Book Image

BlackBerry Java Application Development

Book Image

BlackBerry Java Application Development

Overview of this book

BlackBerry Smartphone was once the domain of jet-setting business users with power suits. Now you can hardly go anywhere without seeing someone using a BlackBerry to check their messages or make a call. It's this kind of explosive growth that makes the BlackBerry ecosystem a great place to develop and market applications through the BlackBerry App World store—this book shows you how to do just that! This step-by-step guide gives you a hands-on experience of developing innovative Java applications for your BlackBerry. With the help of this book, you will learn to build your own applications to illustrate the platform, and the various capabilities that developers can use in their programs. It explores the powers of Blackberry and helps you develop professional and impressive Java applications. The book teaches how to write rich, interactive, and smart BlackBerry applications in Java. It expects the readers to know Java but not Java Mobile or the BlackBerry APIs. We will learn to build rich, interactive, and smart Java applications for the BlackBerry. The book will cover UI programming, data storage, programming network, and internet API apps. As we move on, we will learn more about the BlackBerry's device features, such as messaging, GPS, multimedia, contacts and calendar, and so on.This book also helps you build your own applications to illustrate the platform, and the various capabilities that developers can use in their programs.
Table of Contents (18 chapters)
BlackBerry Java Application Development
Credits
About the Author
Acknowledgement
About the Reviewers
Preface

Connector class


Another critical part of the networking toolkit is the Connector class. This class has only a few static members and acts as a factory for all of the Connection types. The networking that we will be doing is of course one of these, but there are, in fact, many kinds of connections that can be made through the Connector class. This class is very flexible because the open method takes only one parameter—a connection string.

It may seem funny but the Connector class doesn't actually initiate a connection. It simply creates an object that represents the connection. The Connection object does the actual work of opening the connection sometime later when it needs to do so. Therefore, the Connector won't fail unless the connection string is invalid in some way.

A connection string is also called a URL but it is more than just an address like you might think of when web browsing. It can also contain all of the instructions and options that the Connection class might need in order...