CODEWITHSUNDEEP
javawindows-7
Junaid S.
Junaid S.

Reputation: 2642

Can JAVA change environment variables?

I can get environment variable like this

final String value = System.getenv("PE_CONF_PWD");

But how can I change environment variables ??

Upvotes: 2

Views: 862

Answers (1)

SouvikMaji
SouvikMaji

Reputation: 1145

The Java System class doesn't let you set environment variables for you Operating system directly. You can retrieve them using getenv() but there is no equivalent setenv() method. When you start up the JVM, it copies your os's environment into its own Map of Strings. The actual container it uses is an unmodifiable map, probably to be extra safe. So in a running Java application you have 2 environments: the JVM copy that you can read via System.getenv() and the underlying environment that lives in the C library.
You should be able to change the JVM's copy using Reflection.

Upvotes: 2

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