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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
 Supplementary Slides forSupplementary Slides for Software Engineering:Software Engineering:
A Practitioner's Approach, 5/eA Practitioner's Approach, 5/e
copyright © 1996, 2001
R.S. Pressman & Associates, Inc.
For University Use Only May be reproduced ONLY for student use at the university level
when used in conjunction withSoftware Engineering: A Practitioner's Approach. Any other reproduction or use is expressly prohibited.
 
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
Chapter 20Chapter 20 Object-Oriented ConceptsObject-Oriented Concepts
and Principlesand Principles
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
The OO Process ModelThe OO Process Model
Customer Communication
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
The OO MindsetThe OO Mindset
problem domainproblem domain
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
Key ConceptsKey Concepts
•objectsobjects  – attributesattributes  – methodsmethods  – encapsulationencapsulation  – polymorphismpolymorphism
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
ClassesClasses •object-oriented thinking begins with theobject-oriented thinking begins with the
definition of a class often defined as:definition of a class often defined as:  –  templatetemplate
 –  generalized descriptiongeneralized description
 –  ““blueprint” ... describing a collection of similarblueprint” ... describing a collection of similar itemsitems
•a metaclass (also called a superclass)a metaclass (also called a superclass) is a collection of classesis a collection of classes
 
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
Building a ClassBuilding a Class class name
attributes:
operations:
attributes:
operations
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
What is a Class?What is a Class?
external entities
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
Encapsulation/HidinEncapsulation/Hidin ggThe object encapsulates
both data and the logical procedures required to manipulate the data
 Achieves “information hiding”
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
Class HierarchyClass Hierarchy
chairtable desk "chable"
instances of chair
 
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
MethodsMethods (a.k.a. Operations, Services)(a.k.a. Operations, Services)
 
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These courseware materials are to be used in conjunction withSoftware Engineering: A Practitioner’s Approach,  5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001
MessagesMessages sender object