Micro Java™ Game Development - Softcover

Fox, David; Verhovsek, Roman

Softcover

ISBN 10: 0672323427 ISBN 13: 9780672323423

Publisher: Addison-Wesley Professional, 2002

Synopsis

Micro Java Games Development explains game development for devices that support J2ME MIDP. The six parts cover a full range of topics, from a tour of all available micro-devices (Palms, cell phones and pagers), a discussion of software standards apart from J2ME (cell phones, messaging, I-mode and wireless enhancements such as Bluetooth), and available J2ME extensions (Siemans, Ericcson, Nokia), development tools and restrictions, to the creation of a meaty J2ME game!

About this title

About the Author

David Fox works for Next Game, Inc., creating Web and wirelessmultiplayer games. Prior to that, his design and development credits includeMichael Crichton's "Westworld 2000," Fox Interactive's"X-Files: Unauthorized Access," and PlayLink's real-time strategy"Citizen 01." He is the author of several best-selling books aboutInternet technologies, and his writing frequently appears in publications suchas Salon.com, Gamasutra, and Developer.com. David has presented topics in Javagaming at Sun Microsytem's JavaOne conference for the past three years, andhas been the winner of the Motorola-Nextel Developer Challenge for the past twoyears.

Roman Verhovsek is CEO and co-founder of Cocoasoft Ltd., where he isleading a team of J2ME developers. He holds a bachelor's degree inelectrical engineering from the University of Ljubljana, and is working on hismaster's degree of computer science. Since early 1996, he has focusedprimarily on Java technologies, and for last two years in particular onJava-enabled small devices. In 2001 he held a lecture on J2ME game developmentat the JavaOne conference. In his other life, Roman enjoys cooking,mountaineering, jogging, and traveling with his girlfriend, Lina.

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Excerpt. © Reprinted by permission. All rights reserved.

Everything I Wanted to Know About Micro Java Gaming But Was Afraid to Ask

A New Era of Gaming

Ah, games.

Games have almost a religious, ritual aspect to them. They allow people to enter together into a higher state of being, pushing skills to new limits and experiences to new heights. They allow ordinary people to experience extraordinary emotions--the emotions of the warrior, the king, the spy, and the lover--while remaining protected in a safe environment.

Now all this might sound like a bit of a heavy-handed way to describe Frogger, but it's fair to say that games transport us and amuse us in ways that no other form of entertainment can.

A Brief History of Games

Games have been with humanity since the beginning. A 5000-year-old Mancala-like game board, carved from stone, was recently unearthed in the Sahara. The game of Go, popular in Oriental countries, has reportedly been around since 2000 B.C. Backgammon-like games such as Tabula and Nard are talked about in ancient Roman scripts, and even in the Bible. And Tarot decks, initially used to help predict the future, evolved into today's Bicycle playing cards.

A decade or two ago, the only games that people spent much time with were professional sports, board games like Monopoly and Chess, paper and dice games such as Dungeons and Dragons, and card games like Poker or Hearts. Some games were for heavy money, some were bone-jarringly competitive, but most were just about good clean fun.

With the advent of computers, games entered a new era. Games became one of the main reasons many people brought these strange beige boxes called computers into their homes. Whether battling through a simple graphical tennis game such as Pong, or a rich, text-only world such as Zork, these were wholly new types of games that could be played anytime against a most formidable opponent: a game designer who had programmed your computer, long ago, showing it how to defeat you.

The arcade wave of the '70s and '80s, led by hits such as Pac-Man, captured the hearts and ate the quarters of millions of youths. Console systems such as the Magnavox Odyssey, the Atari 2600, Mattel Intellivision, and ColecoVision brought the fun of the arcade to the players' own living rooms. Then, in 1985, a box known as the Nintendo Entertainment System blew people away with stunning graphics and intricate gameworlds, typified by such hits as Super Mario Brothers.

Computer gaming entered a whole new stratum of mass popularity and acceptance with bestsellers such as Doom, followed by Quake, and later Tomb Raider. Clearly, ultra-realistic 3D worlds were a hit. The more a game made a player feel as if she were actually inside another reality, the better.Graphics became richer and richer as 3D cards and engines doubled in speed and performance with each passing year. Super Nintendo gave way to the Sony PlayStation, and currently the Nintendo GameCube faces off against the PlayStation 2, not to mention Microsoft's daunting new Xbox.

