Assuming that Java 9 is still current, execute the following command to create an executable pid.jar file: jar cfe pid.jar PrintPID -C v1 PrintPID.class -C v1 Util.class --release 9 -C v2 Util.class ...

JAR files are like EXE files, except that they need a Java framework to run. Imagine them as EXE files on Windows, which you can double-click to launch the program. When you run an EXE file, it ...

I'm guessing that, when launching the program through the batch file, the current working directory is now the jar file directory (which coincidently is what I want), so using a relative path to ...