<< Chapter < Page Chapter >> Page >
Learn how to use runtime polymorphism based on the ActionScript interface.
Click Interface01 to run this ActionScript program. (Click the "Back" button in your browser to return to this page.)

Table of contents

Preface

General

All references to ActionScript in this lesson are references toversion 3 or later.

This tutorial lesson is part of a continuing series of lessons dedicated to object-oriented programming (OOP) with ActionScript.

The three main characteristics of an object-oriented program

Object-oriented programs exhibit three main characteristics:

  • Encapsulation
  • Inheritance
  • Polymorphism

There are two different ways to implement polymorphism:

  • Polymorphism based on class inheritance
  • Polymorphism based on interface inheritance

I explained encapsulation, inheritance, and polymorphism based on class inheritance in previous lessons. (See Baldwin's ActionScript programming website .)

I will explain and illustrate polymorphism based on interface inheritance in this lesson.

Several ways to create and launch ActionScript programs

There are several ways to create and launch programs written in the ActionScript programming language. Many of the lessons in this series willuse Adobe Flex as the launch pad for the sample ActionScript programs.

An earlier lesson titled The Default Application Container provided information on how to get started programming with Adobe's Flex Builder 3. (See Baldwin's Flex programming website .) You should study that lesson before embarking on the lessons in this series.

Some understanding of Flex MXML will be required

I also recommend that you study all of the lessons on Baldwin's Flex programming website in parallel with your study of these ActionScript lessons. Eventually you will probably need to understand both ActionScript and Flex andthe relationships that exist between them in order to become a successful ActionScript programmer.

Will emphasize ActionScript code

It is often possible to use either ActionScript code or Flex MXML code to achieve the same result. Insofar as this series of lessons is concerned,the emphasis will be on ActionScript code even in those cases where Flex MXML code may be a suitable alternative.

Viewing tip

I recommend that you open another copy of this document in a separate browser window and use the following links to easily find and view the figuresand listings while you are reading about them.

Figures

  • Figure 1 . Project file structure.
  • Figure 2 . Program output at startup.
  • Figure 3 . Output after clicking the Area Button for circle.
  • Figure 4 . Output after clicking the Area Button for rectangle.

Listings

  • Listing 1 . Beginning of the class named Driver.
  • Listing 2 . Beginning of the constructor for the Driver class.
  • Listing 3 . The remainder of the constructor for the Driver class.
  • Listing 4 . The getRandomValues method.
  • Listing 5 . The event handler method named areaButtonHandler.
  • Listing 6 . The other two click event handler methods.
  • Listing 7 . The interface named IArea.
  • Listing 8 . The interface named IVolume.
  • Listing 9 . The class named MyCircle.
  • Listing 10 . Listing for the file named Interface01.mxml.
  • Listing 11 . Listing for the file named Driver.as.
  • Listing 12 . Listing for the file named IArea.as.
  • Listing 13 . Listing for the file named IVolume.as.
  • Listing 14 . Listing for the file named ICircumference.as.
  • Listing 15 . Listing for the file named MyCircle.as.
  • Listing 16 . Listing for the file named MyRectangle.as.

Questions & Answers

the diagram of the digestive system
Assiatu Reply
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Object-oriented programming (oop) with actionscript. OpenStax CNX. Jun 04, 2010 Download for free at http://cnx.org/content/col11202/1.19
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Object-oriented programming (oop) with actionscript' conversation and receive update notifications?

Ask