Lecture01

Object Oriented Software Modeling and Design CE 350 Abdel-Karim Al-Tamimi, Ph.D. [email_address] http://faculty.yu.edu.jo/altamimi Al-Tamimi 2010 ©

Overview ,[object Object],[object Object],Al-Tamimi 2010 ©

Introduction to OOP ,[object Object],[object Object],Walking, Eating, Sleeping, … Eye-Color, Age, Height, … Attributes Behaviors

OOP Concepts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OOP vs. Procedural Programming Inputs Outputs object OOP Global Data Procedural Function 1 Function 2 Function 4 Function 3

Moving from Procedural to OOP ,[object Object],[object Object]

Procedural/Structured Programming ,[object Object],[object Object],[object Object],Input Process Output

Structured Programming Students Exams Courses Tutors Add Student Enter for Exams Check Exam Marks Issue Certificate Expel Student

Structured Programming ,[object Object],[object Object],[object Object]

How to Think in Terms of Objects ,[object Object],[object Object],[object Object]

Object to Object Communications MyObject AnotherObject Data Data MyFunction1 MyFunction2 Function_1 Function_2

Object to Object Communications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Object to Object Communications

Interface vs. Implementation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Interface vs. Implementation Student Age, GPA, … +getAge():integer +admit():void +expel():void +getFullName():string attributes methods

How to determine the minimum interface possible ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Determining the Class’s Environment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Concept of Scope ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],public class Employee{ … static int Count; … }

Object Attributes vs. Class Attributes

Inheritance ,[object Object],[object Object],[object Object]

Multiple Inheritance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Polymorphism ,[object Object],[object Object],[object Object],[object Object]

Polymorphism Al-Tamimi 2010 © +ReturnArea():double Shape +ReturnArea():double Circle +ReturnArea():double Square Area = Length^2 Area =   Radius^2 Returns a double value

Polymorphism Al-Tamimi 2010 © +GetArea(Shape) MainClass Will call Shape.ReturnArea() Area = Length^2 Area =   Radius^2 If shape is Circle If shape is Square

Constructors ,[object Object],[object Object],[object Object],public Student(int StudentNumber) { /* Implementation Code */ } ... Student BestStudent = new Student(1234); ...

Constructors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Constructors ,[object Object],[object Object],[object Object],[object Object],Student Age, GPA, … +Student: +getAge:integer +admit:void +expel:void +getFullName:string

Error Handling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exception Handling ,[object Object],[object Object],try { // potential risky code } catch( Exception object) { // how to solve the exception // can not solve it, throw an exception }

Composition ,[object Object],[object Object]

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