Intermediate module

Module 14: Enums and Annotations

Model fixed states with enums and add lightweight metadata with annotations so your code reads more clearly.

Module lessons

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Use enums for fixed sets of values instead of fragile strings or magic numbers.

Add fields and methods to enums so each constant can carry real behavior.

Use the built-in annotations that improve safety, clarity, and compiler feedback.

Create simple custom annotations so metadata becomes part of your design.

Build a small ticket workflow using enums to model valid states and transitions.