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://sayed.justetc.netsayed@justetc.net

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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: sayed@justetc.net (647-624-8509) Rafik: rafik@justetc.com (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)