advertisement
javaboutique
Search Tips
Articles  |   Tutorials  |   Reviews  |   Tools  |   by Category  |   by Date  |   by Name  |   Submit  |   Source  |   Forums  |  
javaboutique
Browse DevX


Partners & Affiliates


advertisement


Reviews : Java Books :
Beginning Java Objects : Chapters 2 and 3

Title: Beginning Java Objects
ISBN: 1861004176
US Price: $ 39.99
Canadian Price:
C$ 59.95
UK Price: £ 28.99
Publication Date: November 2000
Pages: 800
© Wrox Press Limited, US and UK.

Beginning Java Objects: Chapter 3
Objects and Classes

Instantiation

A class definition may be thought of as a template for creating software objects — a 'cookie cutter' used to:
  • Stamp out a prescribed data structure in memory to house the attributes of a new object.
  • Associate a certain set of behaviors with that object.
The term instantiation is used to refer to the process by which an object is created/constructed based upon a class definition. From a single class definition — for example, Student — we create many objects/instances of the class, in the same way that we use a single cookie cutter to make many cookies. Another way to refer to an object, then, is as an instance of a particular class. We'll talk about the physical process of instantiating objects as it occurs in Java in a bit more detail later in this chapter. Classes may be differentiated from objects, then, as follows:
  • A class defines the attributes — names and data types — that all objects belonging to the class must possess, and the methods that all objects belonging to the class must be able to perform, and can be thought of as an empty template.
  • An object, on the other hand, is a filled-in template to which attribute values have been provided.
image 9

image 10




How to Add Java Applets to Your Site

New on the Java Boutique:

New Review:

Time Management Made Easy with the Quartz Enterprise Job Scheduler
Why not just use the Java timer API? This open source scheduling API boasts simplicity, ease-of-integration, a well-rounded feature set, and it's free!

New Applet:

Reverse Complement
Reverse Complement is a simple applet that converts DNA or RNA sequences into three useful formats.

Elsewhere on internet.com:

WebDeveloper Java
Lots of Java information on webdeveloper.com

WDVL Java
Thorough Java resource at the Web Developer's Virtual Library.

ScriptSearch Java
Hundreds of free Java code files to download.

jGuru: Your View of the Java Universe
Customizable portal with online training, FAQs, regular news updates, and tutorials.

 Avaya Developer Showcase
 MSDN Spotlight
 PHP for Windows Showcase
XML error: undefined entity at line 34
advertisement
Receive Articles via our XML/RSS feed
Receive Articles via our XML/RSS feed

JavaBytes
Internet Cyclone
This powerful, easy-to-use, internet optimizer is for Windows 95, 98, ME, NT, 2000 and XP. It's designed to automatically optimize your Windows settings, boosting your Internet connection up to 200%.

IBM Brings Developers Into the Cloud
Apache at 10: You Can't Buy Us
Microsoft's CodePlex Foundation Moving Forward
Apple Claims 100,000 Apps, Google Analyzes Them
Nokia Latest to Play Opera Mobile 10 Browser
PayPal Opens Up Payment Platform to Devs
Ubuntu Linux 9.10 'Karmic Koala' Starts Its Climb
IBM Links Rational Developer Tools, Tivoli Apps
Libraries Give Vista Apps a Windows 7 Look
Ubuntu: The 'Default Alternative' to Windows?

Delivering Web-based Embedded Fonts in CSS 3
Adobe Helps PHP Developers Create Rich Internet Applications
Java Developers Finding a Home at Adobe Flex
Virtualization Delivers a Dynamic Infrastructure
Consuming XML Web Services in iPhone Applications
Build a More Agile Business with IBM
POJO-Based Solutions for LDAP Access: One Good, One Better
IBM Offers Enhanced Measurement and Management for Energy Usage
IBM Helps Transformation to an Information-Based Enterprise
Top Five Touch UI-Related Design Guidelines

Advertising Info  |   Member Services  |   Contact Us  |   Help  |   Feedback  |   Site Map  |   Network Map  |   About

internet.commediabistro.comJusttechjobs.comGraphics.com

Search:

WebMediaBrands Corporate Info

Legal Notices, Licensing, Reprints, Permissions, Privacy Policy.
Advertise | Newsletters | Shopping | E-mail Offers | Freelance Jobs

Solutions

Whitepapers and eBooks

Adobe Article: Adobe Helps PHP Developers Create Rich Internet Applications
Adobe Article: Java Developers Finding a Home at Adobe Flex
IBM Articles: A Smarter Business Needs Smarter Technology
Intel Xeon Processor Increases Server Efficiency and Capabilities
Intel Tech Brief: Automated Energy Efficiency for the Intelligent Enterprise
Oracle Whitepaper: Using Oracle In-Memory Database Cache to Accelerate the Oracle Database
Oracle Whitepapers - Innovation for IT Leaders
Avaya Article: Communication-Enabled Mashups--Empowering Both Business Owners and IT
 Internet.com eBook: IT Manager's Guide to Social Networking
Internet.com eBook: Get Ready for Windows 7
Microsoft Article: Expression Web 3--New Features for PHP Developers
Whitepapers: Manage Your Business Infrastracture with IBM
Whitepaper: Maximize Your Storage Investment with HP
Internet.com eBook: Becoming a Better Project Manager
Microsoft Article: Stress Free and Efficient Designer/Developer Collaboration
MORE WHITEPAPERS, EBOOKS, AND ARTICLES

Webcasts

Webcast: Connecting PHP to Microsoft Technologies
Video: Microsoft Partner Program Benefits
Video: Windows Azure Debugging Tips
SAP BusinessObjects Webcast: Unlock the Power of Reporting with Crystal Reports
 IBM Webcast: Speed Business Innovation with Reduced Cost and Risk
Video: Deploy Applications on Windows Azure
MORE WEBCASTS, PODCASTS, AND VIDEOS

Downloads and eKits

Downloads & Free Trials: Microsoft's New Efficiency Resource Center
Get the Windows 7 SDK
Free Trial: Red Gate SQL Backup Pro 6
 Iron Speed Designer Application Generator
MORE DOWNLOADS, EKITS, AND FREE TRIALS

Tutorials and Demos

Virtual Lab: Migrating PHP Applications
Enabling Web Slices and Accelerators with a PHP Site
Internet.com Hot List: Get the Inside Scoop on the Hottest IT and Developer Products
 All About Botnets
MORE TUTORIALS, DEMOS AND STEP-BY-STEP GUIDES