Sayed Ahmed BSc. Engineering in Computer Science and Engineering, BUET, Bangladesh MSc. in Computer...
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OBJECT ORIENTED DESIGN PRINCIPLES Sayed Ahmed BSc. Engineering in Computer Science and Engineering, BUET, Bangladesh MSc. in Computer Science, University of Manitoba, Canada Owner/Architect/Developer Justetc (Just et cetera) Technologies, Canada http://www.justetc.net http://sayed.justetc.net [email protected]
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Transcript of Sayed Ahmed BSc. Engineering in Computer Science and Engineering, BUET, Bangladesh MSc. in Computer...
OBJECT ORIENTED DESIGN PRINCIPLES
Sayed AhmedBSc. Engineering in Computer Science and Engineering, BUET, Bangladesh
MSc. in Computer Science, University of Manitoba, Canada
Owner/Architect/DeveloperJustetc (Just et cetera) Technologies, Canadahttp://www.justetc.nethttp://[email protected]
FREE TRAINING BY JUSTETC
Training and Education in Bangla: http://Bangla.SaLearningSchool.com
Training and Education in English: http://www.SaLearningSchool.com http://English.SaLearningSchool.com
Ask questions and get answers http://Ask.JustEtc.net
Offline IT Training: http://University.JustEtc.net
OBJECT ORIENTED DESIGN PRINCIPLES Minimize The Accessibility of Classes
and Members Favor Composition Over Inheritance Program To An Interface, Not An
Implementation The Open-Closed Principle:
Software Entities Should Be Open For Extension, Yet Closed For Modification
OBJECT ORIENTED DESIGN PRINCIPLES The Single Choice Principle:
Whenever a software system must support a set of alternatives, ideally only one class in the system knows the entire set of Alternatives
The Liskov Substitution Principle: Functions That Use References To Base
(Super) Classes Must Be Able To Use Objects Of Derived (Sub) Classes Without Knowing It
REFERENCES
I will use the following resource to demonstrate the principles
http://userpages.umbc.edu/~tarr/dp/lectures/OOPrinciples.pdf
PROGRAM TO AN INTERFACE
http://stackoverflow.com/questions/383947/what-does-it-mean-to-program-to-an-interface List myList = new ArrayList(); //
programming to the List interface instead of
ArrayList myList = new ArrayList(); // this is bad
OBJECT ORIENTED ANALYSIS
Must check http://www.salearningschool.com/displayAr
ticle.php?table=Articles&articleID=819&title=Object%20Oriented%20Analysis:%20Just%20an%20Overview
ADDRESSES
Trudelle Street, Toronto, Ontario, Canada
Shimultuly, Gazipur, Bangladesh Justetc Computers Habib Complex, 2nd Floor
Contact us Sayed: [email protected] (647-624-8509) Rafik: [email protected] (01942747702)
OUR SERVICES
I provide consulting under Justetc (Just et cetera) Technologies, Canada I provide consulting on
Software Development Web Development Software Engineering Software and Information Architecture Mobile Development Business Analysis
I have several years of professional experience in different areas of IT, Computer Science, and Software & Computer Engineering
My education and experience exposed me to many abstraction levels of computing; from the lowest level to the highest level (electronics, digital system design, computer networks, data communications, databases, software engineering, software development to web development)
