Can you describe the structure and hierarchy of collections in Java and their mutual arrangement?

In Java, collections are organized into a hierarchy of interfaces and classes that begins with the Collection interface and extends into several main branches:

• Collection — the basic interface for most collections.
  • List — an ordered list of elements that allows duplicates (e.g., ArrayList, LinkedList).
  • Set — a collection of unique elements without a specific order (e.g., HashSet, TreeSet).
  • Queue — a collection for storing elements in processing order (e.g., LinkedList, PriorityQueue).

Separately, there is the Map interface, which does not inherit from Collection but represents a key-value mapping (e.g., HashMap, TreeMap).

The hierarchy looks approximately like this:

Iterable
 └── Collection
      ├── List
      ├── Set
      └── Queue

Map (separately)

Each of these interfaces is implemented by specific classes that provide various mechanisms for storing and accessing data, optimized for different tasks.