#91 Collection API in Java

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In this lecture we will learn:
Collections in Java
Components of collection API
What is the collection framework?
When to use the collection framework?


#1
In Java, collection consists of:
1. Collection API -- concept
2. Collection -- Interface
3. Collections -- Class

A framework is a set of classes and interfaces which provide a ready-made architecture.
Any group of individual objects which are represented as a single unit is known as the collection of the objects.
Collection is used to store multiple values.
Array is also used to store multiple values but it is not used in dynamic programming.
We use data structures to store and fetch the data.
Collection API is used in the java 1.2 version where you can work with all data structures by using some in-built classes.

#2
We can use an array, where the length will be fixed. We cannot expand the size of an array.
Wherever we have a specific requirement for different algorithms and structures, we can use collection API.

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