• Maven (sudo apt-get install maven or brew install maven)

> mvn clean package  # build the jar
> java -jar target/xtoy-cli.jar example/multiply.toy < example/input.txt # run a file
0006

The JAR file contained should be platform independent, so you don't actually even need to build this project

As part of CMU Professor Phillip Compeau's Programming for Scientists course, the students write X-Toy programs using Princeton's Visual X-Toy.

However, as a TA I need to quickly run their code, which means I don't want to use Visual X-Toy. I tried to find a way to run X-Toy code on the command line, but only found traces of a CLI (TOY.java), with all the dependencies missing. Those dependencies were eventually found here, and so I put together a Maven project instead of following their incorrect instructions for compiling the source code (there are four dependencies, not simply two).