Setting Shell Environment Variables from Within a Process from Java on Linux

Question

If I had a java application that needed specific environment variables to be set, but I cannot place them inside the bash.rc or bash_profile, nor can I place them in /etc/profile.d is it possible to have them set within the Java process? Or do these need to be set before the java process is run? Also manually setting them each time is not an option because I want them to be transparent to the user.

Please clarify: You want to set environment variables to hardcoded values from within the program that's then going to read those environment variables? — Oliver Charlesworth
– Oliver Charlesworth, Commented Mar 20, 2012 at 18:01
possible duplicate of How do I set environment variables from Java? — Edward Thomson
– Edward Thomson, Commented Mar 20, 2012 at 18:09

Ben Rowland · Accepted Answer · 2012-03-20 18:14:33Z

4

Start the java process from a shell script. The script would first define and export the environment variables.

answered Mar 20, 2012 at 18:14

Ben Rowland

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Comments

Adam · Accepted Answer · 2012-03-20 18:08:40Z

0

I suspect this is not possible. System.getenv() is an unmodifiable map, meaning you can't modify elements in it.

answered Mar 20, 2012 at 18:08

Adam

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1 Comment

Zack Macomber Over a year ago

He can use ProcessBuilder to set env variables - see the link I put in my post and also the "possible duplicate" comment

Zack Macomber · Accepted Answer · 2012-03-20 18:16:58Z

0

Environment Variables

And for setting environment variables, ProcessBuilder

edited Mar 20, 2012 at 18:16

answered Mar 20, 2012 at 18:08

Zack Macomber

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Comments

remi dupuis · Accepted Answer · 2012-03-20 18:00:28Z

-1

Have you try ?

System.setProperty("KEY", "VALUE");

answered Mar 20, 2012 at 18:00

remi dupuis

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2 Comments

Edward Thomson Over a year ago

That's a Java system property. It's not an environment variable.

remi dupuis Over a year ago

My bad, I wasn't careful enough.

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