#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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