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javapropertiessystem

System.getProperty returns null for defined property

I have a property TOOLS_DIR that i exported in bash

I have the following line in my java file:

String toolsDir = System.getProperty("TOOLS_DIR");

Why is this returning null? is the a compatibility issue with linux or something?

Solution

  • Environment variables and properties aren't the same thing. If you want to pass in an environment variable as property you have to add the following to your java invocation:

    -DTOOLS_DIR=$TOOLS_DIR

    Alternatively, you can use System.getEnv()