This document discusses the basic features of object-oriented programming (OOP) and Java. It defines OOP as a programming paradigm based on modeling real-world entities as objects that have attributes and behaviors. The key features of OOP discussed are: classes, objects, inheritance, polymorphism, abstraction, and encapsulation. Classes are logical entities that define objects of similar types. Inheritance allows classes to acquire properties of other classes. Polymorphism means an operation can exhibit different behaviors depending on the data types used. Abstraction hides complexity and only represents essential features. Encapsulation binds data and methods into a single unit.

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2. Name
University Roll No. : 3 4 0 0 1 2 2 2 0 1 6
Registration No. : 2 2 3 4 0 1 0 1 0 0 1 0
BCA
Semester : 3rd
Subject : Object Oriented Programming
Subject Code : B C A C 3 0 1
Session : 2 0 2 2 - 2 0 2 5

3. System.out.print(“Lets begin”) ;
OOP Paradigm & Basic Features ofOOPs
Presented by –

4. Introduction
The Object-Oriented Programming
Paradigm is a programming paradigm based on the
concept of “Objects”. It is one of the most popular
programming paradigms, and Java is a prominent object-
oriented programming language.
The main idea behind Object-Oriented
Programming (OOP) is to model real-world
entities, concepts, or systems as objects that have
attributes (data) and behaviors (methods). It
follows bottom – up approach. In OOPs the
priority of data is higher than methods.
A
B C
Data

5. Object-Oriented Programming is a methodology or
paradigm to design a program using classes and objects. It
simplifies software development and maintenance by providing
some concepts. There are some basic features of OOPs. Those
are:
1
2
3
4
5
Objects
Class
Inheritance
Polymorphism
6
Abstraction
Encapsulatio
n
Apart from these, there’re other features &
terms also available, but I’ll discuss these 6 features.

6. Class
Any entity that has state and behavior is known as an
object. For example, a chair, pen, table, keyboard, bike, etc. It can
be physical or logical.
An Object can be defined as an instance of a class. An
object contains an address and takes up some space in memory.
Objects can communicate without knowing the details of each
other's data or code.
Class is a Collection of objects of similar types. It is a logical
entity. Once a class has been defined we can create any number of
objects belonging to that class.
fruit
Mango
Apple Grapes Orange
Banana
Ex: fruit Apple;
Here object Apple is created which belong to the class fruit.
Object

7. It is the process by which object of one class acquire the
properties or features of objects of another class. The concept of
inheritance provides the idea of reusability means we can add
additional features to an existing class without modifying it.
Inheritance
Polymorphism
Android 10
+ New
Android 11
Android 10
+ New
Android 12
Android 11
Update
Update
The Greek term “ Polymorphism ” means ability to take
more than one form. An operation may exhibit different
behaviours in different instances. The behaviour depends upon
the types of data used in the operation.
Polymorphism in compile time - • Operator Overloading
• Function Overloading
Polymorphism in run time - • Operator Overriding
• Function Overriding
DUCK
CAT
DOG
Quack
Meow
Woof

8. Abstractio
n
Hiding the complexity of program is called
Abstraction and only essential features are represented.
In short we can say that internal working is hidden.
For example – In a car, only gear lever is visible to
us but internal gear shifting mechanism is hiding for us. Visible gear lever Hidden internal gear
shifting mechanism
Encapsulatio
n
Binding or wrapping data & methods together
into a single unit are known as Encapsulation. For
example, a capsule, it is wrapped with different
medicines.
A java class is the example of encapsulation.
Java bean is the fully encapsulated class because all the
data members are private here.
Data Methods
Single Unit

9. System.out.print(“CONCLUSION”);
Java's basic features make it a
powerful and versatile programming
language. Its platform independence,
object-oriented nature, robustness, and rich
standard library contribute to its
widespread adoption and continued
relevance in the software development
industry. By making this presentation about
the basic features of java, I've learned many
new things about java which is very
informatic for me.
© Ayan Kamila | BCA – 22 |3rd Sem

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