In Java, a collection is a framework that provides an architecture for storing and manipulating a collection of objects. In JDK 1.2, a new framework called "Collection Framework" was created, which contains all of the collection classes and interfaces.
Collections in Java are capable of doing any data operations such as searching, sorting, insertion, manipulation, and deletion.
A single unit of objects in Java is referred to as a collection. The two basic “root” interfaces of Java collection classes are the Collection interface (java.util.Collection) and the Map interface(java.util.Map). Many interfaces (Set, List, Queue, Deque) and classes are available in the Java Collection framework (ArrayList, Vector, LinkedList, PriorityQueue, HashSet, LinkedHashSet, TreeSet).
