Setting up and using environment variables in IntelliJ Idea

I set up an environment variable (Under IDE Settings -> Path Variables)

 APP_HOME = /path/to/app_home  

One of my tests is failing however with

 System.out.println("APP HOME: " + APP_HOME); 

With

 APP HOME: null/ 

It does not look like that env variable is being read. What am i missing?

Path Variables dialog has nothing to do with the environment variables.

Environment variables can be specified in your OS or customized in the Run configuration:

If the above answer + restarting the IDE didn't do, try restarting "Jetbrains Toolbox" if you use it, this did it for me

It is possible to reference an intellij 'Path Variable' in an intellij 'Run Configuration'.

In 'Path Variables' create a variable for example ANALYTICS_VERSION.

In a 'Run Configuration' under 'Environment Variables' add for example the following:

ANALYTICS_LOAD_LOCATION=$MAVEN_REPOSITORY$\com\my\company\analytics\$ANALYTICS_VERSION$\bin

To answer the original question you would need to add an APP_HOME environment variable to your run configuration which references the path variable:

APP_HOME=$APP_HOME$