Re: System property user.dir
- From: "MikeB" <MPBrede@xxxxxxxxx>
- Date: 28 Feb 2007 13:39:30 -0800
Thank you for an excellent reply to my question. I appreciate your
advice and if I ever write a real application, I will follow it. For
now, for this project I'm working on, we have to write out a few flat
files that can be opened by the teacher. So he suggested putting them
in C:\something-or-other.
I don't like that, so I'd rather have them somewhere under ...
\problem3\something or other.
And as an aside, I also work with MS Visual Studio and created a
website from their template - that creates two user databases (to hold
photos, etc.) in the project folders. Seemed daft to me to inflate the
project folders with picture data.
Mike
On Feb 28, 1:20 pm, Eric Sosman <Eric.Sos...@xxxxxxx> wrote:
MikeB wrote On 02/28/07 13:55,:
in the Java API guide (http://java.sun.com/j2se/1.5.0/docs/api/java/io/
File.html) the docs mention a system property user.dir that supposedly
has the current user directory.
How do I access the value in this property?
String path = System.getProperty("user.dir");
... or in some cases you might want
String home = System.getProperty("user.home");
Alternately, is there another way I can establish a base directory
such that, in a subdirectory of my package/jar, I can store data for
the application to read?
Eg. if my application is running in C:x\y\z, I'd like to have a
directory whose fully-qualified name is C:x\y\z\data. If the
application is transported and later runs on D:\a\b\c\, I'd like that
directory to resolve to D:\a\b\c\data.
If the data is "fixed," meaning that you ship the data as
part of the application and treat it as read-only thereafter,
consider putting it in your .jar as a resource and using the
getResource() method of the Class class.
If the data is "variable and small," consisting of things
like user choices reflecting color schemes and so on, consider
using the java.util.prefs.Preferences class instead.
If the data is "variable and large," such as files the
user has created in earlier sessions, consider making them
independent of the location of your application and letting
them sit in whatever location the user desires. You might
use Preferences to keep track of that location (or the last
several locations) from session to session.
--
Eric.Sos...@xxxxxxx
.
- References:
- System property user.dir
- From: MikeB
- Re: System property user.dir
- From: Eric Sosman
- System property user.dir
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