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Creating Web Applets with Java

Creating Web Applets with Java cwafmfi.htm

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(b)Creating Web Applets with Java™

David Gulbransen

Kenrick Rawlings

Sams.net Publishing

201 West 103rd Street, Indianapolis, Indiana 46290

(c)Copyright © 1996 by Sams.net Publishing

FIRST EDITION

All rights reserved. No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. Although every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. For information, address Sams.net Publishing, 201 W. 103rd St., Indianapolis, IN 46290.


International Standard Book Number: 1-57521-070-3

Library of Congress Catalog Card Number: 95-072940

99 — 98 — 97 — 96 —————————4 — 3 — 2 — 1

Interpretation of the printing code: the rightmost double-digit number is the year of the book's printing; the rightmost single-digit, the number of the book's printing. For example, a printing code of 96-1 shows that the first printing of the book occurred in 1996.

Printed in the United States of America

All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Sams.net Publishing cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark.

Java is a trademark of Sun Microsystems, Inc.

President, Sams Publishing:

Richard K. Swadley

Publishing Manager:

Mark Taber

Managing Editor:

Cindy Morrow

Marketing Manager:

John Pierce

Assistant Marketing Manager:

Kristina Perry

Acquisitions Editor

Beverly Eppink

Development Editor

Fran Hatton

Software Development Specialist

Merle Newlon

Production/Copy Editor

Heather Stith

Technical Reviewer

Sue Charlesworth

Editorial Coordinator

Bill Whitmer

Technical Edit Coordinator

Lynette Quinn

Resource Coordinator

Deborah Frisby

Formatter

Frank Sinclair

Editorial Assistants

Carol Ackerman
Andi Richter
Rhonda Tinch-Mize

Cover Designer

Jason Grisham

Book Designer

Gary Adair

Copy Writer

Peter Fuller

Production Team Supervisor

Brad Chinn

(b)Overview

Introduction

I. Introduction to Java

1 What Is Java?

2 Uses and Restrictions of Java

II. Using Java

3 Java Browsers

4 Java's Capabilities

III. Adding Applets to Your Web Pages

5 Finding and Using Applets

6 Java-Enhanced Page Design

IV. Learning to Program Java

7 The Java Developer's Kit

8 Speaking Java: Java Syntax

9 Java Objects

V. Applet Programming

10 Applet Structure and Design

11 Building a User Interface

VI. Programming Complete Applets

12 The TickerTape Applet

13 The SlideShow Applet

Glossary of Terms

A Java Resources on the Net

B JavaScript and Java Language Reference

C 50 Useful Java Applets

D What's on the CD-ROM

Index

(b)Dedication

To Stephanie, for your love and support.

And to my father, for never losing faith in me.

David Gulbransen

To my father, for always being there.

Ken Rawlings

(b)Acknowledgments

Thanks to Andy Granger, for putting up with us. Thanks to Jim Causey, for putting up with us. Thanks to the Dynamic Duo, for putting up with us. Paul, Clarence, and Alabama, thanks for the CDs! Thanks to our families: the Gulbransen’s, the Berlin’s, the Rawlings’, the Moreford’s, and the McKee’s (Whew!).

Fran Hatton: Thanks! Thanks! Thanks! Thanks to Beverly Eppink, for the opportunity. Thanks to Dan Friedman, for showing that programming is more than just coding. Thanks also to Mark Lynch, Mark Tabor, and John December.

Thanks also to the Java Development Team, Sun Microsystems/JavaSoft, the ACCESS MicroCenter at Indiana University, and the Henry Radford Hope School of Fine Arts.

(b)About the Authors

David Gulbransen (dgulbran@indiana.edu) is currently the Computing Specialist for the Indiana University school of Fine Arts. He is also a principal partner in Grey Associates, a Java software development and consulting firm. Occasionally, Dave likes to put down the mouse for a movie camera to pursue his hobby of cinematography. He wants Ken’s cats.

Ken Rawlings (krawling@bluemarble.net) is currently employed at Indiana University as a software specialist at the ACCESS MicroCenter. He is also the Principal Software Architect for Grey Associates. In his copious amounts of spare time, Ken enjoys coding Scheme, coding Delphi, and listening to the soulful sounds of James Brown. He has two very popular cats.

(c)Contributing Authors

Billy Barron (billy@metronet.com) is currently the Network Services Manager for the University of Texas at Dallas and has a M.S. in Computer Science from the University of North Texas. He has written and technically reviewed such books as Tricks of the Internet Gurus, Education on the Internet, and Accessing Online Bibliographic Databases, as well as writing for periodicals.

Lay Wah Ooi (ooi@pobox.com) is a Computer Systems Engineer at Titan Spectrum Technologies. She graduated with a Computer Science degree from the University of North Texas. Lay Wah has contributed to Sams.net Publishing's Internet Unleashed and was a technical editor for Java Unleashed.

(b)Introduction

(c)What Is Java?

The question, “What is Java?” often only leads to more questions. Some people see Java as yet another bit of Internet hype. Others see Java as the future of the Internet and Internet applications. In truth, Java probably lies somewhere in between the extremes.

We hope that this book will begin to show you what Java is and what Java is not. Java is new, and Java is exciting. But Java is not the solution to every computing problem. Java is, quite simply, a new object-oriented programming language. With it comes the advantages of object-oriented programming and several other advantages that have been created through Java’s development process.

Java has been presented in many different ways by many different interests, but at the heart of all the Java hype is the language itself. Many people are confused or scared about what using Java means. What we hope to accomplish with this book is to provide you with some answers.

Part I takes a first look at Java. You’ll see where Java has been and where it’s headed. You’ll also take a look at what Java is capable of and hopefully you’ll finish these chapters as excited about Java as we are.

Part II approaches Java from a user’s standpoint. How do you view Java applets and applications? What are the limits of what Java can do? What are the real-world uses for Java, and when is Java not enough?

Part III discusses how you can start using Java applets in your own Web development projects. You'll learn where to find Java applets, how to add those applets to your Web pages, and how to customize them.

Once you’ve seen what Java can do and have started adding Java to your pages, Parts 4 and 5 will teach you more about the language and take you through the basics of programming your own applets.

Finally, Chapters 12 and 13 provide you with some real-world applet examples. You can see the development of two working applets from beginning to end. Use this part as a starting point for developing your own applets and as a general guide for programming.

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