CS3342 Lecture 2

Object-Oriented Programming Fundamental - Part 1

Object: can be quantified to mean one specific item - is an entity that has a state and a set of operations on that state    

Class: represent all objects of the same kind - serves as a template for creating objects

OO Programming has become the standard programming methodology for software engineers.

OO Programming is a software programming paradigm using “objects”, with instances of a class.

In OO programming, you would design the program with the data parts in mind, contextual information rather than procedures.

 

Advantages of OO Paradigm

• Easier to maintain. Objects may be understood as stand-alone entities.
• Reuse: Objects are potentially reusable components.
• For some systems, there may be an obvious mapping from real-world entities to system objects.

 

 

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Software development Process

Software Engineering Process

 

Software process

• A series of predictable steps, road maps, that help us to create a timely, and high-quality result.
• The road map defines tasks or activities that take place during the process. 

　　

• A process defines who is responsible for: What? When? How? To reach a goal
• Process defines tasks and activities within a schedule 

 

Software Process Model(Life Circle)

A software process model  

• is an abstract representation of a process  
• it describes a process  
• guides the software development team  
• with a set of key activities  

All process models have phases  (e.g: design phase, test phase) and each phase has 3 components:

• Set of activities - define, design, implement, test and maintain  
• Set of deliverables - What to produce  
• Quality control measures - What to use to evaluate/assess deliverables 

 

 

1. Linear - Waterfall Model

 

2. Incremental 

2.1 Incremental Model

2.2. The Rapid Application Development (RAD) Model

 

3. Evolutionary 

3.1 Protoyping Model

3.2 Spiral Model

3.3 Concurrent Engineering Model

 

4. Other - Component based software engineering (CBSE)

Example1 - 

Example2 -  QR code Component - Follow the component's API for method calls