What is the relationship between them and the Iterable Iterator?
Iterable interface, the method comprising Returns an Iterator abstract object. There is Iterable interface is to allow different implementation class, you can traverse the collection process more flexible way.
Discussion of the above two reference may
Definitions Queue, Set, List, Map of
Queue (queue) : a linear data structure, only the delete operation is allowed in the distal Queue, Queue at the rear end of insertion,
the Set : disordered, can not contain duplicate elements set
List : ordered, duplicate elements may comprise a collection of
the Map : mapped to the key value of the data structure. A Map can not contain duplicate key, and each key can map up to a value
