class is the abstract parent of any class, such as
, which maps keys to values. Every key and every value is an object. In any one
object, every key is associated with at most one value. Given a
and a key, the associated element can be looked up. Any non-
object can be used as a key and as a value.
As a rule, the
equals method should be used by implementations of this class to decide if two keys are the same.
NOTE: This class is obsolete. New implementations should implement the Map interface, rather than extending this class.