Collections hierarchy is an important concept in Java. Collections hierarchy defines the order of collections and determines which collection is more specific than another.
There are four types of collections:
In Java, a collection is a framework that provides an architecture for storing and manipulating a collection of objects. Java Collections are capable of doing any data operations such as searching, sorting, insertion, manipulation, and deletion.
A collection, often known as a container, is a simple object that brings together several elements into a single entity. Aggregate data is stored, retrieved, manipulated, and communicated via collections.
Collections in Java are a key feature of the language. They provide a way for developers to organize and store data. Collections in Java come with a set of core features like iteration, sorting and filtering.