What is Class in java ?

 Table of Content

1. Introduction
2. What is mean By class?
3. Why class is important in Java ?
4. Syntax
5. Simple Example
6. Video Explanation

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Introduction:

In this Blog Post we discuss about Class in java . 

Class is most important part in object oriented programming languages like Java,python etc.

this article helps student and beginers to Understant how to create a class in simple word .

in this article we cover some point like what is class actually,Syntax of class ,Simple example of class and video that helps to understand the class in java.

Let's Start

 What is  class in java?

Class is a Blue print of Object . Class is not Physical entity because it can not consume memory.

class is collection of member function and Data members. In other world member functions are called as functions and methods. and Data members are called as Data types and variables .

Class is an example of  Encapsulation because different types of entities are grouped under a single entity .

It is also a good Example of Abstraction because it hides the sensitive information related to object.

we can not Access class members without creating its object.

Class is also called as user define Data type.

Class is declare using "class"  Keyword. and members of class are enclosed with curly braces .

Why class is Important in Java?

In Java, a class is a fundamental building block of object-oriented programming (OOP). It serves as a blueprint or template for creating objects, which are instances of the class. Classes provide a way to model and structure code in a modular and organized manner. Here are some reasons why classes are important in Java:

1. Encapsulation: 

Classes allow you to encapsulate the data (attributes) and behavior (methods) into a single unit. This is known as encapsulation, and it helps in hiding the internal implementation details of a class from the outside world. Encapsulation enhances security and maintainability by controlling access to the internal state of an object.

2. Abstraction:

Abstraction is the process of simplifying complex systems by modeling classes based on real-world entities. Classes provide a way to abstract the essential characteristics of an object while hiding unnecessary details. Through abstraction, you can focus on what an object does rather than how it achieves its functionality.

3. Inheritance:

Java supports the concept of inheritance, where a class can inherit the properties and behaviors of another class. Inheritance promotes code reuse and establishes a relationship between classes. It allows you to create a new class that is a modified version of an existing class, inheriting its attributes and methods.

4. Polymorphism:

Polymorphism allows objects to be treated as instances of their parent class, even if they are actually instances of a subclass. This enables you to write code that can work with objects of various types, making the code more flexible and extensible. Polymorphism is achieved through method overriding and interfaces.

5. Modularity and Organization:

Classes provide a way to organize code into modular units. Each class represents a self-contained module with its own set of attributes and methods. This modularity makes code more readable, maintainable, and easier to manage, especially in large and complex projects

6. Code Reusability:

Through the use of classes and inheritance, you can reuse code from existing classes in new classes. This reduces redundancy and promotes a more efficient development process. Code reusability is a key advantage of OOP, and classes play a crucial role in achieving this.

7. Ease of Maintenance :

Classes contribute to the ease of maintenance by providing a clear structure to the code. Changes to one part of the code (within a class) are less likely to affect other parts, reducing the risk of introducing bugs. This makes it easier to understand, update, and debug code over time.

Syntax:

class class_name{

//Data member

//member Function

//other class body 

}

Simple Examples:

class Test{

public Static void main(String args[]){

int a=20;

double d=20.00;

String s="this is me !"

System.out.println("a" +a);

System.out.println("d" +d);

System.out.println("s" +s);

}

}

Video Explaination of the Post

Learn more About Classes visit on JavaTpoint