Multiplayer Mania

A funny thing happened on the way to virtual reality-ville. In the late '90s and early 2000s, with games like Ultima Online, Everquest, and Age of Empires II, not to mention the spread of casual game Web sites such as Pogo, Yahoo Games, and Microsoft's MSN Gaming Zone, it became clear that what mattered to a whole slew of gamers wasn't only the richness of graphics or the detail of blood and gore--but the presence of other, real people. Multiplayer gaming, long popular with the geek crowd, had entered the mainstream.

In a way, games had come full circle. Once again, games were serving a social purpose, becoming a way for two or more people to enter new worlds and test new skills together, relating to each other in entirely new ways.

Micro Devices, Micro Lifestyles

While multiplayer gaming continues to grow in popularity, another big paradigm shift is happening.

It's becoming harder and harder to find people who don't carry network-enabled embedded devices with them wherever they go. Whether it's a PDA such as a Palm device or iPaq, or a mobile phone such as those crafted by companies like Nokia or Motorola, people are getting used to connecting and communicating with each other anytime, anyplace, and anywhere.

Today, there are more than 600 million mobile-phone users worldwide. In the United States and Europe, mobile phone users generally tend to be affluent, educated, and they often have lots of time on their hands. The picture is different on different continents. In Africa, Asia, and South America the masses have flocked to mobile phones because land-line access and Internet service are too expensive.

According to the Yankee Group, people in the United States spend 50% more time commuting than in any other country. This is the perfect time to pull out a mobile phone and play some quick games.

Additionally, Datamonitor has researched people's game-playing behaviors in Asia, Europe, and the United States, and has concluded that most people like to play wireless games on evenings and weekends.

In the near future, we will likely see micro devices become even smaller and more specialized. Phones the size of earplugs, voice-activated assistants on wristwatches, and smart chips on credit cards are all becoming a reality.This is a continuation of the paradigm shift that began in the 1970s, with microcomputers taking the power away from huge, monolithic mainframes. Clearly, millions of small devices working together yields much more distributed power than one big, central device.

Unsurprisingly, games are keeping up and even helping to lead this paradigm. While it might seem silly to try to achieve a rich, meaningful immersion on a tiny 100Yen100 pixel screen, there's one thing mobile phone games give you that even the best consoles can't provide: They're always with you, and can be played anywhere you go. This not only means that games can now be more convenient, but wholly new types of games can be designed that take advantage of new lifestyles.

Enter Micro Java

The Java language, created by Sun Microsystems, is another example of a paradigm shift. As a language that had no pointers or complicated memory operations, was object-oriented, secure, and could run on most any browser or platform, application development suddenly opened up to the masses in a way that never seemed possible before. Java made it possible for millions of programmers to create quality applications in record time and quantities.

The Java 2 Micro Edition (J2ME), or Micro Java, as we'll call it in this book, is an attempt to take the best aspects of Java and pare them down for smaller devices such as mobile phones; set-top boxes that add interactivity to television, pagers, handheld organizers and personal data assistants (PDAs); as well as embedded chips that you find in devices such as refrigerators, microwaves, "smart" credit cards, and automobiles.

Most every major mobile phone and handheld device manufacturer immediately realized the potential of J2ME: If Java were to be placed on the gadget, hundreds of thousands of developers would immediately be able to create applications and add value. Furthermore, because it's Java, a program written for one device would be able to run on another device with little or no modifications. That certainly makes more sense than trying to force developers to learn a native language and API in order to create programs for your phone.Seeing the opportunity for Java on the handset, almost every major mobile phone manufacturer joined with Sun to create something called the CLDC: The Connected, Limited Device Configuration, along with the MIDP: The Mobile Information Device Profile. In later chapters, we'll get into greater detail about what all these wacky acronyms really mean. But the point to remember here is that mobile phone manufacturers have embraced Java in a way that not even PC manufacturers and browser makers have. Java is clearly the future platform of choice for mobile devices, and an ideal platform for mobile games.

This Book's Mission

We have attempted to write the most in-depth guide showing you how to craft the most cutting-edge Micro Java games possible.

