M.Sc IT 2nd Semester University of Sargodha Lyallpur Campus, Faisalabad

1. CMP-2123-Object
Oriented Programming
Lecture 1.1
By
Abrar Ahmad
Abrar.ahmad14@ce.ceme.edu.pk

2. Course Introduction
•Prerequisites
•Programming Fundamentals
•Course Objective
•This course aims to develop students’ Objects
oriented programming skills.
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3. Course Introduction
•Textbook
•Java Programming From the Ground Up by Ralph
Bravaco and Shai Simonson, McGraw-Hill Higher
Education New York, 2010, ISBN: 978-0-07-352335-4
•Ivor Horton’s Beginning Java by Ivor Horton, John
Wiley & Sons, Inc. 7th Edition, 2011, ISBN: 978-0-470-
40414-0
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4. Course Introduction
•Reference Material
•Java TM Programming by Joycee Farrell,6th Edition,
Cengage Learning, 2012, ISBN-13: 978-1-111-
52944-4
•Java TM How to Program By Paul Deitel and Harvery
Deitel, Pearson,9th Edition, 2012, ISBN-13: 978-0-
13-257566-9
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5. Course Overview
• Objects and Classes, Abstraction Encapsulation
• Final Classes, Nested and Inner Classes
• Inheritance, Abstract Classes, Concrete Classes,
Inheritance and Encapsulation
• The is-a Relationship, Inheritance via Abstract Classes,
Extending the Hierarchy, Upcasting and Downcasting,
Interfaces
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6. Course Overview
• Composition, has-a Relationship
• Polymorphism
• Dynamic Binding
• Interfaces and Polymorphism
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7. Course Overview
•The Wrapper Classes, Boxing and Unboxing Packages
•Exceptions and Exception Handling
•File System and paths, File Directory Handling and
Manipulation, Input/Output Streams, Reading Binary Data,
Writing Binary Data, Writing Text, reading text, Logging
with PrintStream, Random Access Files, Serialization
•Collection for-each Loop
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8. Course Overview
• GUI Concepts, Components and Containers, Abstract
Windows Toolkit and Swing, Windows and Frames, Layout
Managers, Panels
• Event-Driven Programming, The Delegation Event Model
• Event Classes, Mouse Events, Keyboard Events, Using Actions
• Component and Jcomponent, Buttons, Labels, Text Fields,
Text Areas, Dialog Boxes, Checkboxes, and Radio Buttons,
Menus, Jslider, JTabbedPane
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9. What is OOP
• Object-oriented programming (OOP) is a programming
language model organized around objects rather than
"actions" and data rather than logic.
• Historically, a program has been viewed as a logical
procedure that
• takes input data
• processes it
• produces output data.
• The programming challenge was seen as how to write the
logic, not how to define the data.
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10. What is OOP
• Object-oriented programming takes the view that what we really
care about are the objects we want to manipulate rather than
the logic required to manipulate them.
• Example
• Human Being
• Name
• Height
• Age
• Gender
• Race
• etc
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11. What is OOP
•Object Oriented Programming is an engineering
approach for building software systems
•Based on the concepts of
•Classes
•Objects
That are used for modeling the real world entities.
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12. Why OOP
•Better suited for team development
•Facilitate utilizing and creating reusable components.
•Easier GUI Programming
•Easier Software maintenance
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13. Principles of OOP
•Inheritance
•Abstraction
•Encapsulation
•Polymorphism
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14. About
• Simula is considered as the first object-oriented
programming language. The programming paradigm
where everything is represented as an object, is
known as truly object-oriented programming
language.
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15. OOP
• Object means a real word entity such as pen, chair, table etc. Object-
Oriented Programming is a methodology or paradigm to design a
program using classes and objects. It simplifies the software
development and maintenance by providing some concepts:
• Object
• Class
• Inheritance
• Polymorphism
• Abstraction
• Encapsulation
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16. Object:
Any entity that has state and behavior is known as an
object. For example: chair, pen, table, keyboard, bike
etc. It can be physical and logical. 16arbabwaseer@gmail.com

17. • Syntax to declare a class:
•Class
• Collection of objects is called class. It is a logical entity.
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18. Simple Example of Object and Class
• In this example, we have created a Student class that have two data
members id and name. We are creating the object of the Student
class by new keyword and printing the objects value.
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21. •Polymorphism
• When one task is performed by different ways i.e. known as
polymorphism. For example: to convince the customer
differently, to draw something e.g. shape or rectangle etc.
• In java, we use method overloading and method overriding to
achieve polymorphism.
• Another example can be to speak something e.g. cat speaks
meaw, dog barks woof etc.
•Inheritance
• When one object acquires all the properties and behaviors
of parent object i.e. known as inheritance. It provides code
reusability. It is used to achieve runtime polymorphism.
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23. • Abstraction
• Hiding internal details and showing functionality is known as
abstraction. For example: phone call, we don't know the internal
processing.
• In java, we use abstract class and interface to achieve abstraction.
•Encapsulation
• Binding (or wrapping) code and data together into a single
unit is known as encapsulation. For example: 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.
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25. Advantage of OOPs over Procedure-
oriented programming language
• OOPs makes development and maintenance easier where as
in Procedure-oriented programming language it is not easy
to manage if code grows as project size grows.
• OOPs provides data hiding whereas in Procedure-oriented
programming language a global data can be accessed from
anywhere.
• OOPs provides ability to simulate real-world event much
more effectively. We can provide the solution of real word
problem if we are using the Object-Oriented Programming
language. 25arbabwaseer@gmail.com

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27. •What is difference between object-oriented
programming language and object-based
programming language?
• Object based programming language follows all the
features of OOPs except Inheritance. JavaScript and
VBScript are examples of object based
programming languages.
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