What is the reason that the Map interface in Java is not a descendant of the Collection interface?

The Map interface in Java does not inherit from Collection because it represents a data structure based on key-value pairs, rather than individual elements like collections. Collection is intended for working with a set of elements, where each element is a separate object, whereas Map stores associations between keys and values, which is conceptually different from a set of elements.

If Map inherited from Collection, it would violate the logic and semantics of collections, as Collection methods (e.g., add, remove) are not suitable for working with key-value pairs. Therefore, Map is a separate interface that is not a subtype of Collection.