Enum Anatomy

Better option for declaring constants as provide more functionality than properties files(constructor, mutators, accessors )

1. Item 34: Use enums instead of int constants
2. Item 35: Use instance fields instead of ordinals
3. Item 36: Use EnumSet instead of bit fields
4. Item 37: Use EnumMap instead of ordinal indexing
5. Item 38: Emulate extensible enums with interfaces
6. Item 39: Prefer annotations to naming patterns
7. Item 40: Consistently use the Override annotation
8. Item 41: Use marker interfaces to define types