How to pass Config file as arguments in Java?

I have a config.properties file in my project, and there I keep some username and repo name as inputs, for example:

username = alaskarepo = alaska-common

I want to use this config file to take input in such a way so that i can use my code multiple time and changing the parameters in the config file without creating multiple jar file of the project.

If its possible can someone please explain how can i pass the config file in as arguments?