"Collection" is an interface where the interfaces Set, List and Queue extend from. These in turn are implemented by the different classes, e.g. the interface Set by HashSet.
"Collections" is a class that holds all kind of static methods. For example Collections.sort(List<T> list) that will sort a list or its overload Collections.sort(List<T> list, Comparator<? super T> c).
"Map"s are also a collection and thus part of the Collection Framework, but "Map" simply does not extend from "Collection".
The Collection Framework is a help for the programmer to make use of well defined, loose coupled and high cohesive classes and interfaces that have been tested to be "perfect".
This should give you a first overview. Good luck.
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