Make sure Apache Ant, a Java 8+ JDK, and Git are installed. (The set-up tips for Ant may be useful.) The required software is already installed on attu.cs.washington.edu, if you prefer to do the exercise there.
Clone the following git repository and read its README.md file: https://bitbucket.org/rjust/basic-stats
Test your set-up: compile and test the application. Note that one test failure is expected on the most recent commit of the main branch.