Collection Framework.txt

Collections in Java:
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Any group of individual objects which are represented as a single unit is known as the collection of the objects.

The Collection interface (java.util.Collection) and Map interface (java.util.Map) are the two main “root” interfaces of Java collection classes.

What is a Framework?
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A framework is a set of classes and interfaces which provide a ready-made architecture. In order to implement a new feature or a class, there is no need to define a framework.


Advantages of the Collection Framework: 
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1)Consistent API: 
The API has a basic set of interfaces like Collection, Set, List, or Map, all the classes (ArrayList, LinkedList, Vector, etc) that implement these interfaces have some common set of methods.
 
2)Reduces programming effort: 
A programmer doesn’t have to worry about the design of the Collection but rather he can focus on its best use in his program. Therefore, the basic concept of Object-oriented programming (i.e.) abstraction has been successfully implemented.
 
3)Increases program speed and quality: 
Increases performance by providing high-performance implementations of useful data structures and algorithms because in this case, the programmer need not think of the best implementation of a specific data structure. He can simply use the best implementation to drastically boost the performance of his algorithm/program.

Hierarchy of the Collection Framework:
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1)Collection Interface
	A)List Interface
		I)ArrayList Class
		II)LinkedList Class
		III)Stack Class
		IV)Vector Class😵

	B)Set Interface
		I)EnumSet Class😵
		II)HashSet Class
		III)LinkedHashSet Class
		IV)TreeSet Class (Sorted)

	C)Queue Interface
		I)ArrayDeque Class
		II)LinkedList Class
		III)PriorityQueue Class

2)Map Interface
		I)HashMap Class
		II)TreeMap Class (Sorted)
		III)EnumMap Class😵
		IV)LinkedMap Class
		V)WeakHashMap Class😵

3)Iterator Interface
		I)ListInterator Class😵
		
4)Arrays Class
		I)Sort method
		II)Binary Search method
		III)many more algorith method
5)Collection Class
		I)Sort method
		II)Binary Search method
		III)many more algorith method

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Reference Link: https://www.geeksforgeeks.org/collections-in-java-2/