What are the OOPS Concept in JAVA? Do you explain that Concept .

-

 Q. What are the OOPS Concept in JAVA? Do you explain that Concept .

Ans :- OOPS stands for (Object oriented programming system)

=> The process of constructing programs using class-object concept is known as object-oriented programming.

These  are OOPS Concepts-

1.Object

2.Class

3.Inheritance

4.Polymorphism

5.encapsulation

6.Abstraction.

1.Object- 

=> Object is a instance of a Class.

=> Object  is a storage releated  to a class holding instance member of a class.

=>We use  "new " keyword in creating Objects.

=>Object is created in Heap Area of JVM.

=>Object will hold instance member of class.


2.Class:-

=> Class is a structured Layout generating Object.
=> Class is  a user defined datatype
=> Class is a Collection of variables, methods, blocks and constructor.

3.Inheritance:-

=> Inheritance in JAVA is a mechanism in which one object acquires all the properties and behavior of a parent object is known as Inheritance process.

=>The process of extracting the features from one class into another class is known as Inheritance process.

Types of Inheritance-

1.Single Inheritance
2.Multiple Inheritance
3.Multi-Level Inheritance
4.Hierarchal Inheritance
5.Hybrid Inheritance


4.Polymorphism:-

=>  Polymorphism in java is a concept by which we can perform a single action indifferent ways. Polymorphism  is derived from 2 greek word : "Poly " and "morphs"  means forms. so polymorphism means many forms.

There are two types of polymorphism in JAVA-

1. Compile-time Polymorphism (Method Overloading)
2. Rum-time Polymorphism (Method Overriding)


5.encapsulation:-

=> binding the data member and member function into the single unit is known as encapsulation
=>The process of binding the All the programming components into a single-unit Class is known as encapsulation process

6.Abstraction:-

=>Hiding the implementation details and showing only functionality to the user is known as Abstraction

=>the process of hiding the background implementation from the end user is known as Abstraction process.

=>In java we use "Interfaces"  and "AbstractClasses" to acheive Abstraction process. 



Comments

Post a Comment

Popular posts from this blog

What are POJO classes in spring? What is the use of POJO Class, and How to create POJO classes.

-
TCS Interview Question  3+ What are POJO classes in spring? What is the use of POJO Class, and How to create POJO classes. POJO -  POJO stands for "plain old java object" .It is an Ordinary JAVA Object, not bound  by any special restriction other than those forced by the JAVA Language Specification and not requiring any class path. POJO's are used for increasing the readability and re-usability of a program. => The term POJO was introduced by Martin Flower (An American Software developer) in 2000. It is available in JAVA from the EJB 3.0 by sun microsystem. Generally, a POJO Class contains Variables and their Setters & Getters. => The POJO Classes Similar to beans as both are used to define the Objects to increase the readability and reusability . => The only difference between them ,that Bean Files have some restrictions but, the POJO files do not have any Special restrictions. What is the use of  POJO Classes:- => The POJO Class in JAVA is used to ...
Read more

How to create React project using command prompt?

-
Image
  How to create React project using command prompt? Ans :- firstly you have to install node js and npm in your system after after that follow these steps:- Step 1:- Open command prompt and for create project write  npx create-next-app Step 2:- Now it will say to write your Project name. Step 3 :- Now write your project name as per your choice. Step 4 :- Now it will ask what is your needs to create a project   Step 5 :- Now you can see dependencies are Installed as shown in below image Step 6 :- Now use this command for change the directory Step 7 :- Now you can see below directory is changed Step 8 :- Now for open the project in Vs code use this command  code . Step 9 :- Now you can see your project is directly opened in Visual Studio Code
Read more