to
find out if a certain usb drive is plugged into the computer. I just
figured that the best way to test it would be to check the label,
because the label shouldn't be changing.

Any ideas?

Mike

 

[Thomas Fritsch]

Is there any way to get the volume label name in java of a certain
drive. This would be for a program that I would run in Windows XP. Of
if anyone has a suggestion of a better way to do this, I am wanting to
find out if a certain usb drive is plugged into the computer.

You can use
File[] roots = File.listRoots();
I get {C:\, D:\, E:\} when my USB-stick is plugged in, and {C:\, D:\} when
it is plugged off.

Or you can use
boolean b = (new File("E:\\")).exists();
I get true when my USB-stick is plugged in, and false when it is plugged
off.

 

[Roedy Green]

Is there any way to get the volume label name in java of a certain
drive. This would be for a program that I would run in Windows XP. Of
if anyone has a suggestion of a better way to do this, I am wanting to
find out if a certain usb drive is plugged into the computer. I just
figured that the best way to test it would be to check the label,
because the label shouldn't be changing.

This is a platform specific notion, so you need JNI to do this. Figure
out how to do it in C and write some JNI glue. I will write it for
you for $50 US, Windows only, but of course extensible to other
platforms by writing more C code.

Other possibilities: look at some of the JNI libraries I link to at
http://mindprod.com/jgloss/jni.html Some may already have the
feature.

 

[Roedy Green]

I am wanting to

another way to do that is to check for the presence of a marker file,
possibly hidden.

 

[Chris Smith]

Is there any way to get the volume label name in java of a certain
drive.

Not precisely. However, you can get the somewhat vaguer concept of the
"system display name" of a drive. There is no specification
guaranteeing what that is, but in practice, on Windows XP, it turns out
to be the volume label, followed by the drive letter in parentheses.
Good enough?

public class Test
{
public static void main(String[] args)
{
FileSystemView v = FileSystemView.getFileSystemView();
for (File f : File.listRoots())
{
System.out.println(v.getSystemDisplayName(f));
}
}
}

Although javax.swing.filechooserFileSystemView is in the Swing package,
this use of it does not depend on any other GUI concepts. It just
happens to be that the class was placed in a Swing package mainly for
the historical reason that the people writing Swing were the first
within Sun to actually need the information that the class provides.

I've also done something odd above; normally, when you're using
FileSystemView, you'd use v.getRoots() instead of File.listRoots().
However, v.getRoots() shows the "logical" roots that should be shown to
a user, and that's "Desktop" on Windows, rather than any real filesystem
roots. If you navigated with FileSystemView, you'd have to manually
follow the path through "My Computer" to the drive, and that would
involve more OS-specific code than is really necessary.

--
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