Collection Frameworks in Java ArrayList class

Collections in java is a framework that provides an architecture to store and manipulate the group of objects.
All the operations that you perform on a data such as searching, sorting, insertion, manipulation, deletion etc. can be performed by Java Collections.
Java Collection simply means a single unit of objects.
Java Collection framework provides many
interfaces (Set, List, Queue, Deque etc.) and
classes (ArrayList, Vector, LinkedList, PriorityQueue, HashSet, LinkedHashSet, TreeSet etc).

The ArrayList class implements the List interface.
It uses a dynamic array to store the duplicate element of different data types.
The ArrayList class maintains the insertion order and is non-synchronized.
The elements stored in the ArrayList class can be randomly accessed.

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