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how to set classpath

priya pillai
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Joined: Sep 12, 2007
Posts: 57
How to set the class path in linux

Regards
Philip Thamaravelil
Ranch Hand

Joined: Feb 09, 2006
Posts: 99
in a shell script:



on the command line...



to test:



cheers


philip
Jesper de Jong
Java Cowboy
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Joined: Aug 16, 2005
Posts: 14114
    
  16

To set an environment variable persistently, edit the file named .profile in your home directory and put the export command there.


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Tim Holloway
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Joined: Jun 25, 2001
Posts: 16019
    
  20

There isn't a "the" class path. CLASSPATH (all uppercase) is the shell environment variable name that Sun designated for the Java runtime to access in order to get the list of class sources.

Each Linux command shell instance has its own variable environment, although it may simply be a copy of its parent, depending on how that shell was spawned.

Depending on which shell you're using and what implementation of Linux or Unix you're working with, there are multiple places you can setup a "master" CLASSPATH. I normally use bash and set it up per-user, so I define my CLASSPATH in ~/.bash_profile.

Since CLASSPATH is an environment variable, you can set it inside a given shell session to a new value at any time or unset it entirely. That will only affect that shell session unless you export the change out to the shell's parent.

Note that when you invoke a script, it normally creates a new shell instance, so whatever CLASSPATH you set there won't reflect back to the caller unless you export it.


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