Addison Wesley - Micro JAVA Game Development (2002).pdf - Java - musli_com

Publisher : Addison Wesley

Pub Date : April 18, 2002

ISBN : 0-672-32342-7

Pages : 576

Table of

Contents

Wireless games are always on and always with you, and can reach a more massive

audience than any other gaming platform in history. No programming language is as

suited for micro games as Java 2 Micro Edition (J2ME).

Micro Java Game Development is your step-by-step guide to creating games for devices

that support J2ME/MIDP. The material covers a full range of topics, from a tour of all

available micro devices (PDAs, cell phones, and pagers) to a discussion of software

standards that support J2ME (WAP, SMS, i-mode, and wireless enhancements such as

Bluetooth) to an overview of J2ME extensions (Siemens Game API, NTT DoCoMo I-

Appli). Chapter by chapter, this book will guide you through the development of Micro

Racer, a professional-level game.

Micro Java™ Game Development

By David Fox , Roman Verhosek

Brought to you by ownSky!!

Table of Content

Table of Content .................................................................................................................. i

Copyright ............................................................................................................................... i

Trademarks ...................................................................................................................... i

Warning and Disclaimer ................................................................................................. i

Credits .............................................................................................................................. ii

Dedication ...................................................................................................................... iii

About the Author ................................................................................................................ iii

Acknowledgments ............................................................................................................. iii

Chapter 1. Introduction (or Everything I Wanted to Know About Micro Java Gaming

But Was Afraid to Ask) ....................................................................................................... 1

A New Era of Gaming .................................................................................................... 1

This Book's Mission ....................................................................................................... 3

A Bit About Game Design ............................................................................................. 6

Show Me the Money: Micro Game Business Models ............................................. 16

Summary ....................................................................................................................... 18

Part I: Small Devices ................................................................................................19

Chapter 2. The Mobile World .......................................................................................... 20

A New Era of Gaming .................................................................................................. 20

High-End Java Devices: Set-Top Boxes, Phones, Consoles ................................ 22

Personal Digital Assistants (PDAs) ........................................................................... 24

Mobile Phones and Pagers ........................................................................................ 31

Low-End Java Devices: Smart Cards and Embedded Chips ................................ 40

Summary ....................................................................................................................... 41

Chapter 3. Big Games, Small Screens ......................................................................... 42

Your Competition ......................................................................................................... 42

WAP Games ................................................................................................................. 43

i-mode Games .............................................................................................................. 54

SMS Games .................................................................................................................. 55

J2ME MIDP Games ..................................................................................................... 57

J2ME Palm Games ...................................................................................................... 65

iAppli Games ................................................................................................................. 67

What Are You Waiting For? ........................................................................................ 74

Part II: Before, Between, and Beyond J2ME ........................................................75

Chapter 4. Wireless Standards: How Data Goes To And Fro ................................... 76

Wireless Networks ....................................................................................................... 76

The Wireless Application Protocol (WAP) ................................................................ 78

Server-Side WAP ......................................................................................................... 95

Handheld Device Markup Language (HDML) ........................................................ 102

WAP 2.0 and xHTML Basic ...................................................................................... 105

Summary ..................................................................................................................... 106

Chapter 5. Let's Talk: Instant Wireless Messaging ................................................... 107

Messaging And Gaming ............................................................................................ 107

Short Message Service (SMS) ................................................................................. 108

Actually Sending SMS Messages ............................................................................ 112

SMS and J2ME ........................................................................................................... 113

Multimedia Messaging Service (MMS) ................................................................... 115

Summary ..................................................................................................................... 117

Chapter 6. Wireless in Asia: i-mode and cHTML ...................................................... 118

Using i-mode ............................................................................................................... 118

Compact HTML (cHTML) .......................................................................................... 119

Development Tools .................................................................................................... 125

Testing and Emulators .............................................................................................. 125

Summary ..................................................................................................................... 128

Chapter 7. The Wireless Landscape ........................................................................... 129

Bluetooth ..................................................................................................................... 129

Mobile Positioning ...................................................................................................... 131

m-Commerce .............................................................................................................. 135

Voice and Telephony ................................................................................................. 137

Unified Messaging (UM) ............................................................................................ 138

Summary ..................................................................................................................... 138

Part III: The Java 2 Micro Edition ..........................................................................140

Chapter 8. J2ME Overview ........................................................................................... 141

The Trinity of Java Platforms .................................................................................... 141

It's a Small World After All ........................................................................................ 142

Profiles and Configurations ...................................................................................... 143

Connected in a Limited Way: The CLDC ............................................................... 147

The Mobile Profile ...................................................................................................... 148

Summary ..................................................................................................................... 149

