java.io.File network file access

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2 total messages Started by Zak Fri, 30 Aug 2002 15:18

#823

Author: Zak
Date: Fri, 30 Aug 2002 15:18

16 lines
1564 bytes

I'm trying to access a file on the network from a java class. Here is a
simple example:

java.io.File f = new java.io.File("w:\");
System.out.println(f.canRead());
System.out.println(f.isDirectory()):
java.io.File[] files = f.listFiles();

in this case the W:\ drive is mapped on the server.  canRead() returns false
isDirectory return false and
files is null

I can use this same code to access any partition on the server but can't
access anything on the network whether using a mapped drive or the UNC
\\ntserver-5 .  Is this a permissions problem or something else.  I don't
get any error.

Re: java.io.File network file access

#824

Author: Shankar Unni
Date: Fri, 30 Aug 2002 15:57

25 lines
2136 bytes

Zak wrote:

> java.io.File f = new java.io.File("w:\");

You mean "w:\\", or it wouldn't compile. You can also say w:/, by the 
way, or just "w:".

> in this case the W:\ drive is mapped on the server.  canRead() 
 > returns false, isDirectory return false and files is null

Can't reproduce this. I just tried here (on WinXP), and got the expected 
behavior whether W: was an "actual" drive, a mapped (using subst) local 
directory or a mapped network share.

(Is your w: a CD-ROM, perchance?)

> I can use this same code to access any partition on the server but can't
> access anything on the network whether using a mapped drive or the UNC
> \\ntserver-5 .  Is this a permissions problem or something else.  I don't
> get any error.

In any case, you can't just open \\ntserver-5. (I hope you said 
"\\\\nt-server5" in your source!). You can't browse the shares on a 
server using the regular File API. You can, however, browse 
"\\\\nt-server5\\Some Share"), provided you have the right permissions.

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