What is Java collections framework?

The Java Collections Framework is a set of interfaces and classes that implement commonly reusable collection data structures. It provides a unified architecture for storing and manipulating groups of objects. It includes interfaces (like List, Set, Map) and concrete classes (like ArrayList, HashSet, HashMap) that provide different ways to organize data. It's commonly used for storing, retrieving, searching, and manipulating collections of objects in Java applications, providing efficient and reusable data structures for various programming tasks.