Chapter 9. Creating a MIDlet ........................................................................................ 150

Command-Line MIDlet Development ...................................................................... 150

Development Environments ..................................................................................... 152

Lifecycle of a MIDlet .................................................................................................. 156

Displaying Stuff ........................................................................................................... 157

Menus and Commands ............................................................................................. 161

Creating Help and About Alert Screens .................................................................. 164

Global Properties ....................................................................................................... 168

Summary ..................................................................................................................... 169

Chapter 10. Making the Most of Limited Resources ................................................. 171

The Limitations ........................................................................................................... 171

Memory Limitations .................................................................................................... 172

Displays ....................................................................................................................... 174

Breaking Through the Limitations ............................................................................ 175

Summary ..................................................................................................................... 176

Chapter 11. Making the Most of It: Optimizations ..................................................... 177

A Limited World .......................................................................................................... 177

Making Code Optimal ................................................................................................ 177

Code Size Reductions ............................................................................................... 178

Speeding Up the Code .............................................................................................. 182

Using Less Memory ................................................................................................... 185

Power Consumption .................................................................................................. 187

Summary ..................................................................................................................... 187

Chapter 12. Multithreaded Game Programming ........................................................ 188

Threads ........................................................................................................................ 188

Extending the Thread Object .................................................................................. 189

Implementing the Runnable Interface ................................................................... 190

Thread Priorities ......................................................................................................... 192

Thread States ............................................................................................................. 192

Synchronizations and Deadlocks ............................................................................ 192

wait() and notify() ............................................................................................ 193

Timers .......................................................................................................................... 194

Making Threads Better .............................................................................................. 195

Summary ..................................................................................................................... 196

Part IV: Let the Games Begin! ..............................................................................198

Chapter 13. High-Level Graphical User Interfaces ................................................... 199

The Screen Class ..................................................................................................... 199

Forms and Alerts ........................................................................................................ 200

iii

Lists .............................................................................................................................. 200

Text Boxes .................................................................................................................. 204

Items ............................................................................................................................. 205

Tickers ......................................................................................................................... 212

Additional Libraries .................................................................................................... 212

Summary ..................................................................................................................... 213

Chapter 14. Working with Graphics: Low-Level Graphical User Interfaces .......... 214

The Canvas Class ..................................................................................................... 214

Painting on the Screen .............................................................................................. 217

Drawing Images ......................................................................................................... 223

Summary ..................................................................................................................... 226

Chapter 15. Entering the Land of Sprites ................................................................... 227

Sprites .......................................................................................................................... 227

Image Files .................................................................................................................. 231

Collision Detection ..................................................................................................... 233

Creating Child Sprites ............................................................................................... 235

Image Transparency .................................................................................................. 236

Summary ..................................................................................................................... 239

Chapter 16. Managing Your Sprites ............................................................................ 240

Networked Game Components ................................................................................ 240

Advanced Collision Detection .................................................................................. 242

The Sprite Manager ................................................................................................... 245

Summary ..................................................................................................................... 248

Chapter 17. Sprite Movement ....................................................................................... 249

Floating-Point in J2ME .............................................................................................. 249

Game Initialization ..................................................................................................... 255

Movement .................................................................................................................... 256

Piecing It All Together ............................................................................................... 258

Summary ..................................................................................................................... 261

Chapter 18. J2ME Audio Basics .................................................................................. 262

Sounds Are (Barely) Possible! ................................................................................. 262

Summary ..................................................................................................................... 263

Chapter 19. Be Persistent: MIDP Data Storage ........................................................ 265

RecordStore Overview .......................................................................................... 265

RecordStore in Practice ........................................................................................ 266

More RecordStore Joy .......................................................................................... 273

Summary ..................................................................................................................... 278

Chapter 20. Connecting Out: Wireless Networking .................................................. 279

J2ME Networking Overview ..................................................................................... 279

MIDP Networking ....................................................................................................... 281

Setting Up Your Game Server ................................................................................. 285

Data Format ................................................................................................................ 286

Making a Multiplayer Car Racing Game ................................................................. 289

Summary ..................................................................................................................... 315

Part V: J2ME Extensions .......................................................................................316

Chapter 21. PersonalJava, Connected Device Configuration, and Other Micro Java

Blends .............................................................................................................................. 317

Connected Device Configuration (CDC) ................................................................ 317

PersonalJava .............................................................................................................. 318

PDA Profile .................................................................................................................. 323

Java Game Profile ..................................................................................................... 324

The J2ME Multimedia Profile ................................................................................... 324

Summary ..................................................................................................................... 325

Chapter 22. iAppli: Micro Java with a Twist ................................................................ 326

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