← Exit to Module 13: Enums and Annotations lessons
Module progress · 0%Lesson · 12 min
Module 13: Enums and Annotations
Lesson focusEnum Fundamentals
Define finite sets of constants with type safety and built-in methods.
01 · 12 minEnum FundamentalsLocked02 · 15 minAdvanced Enum TechniquesLocked03 · 14 minBuilt-in AnnotationsLocked04 · 18 minCreating Custom AnnotationsLocked05 · 30 minMini-Project: Enum-Powered State MachineLocked
Enums extend java.lang.Enum implicitly; each constant is a singleton instance.
Add fields, constructors, and methods to enrich enum behavior (e.g., code, label).
Use EnumSet/EnumMap for high-performance sets/maps with enum keys.