This is an open ended project.

Create, code, and test an original Java program.

Create an app => Personal Productivity Apps (To-do lists or Time trackers for personal tasks)

Design, Code, Test, Evaluate, Refactor => Write your Java code and document by adding Javadoc (/**...*/) and regular (//) comments that describe your resulting code. Debug (fix) your code when you discover behavior that doesn't match the specifications. Create unit tests using JUnit in JUnit. Evaluate your code and refactor to improve its internal structure.