TypeSafe config inclusion pattern

include.conf

my {
  b: "derp"
}

main.conf

include "include.conf"

my {
  a: "herp"
}

Main.java

import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;

class Scratch {
  public static void main(String[] args) {
    Config config = ConfigFactory.load();
    System.out.println(config.getConfig("my"));
  }
}

result

Config(SimpleConfigObject({"a":"herp","b":"derp"}))

run.sh

java -jar ... -Dconfig.file=main.conf