Data Collection
Collections in Java
The Collection in Java is a framework that provides an architecture to store and manipulate the group of objects.
Java Collections can achieve all the operations that you perform on a data such as searching, sorting, insertion, manipulation, and deletion.
Java Collection means a single unit of objects. Java Collection framework provides many interfaces (Set, List, Queue, Deque) and classes (ArrayList, Vector, LinkedList, PriorityQueue, HashSet, LinkedHashSet, TreeSet).
What is Collection in Java
A Collection represents a single unit of objects, i.e., a group.
What is a framework in Java
- It provides readymade architecture.
- It represents a set of classes and interfaces.
- It is optional.
What is Collection framework
The Collection framework represents a unified architecture for storing and manipulating a group of objects. It has:
- Interfaces and its implementations, i.e., classes
- Algorithm
Hierarchy of Collection Framework
Let us see the hierarchy of Collection framework. The java.util package contains all the classes and interfaces for the Collection framework.
