Page 7 - DCAP308_OBJECT_ORIENTED_ANALYSIS_AND_DESIGN

Anil Sharma,Lovely Professional University
Unit 1: Introduction to Object Orientation

Unit 1: Introduction to Object Orientation Notes

CONTENTS
Objectives

Introduction
1.1 Object Orientation (OO)
1.1.1 Uses of Object Orientation

1.1.2 Why Object Orientation?
1.2 Object-oriented Development
1.3 Object-oriented Themes
1.3.1 Abstraction

1.3.2 Encapsulation
1.3.3 Combining Data and Behaviour

1.3.4 Sharing
1.3.5 Emphasis on Object Structure, not on Operation Implementation
1.4 Evidence for Usefulness of Object-oriented Development
1.5 Summary

1.6 Keywords
1.7 Review Questions
1.8 Further Readings

Objectives

After studying this unit, you will be able to:
Describe the concept of object orientation
Discuss the uses and need of object orientation

Explain the concept of object-oriented development
Identify object-oriented themes
Discuss the evidence for usefulness of object-oriented development

Introduction

Object-oriented Analysis and Design (OOAD) is a software engineering model which makes use
of objects, classes, state, methods and behavior concepts to analyze and demonstrate system
structure, functional needs and behavior. While object-oriented analysis emphasizes the things
that a system actually does, the object oriented design is concerned with the manner in which the
system does it. One thing that you must keep in mind is that the object oriented system will
always be comprised of objects. The behavior for the system is a result for the connection that is
made with the objects. Connections between objects will require them to send out messages to

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