Preface JavaBeans is one of the most important
Developing Java Beans information at hand to begin creating components. So if you’re ready to get right into the techniques and concepts used by the JavaBeans architecture, and if you want to understand the underpinnings of the technology that makes it work, this book is for you. Intended Audience This book is for everyone who wants to know how to build reusable components using the JavaBeans architecture and Java class libraries. It is designed to be used by programmers, students, and professionals that are already familiar with Java, so it doesn’t concentrate on any of the basic concepts or syntax of the language. However, if you are experienced with other object-oriented languages such as C++ or Smalltalk, you should be able to follow along. If you aren’t familiar with Java, you may want to keep a book on the Java language close by, like the Java Language Reference (O’Reilly). In any case, the material should prove useful to both novice and experienced programmers. One chapter discusses the interaction between JavaBeans and ActiveX components, and has some examples using Visual Basic. I assume that readers interested in this topic are already familiar with VB and the ActiveX component architecture, and don’t attempt to explain them. Many good books on Visual Basic are available if you need an introduction. A Moment in Time The JavaBeans architecture continues to evolve. This book describes the technology in its first release, coinciding with version 1.1 of the Java Development Kit. The concepts and techniques that I cover will continue to be relevant in future Java releases, and new things will no doubt be added along the way. With the rapid rate of change that Java is currently undergoing, the best that any book can do is capture a moment in time. How the Book Is Organized The chapters in this book are organized so that each one builds upon the information presented in previous chapters, so it’s best if you read the chapters in order. Chapter 1 This chapter provides a general description of the component model, followed by an overview of the JavaBeans architecture. Chapter 2 This chapter describes the event model introduced in Java 1.1. It covers event listener interfaces, event objects, and event sources, and covers the semantics of event delivery. Topics also include design patterns, event listener registration, and multicast and unicast events. Chapter 3 This chapter describes how to use event adapters to simplify an event listener, and how to adapt an object to an event listener interface. Topics include demultiplexing, using low-level reflection to create generic adapters, event filtering, and event queuing. Chapter 4 page 3
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