Read value of environment variable in Java

Question

I am setting the value an env. variable (say runOnEnv) in my terminal as:

export runOnEnv=dev

But when I am trying t access it in my java code like:

String envVarValue = System.getenv("runOnEnv");

The value of this comes out to be null.

Am I missing something? If not how can this be done ?

@SurajMenon - Would you care to share what was wrong? I am in similar situation — nanosoft
– nanosoft, Commented Jan 4, 2017 at 6:34

Anders R. Bystrup · Accepted Answer · 2014-01-28 13:29:14Z

I'm sure you mean System.getenv( "runOnEnv" ) -- including hyphens.

Are you running your Java program in the same shell as the export ...? You should be aware that export makes the variable available to the process and subprocesses, not parent processes - thus it won't be available in another shell.

Hope that helps.

Cheers,

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