10. Enumeration

• Enumeration is a set of named constants, usually logically related.

• Each constant has uniquie transparent ordinal value, such as 0, 1, 2, 3, and so on.

• Enumerations can be specified

  • in a separate file within a package

  • in a related class file

  • nested within a class

• Enumeration type recognizes each of the named constant, but not the bare ordinal values

• The ordinal() method of the Enumeration type provides the actual ordinal value of a particular named constant