Can you list the main classes and interfaces included in the Collections API in Java?

The Java Collections API includes core interfaces and classes for working with data collections:

Core interfaces:

• Collection — the basic interface for all collections.
• List — an ordered list with the possibility of duplicate elements (e.g., ArrayList, LinkedList).
• Set — a collection without duplicates (e.g., HashSet, TreeSet).
• Queue — a queue supporting element processing order (e.g., PriorityQueue, LinkedList).
• Deque — a double-ended queue (e.g., ArrayDeque).
• Map — a key-value mapping (e.g., HashMap, TreeMap).

Core classes:

• ArrayList — a dynamic array.
• LinkedList — a doubly linked list implementing List and Deque.
• HashSet — a set based on a hash table.
• TreeSet — a set ordered by natural order or comparator.
• HashMap — a hash table for storing key-value pairs.
• TreeMap — a sorted map.
• PriorityQueue — a priority queue.

These interfaces and classes allow flexible work with various data structures and collection algorithms.