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Module 13: Enums and Annotations

Lesson focus

Enum Fundamentals

Define finite sets of constants with type safety and built-in methods.

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.

Lesson quiz

What is true about enum constructors?

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