Course Content

Course Content

FAQs

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:

  • ArrayList
  • LinkedList
  • HashMap
  • TreeMap

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.

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