OOP using java (introduction) Lecturer: Omeed Mustafa Moham Da Vinci institute of Duhok-Iraq OOP using java

1. OOP - JAVA
Introduction to OOP using Java
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Department of Computer
PRO – GRADE 5
Lecturer. OMEED M. M

2. Table of contents
 What is OOP?
 Classes and Objects
 Types of the access specifies
 List of OOP Concepts in Java
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3. What is OOP?
OOP stand for Object-Oriented Programming
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.
Languages used in Object Oriented Programming:
Java, C++, C#, Python,
PHP, JavaScript, Ruby, Perl,
Objective-C, Dart, Swift, Scala
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4. Class and Object
What are Classes and Objects?
Classes and objects are the two main aspects of object-oriented
programming.
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5. Class and Object
Object
Objects have states and behaviors. Example: A dog has states - color,
name, breed as well as behaviors – wagging the tail, barking, eating.
An object is an instance of a class.
Everything is an object
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6. Class and Object
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7. Class and Object
Class
- Collection of objects is called class. It is a logical entity.
- A class can be defined as a template/blueprint that
describes the behavior/state that the object of its
type support.
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8. Class and Object
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9. Types of the access specifies
There 3 types of the access specifies
1. Public: accessible in all class in your application.
2. protected: accessible within the package in which it is defined
and in its subclass(es)(including subclasses declared outside the
package)
3. Private: accessible only within the class in which it is defined.
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10. List of OOP Concepts in Java
1. Abstraction
2. Encapsulation
3. Inheritance
4. Polymorphism
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11. Conclusion
The main idea behind Object Oriented Programming is simplicity,
code reusability, extendibility, and security. These are achieved
through Encapsulation, abstraction, inheritance, and polymorphism.
For a language to be classified as OOP, it must have these 4 OOP
blocks
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12. Any Questions ?
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