Using environment variables in “VM options” and “Program arguments”

Question

In my project configuration in IDEA, I have the following text fields:

I woul

Answer 1

$ENV_VAR$ will be resolved correctly.

Idea uses its own notation for environment variables, they should be denoted with two dollar signs on both sides.

Answer 2

You can access environment variables using the brace-enclosed environment variable syntax. Example:

VM options: -Dfoo=${MY_ENV_VAR}

MY_ENV_VAR environment variable will be expanded properly.

Update: tested in IntelliJ IDEA 2017.1.2 and still working.

Answer 3

Environment variables are not the same thing as program arguments. If you want to pass program arguments then you would call

java MyMainClass /some/random/path 2

Then args[] would contain

0: /some/random/path
1: 2