Whether you are a professional game designer hoping to expand your knowledge of various platforms, a game programmer who wants to port a game to a smaller device, a Micro Java enthusiast looking for a more entertaining book about more entertaining apps, or just a micro gamer hoping to catch a glimpse of what goes on behind the scenes, this book is for you.

The Game Plan

This book is divided into six sections:

Part I: Small Devices

The book begins with a tour of current Java-enabled devices, showing the full canvas upon which you'll be able to paint. These devices include powerful, full-featured computer systems, set-top television boxes, and tiny, smart credit cards.

Next, we'll look at the current state of micro gaming. We'll go on a whirlwind tour of some of the most popular and revolutionary games out there. Because most of these games are not written in Java, we'll try to distill the most successful element of these games so that you can take the best ideas and run with them.

Part II: Before, Between, and Beyond J2ME

In many cases, handheld games will not be written in Java alone. Rather, games will be built atop older mobile phone technologies. In the second section of this book we'll look at the technologies that surround and support J2ME gaming, such as the Wireless Application Protocol (WAP) and Standard Messaging System (SMS). Furthermore, we'll cover specific enhancements to the current crop of phones from brands such as Nokia, Siemens, Motorola, Ericsson, and NTT DoCoMo, allowing you to take games to a new level no matter what your target platform happens to be.

For example, some carriers provide location-based information. This is an extremely exciting and relevant tie-in to gaming. This will allow people to literally use their mobile phones to hunt down or otherwise play with each other through the physical, bricks-and-mortar world.

Part III: The Java 2 Micro Edition

This section dissects the J2ME in all its gory detail. You'll learn how to build J2ME applications, which tools to use, and key programming techniques.Programming for handheld devices is often much different than coding for a full-blown desktop computer. However, it doesn't have to be more difficult.

Part IV: Let the Games Begin!

This is where things start getting deep. We'll thoroughly cover the nooks and crannies of J2ME, along with in-depth discussions on graphics, sounds, animation, multiplayer networking, and other game-related topics.

Additionally, one of the most important things this book will show you are the limitations of Micro Java and, in certain cases, how to get around them.Each section will include lots of source code, so that you can immediately begin compiling, tweaking, and testing things out.

Part V: J2ME Extensions

J2ME is a cross-platform standard. Any program you write in J2ME should work, more or less, on any other mobile phone or handheld device. However, every device has its own specialties and intricacies.

This section will cover other forms, profiles, and configurations of J2ME. For example, you'll learn a little bit about coding for a set-top television box. In addition, we'll focus on two popular Application Programming Interfaces (APIs) from the world's largest handheld hardware platforms.

Finally, this section will show you the best ways to take game elements from one platform and port them to others.

Part VI: Micro Racer

Every good thing must reach its end. But rather than just stuff you full of knowledge and then leave you alone in the vast, dry desert to figure everything out, this book includes the full code to a superior Micro Java game that we call Micro Racer.

Micro Racer is a fast moving, multiplayer experience. The game pushes the enveloper on Micro Java's graphical, sound, and networking abilities.You begin the game with a simple racecar. You can race around all you want, picking up bonus points, avoiding crashes, and exploring new tracks.Over time, however, your car will experience wear and tear and might even break down. You will need to log into The Garage to fix up your car.

At The Garage, you'll be able to buy new parts, trade away old parts, and compare your score and standing. As you gain more and more money, you'll be able to soup up your car with turbo boosters, nitro packs, monster tires, spiked wheels, oil slicks, smoke screens, and other extras.

The people you trade with at The Garage are not artificial intelligences; rather, they are other actual players.

Although Micro Racer is an advanced game, we believe you'll be able to do even better. It is our hope that you will take this game, and the knowledge learned throughout this book, and go on to create bigger and better things.

Summary

It is our hope that readers of this book will go on to do more than create an excellent crop of new games. We believe that given the paradigm shifts of always-on networking and in-pocket interactivity, the J2ME games of tomorrow have the potential to redefine the whole medium. In fact, given the pervasiveness of handheld devices and the potential for reaching a wider audience than ever before, a truly original game concept can revolutionize the world.

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Edition details

• Publisher: Addison-Wesley Professional
• Publication date: 2002
• ISBN 10: 0672323427
• ISBN 13: 9780672323423
• Binding: Paperback
• Language: English
• Edition number: 1
• Number of pages: 576