Object-Oriented Programming Concepts - Study24x7
Social learning Network
study24x7

Default error msg

Login

New to Study24x7 ? Join Now
Already have an account? Login
googlePlay app_img

Object-Oriented Programming Concepts

Updated on 15 February 2022
study24x7
Java Object oriented programmi
7 min read 226 views
Updated on 15 February 2022
Share this article
Copy Link Link Copied
NAT Banner

OOP is a very important concept of programming languages like C++, Java, and Python. Before Object-Oriented Programming programs were treated as procedures. In Object-Oriented Programming, objects are the most important part of your program. Accessing and changing these objects to get results is the main point of Object-Oriented Programming. As the name suggests OOPs Programming language means a language that uses the OOPs concept. 

The main key concepts in OOPs are: 




Class




Modifiers- It defines the scope of a class. In Java Public and Default modifier is used before class.

Private and Protected modifiers can not be used with the class names

Example 1- 

//Default Modifier

class Test{ ... }


Example 2- 

//Public Modifier

public class Test{ ... }


Class Name- The class name should begin with capital letters (But it is not mandatory).


Example - 

class DemoClass { 

}


Body- In java, the class body should be surrounded with {}. 


Object




Behavior- It is basically represented by the method of an object. 


Entity- It is basically used to provide a unique name to an object and it enables one object to talk with other objects. 


Example:


public class Example_Object_Java { 

public static void main(String args[]) { 


//Object Creation(Here obj is a reference variable) Example_Object_Java obj=new Example_Object_Java(); 


}

}


Polymorphism- 




Types of Polymorphism in Java: 




Inheritance- 




Types of Inheritance in Java-




Encapsulation




Example:

class Encaps_Exa{ 

private int enc_var1;

private int enc_var2;


public void setA(int enc_var1) { 


this.enc_var1=enc_var1;

}

public void setB(int enc_var2

{ 

this.enc_var2=enc_var2;

}

public int getA(){ 

return enc_var1;

}

public int getB(){ 

return enc_var2;

}

}

public class Example

{ 

public static void main(String args[])

{ 

Encaps_Exa obj=new Encaps_Exa();

obj.setA(10); 

System.out.println(obj.getA());

obj.setB(20);

System.out.println(obj.getB()); 


}

}


Abstraction




In java, abstraction can be achieved in two ways- 



Example-

package Java_Test; 

abstract class Abs_Exm{

abstract void A1();

}

public class Abstract_Class_Imp extends Abs_Exm { 

void A1()

{ 

System.out.println("Abstract method implemented");

}

public static void main(String[] args) { 

// TODO Auto-generated method stub Abs_Exm abs=new Abstract_Class_Imp (); abs.A1(); 


} 

} 



Java Technologies BCA MCA
Like| 2 Comment
study24x7
Write a comment...
Trending Articles

Best Study timetable for class 8th students

By CBSE CLASS 8

HOW TO WRITE CERTIFICATE SECTION FOR CLASS XII SCHOOL PROJE...

By Edubabble LLP

Best topic ideas for class 7 Science projects

By CBSE CLASS 7

The best daily routine for class 8 students

By CBSE CLASS 8
Featured Courses
Related Posts

Check these related articles on Study24x7

What is strictfp keyword in Java
6 min read 5 views

This keyword is used to restrict the floating-point calculation in java and securing the same output while performing operations in the floating-point

Java Object oriented programmi

45 followers

Devlopers Items
7 min read 3 views

1. API "Application Programming Interface" - How computers and applications communicate with each other 2. Attribute Information about elements

Shivam Kumar

61 followers

Comparable vs Comparator
7 min read 69 views

In Java programming language, an interface is used to specify a behaviour that classes must implement. Java world offers us two such interfaces Compar

javalearning

86 followers

Skills Required for Web Developer
6 min read 3 views

The field of Information and technology is rising from the past few years. This is mainly because of the various achievements that we have gained by m

Web Development

7 followers

Java Strictfp Keyword
7 min read 8 views

strictfp is a keyword in java used for restricting floating-point calculations and ensuring the same result on every platform while performing operati

javalearning

86 followers

Object-Oriented Analysis and Design (OOAD)
6 min read 138 views

Techopedia Explains Object-Oriented Analysis and Design (OOAD) Software and computer application systems are incredibly complex concepts since there

Mukesh Kumar

119 followers

Top Advantages of Creating Your Own Software
23 min read 950 views

Custom software development is a key part of any business. By working with the right developers and by using the right tools, businesses can create cu

Kushal Dubal

1 followers

What a Java Developer does?
23 min read 9 views

JAVA is one of the highly demanded programming languages worldwide. The scope for this language is never-ending as all major applications and software

Java Object oriented programmi

45 followers

Share this article
Copy Link Link Copied