Florida Community College at Jacksonville - PowerPoint PPT Presentation

Loading...

PPT – Florida Community College at Jacksonville PowerPoint presentation | free to download - id: 448257-ODExZ



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Florida Community College at Jacksonville

Description:

Florida Community College at Jacksonville Object-Oriented Concepts Overview COP 2551 Object-Oriented Programming Spring,2003 Florida Community College at Jacksonville ... – PowerPoint PPT presentation

Number of Views:80
Avg rating:3.0/5.0
Slides: 11
Provided by: js9772
Learn more at: http://programmingplaza.com
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Florida Community College at Jacksonville


1
Florida Community College at Jacksonville
Object-Oriented Concepts Overview
COP 2551 Object-Oriented Programming Spring,20
03
2
Florida Community College at Jacksonville
  • Objective
  • Overview of Object Orientation
  • Object Attributes and Operations
  • Difference between an object and a class
  • 3 basic Object-oriented principles
    (Encapsulation, Inheritance and Polymorphism)
  • Reference Thinking in Java (Bruce Eckel)
  • Free download _at_http//www.BruceEckel.com

COP 2551 Object-Oriented Programming OO
Concepts Overview
2 of 10 slides
3
Florida Community College at Jacksonville
  • Overview of Object Orientation
  • Object orientation is a technique for system
    modeling, Object oriented analysis and design, or
    OOAD, attempts to describe a system as it exists
    in real life.
  • The system is modeled as a number of related
    objects that interact. Any system needs objects
    to do work. It asks its objects to do its work,
    just as you might ask objects in an online store
    to deliver goods to you and charge the cost to
    your credit card.
  • All objects have attributes (characteristics),
    this is sometimes referred to as state.
  • They also have operations (or methods), this is
    sometimes referred to as behavior.

3 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
4
Florida Community College at Jacksonville
  • Examples of Objects
  • Use an online store (such as amazon.com) as an
    example, the following things may consider as
    Objects
  • Book
  • Customer
  • Order

4 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
5
Florida Community College at Jacksonville
  • Object Attributes and Operations
  • Attributes know something (Attributes are often
    data, like order ID and customer ID for an Order
    object. Attributes can also be another object,
    such as the entire Customer object rather than
    just the customer ID.
  • Operations do something with what the attributes
    know, (Operations can be actions that the object
    does, often affecting its attributes.)

5 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
6
Florida Community College at Jacksonville
  • Difference Between Object And Class
  • A class is how you define an object. Classes are
    descriptive categories or templates. Book could
    be a class.
  • Objects are unique instances of classes. This
    Java Certification book that costs 59.99 with
    item ID 62467-B is an object of the Book class.

6 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
7
Florida Community College at Jacksonville
  • Difference Between Object And Class (continue)
  • The attributes and operations defined by a class
    are for its objects, not for itself. There is no
    concrete realization of the class Book, but there
    are Book objects, i.e. a class is a logical
    construct, an object has physical reality.
  • A class can be compared to a blueprint. Imagine
    you are in charge of building a housing
    development, with one housing blueprint. Each
    house in a development is shaped the same way,
    but some have brick or aluminum siding, some have
    custom paint colors inside and some are just
    white, and so on.

7 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
8
Florida Community College at Jacksonville
  • Object-oriented Principle Encapsulation
  • Encapsulation is the mechanism that binds
    together the code and the data it manipulates,
    and keeps both safe from outside interference and
    misuse.

A Class
Public variables and methods
Private variables and methods
Public variables is not recommended
8 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
9
Florida Community College at Jacksonville
  • Object-oriented Principle -
    Inheritance
  • Inheritance is the process by which one object
    acquires the properties of another object. By use
    of inheritance, an object need only define all of
    its characteristics that make it unique within
    its class, it can inherit its general attributes
    from its parent.

Account
Checking
Mortgage
Loan
9 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
10
Florida Community College at Jacksonville
  • Object-oriented Principle Polymorphism
  • Polymorphism(from Greek, meaningmany forms) is
    a feature that allows one interface to be used
    for a general class of actions, i.e. one
    interface, multiple methods.
  • Example Account.calculateInterest()

10 of 10 slides
COP 2551 Object-Oriented Programming OO
Concepts Overview
About PowerShow.com