Chapter3_1-ClassesAndObjects

Chapter3_1-ClassesAndObjects - Chapter3 Introduction to...

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Classes and Objects: Definitions Chapter3: Introduction to Classes and Objects
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Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 2 Objectives What is an object What is a class UML representation of a class Objects and Instance variables Primitive types and reference type Practical Organization
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Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 3 Let’s consider the following Let’s consider two doors D1 and D2. We aim to develop an application monitoring these doors. What actions may be applied on these doors: Open and close .
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Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 4 Procedural Programming In Procedural programming: The doors are considered as passive entities of the real world with no interaction with their environments. Two robots (procedures) with specific roles are created: one for Opening doors, the other for closing. ) Open(doorId) ) Close(doorId ) In order to open or to close a given door, the user should: Order the appropriate robot to perform the required action on the specified door. Open(d); or Close(d); where d is either D1 or D2
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Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 5 Object Oriented Programming In Object-Oriented programming: The doors are considered as active entities of the real world capable of interacting with their environments. Each one of them offers two services open and close. ) Open() ) Close() In order to open or to close a door, the user should: Order the appropriate door to perform the required action.
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