JDBC and Java 2
nd
edition
age 2
Database Programming with JDBC and Java, Second Edition
Copyright © 2000 O'Reilly & Associates, Inc. All rights reserved.
Printed in the United States of America.
Published by O'Reilly & Associates, Inc., 101 Morris Street, Sebastopol, CA 95472.
Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered trademarks,
and The Java™ Series is a trademark of O'Reilly & Associates, Inc. Java and all Java-based
trademarks and logos are trademarks or registered trademarks of Sun Microsystems, Inc., in the
United States and other countries. O'Reilly & Associates, Inc. is independent of Sun Microsystems.
Many of the designations used by manufacturers and sellers to distinguish their products are
claimed as trademarks. Where those designations appear in this book, and O'Reilly & Associates,
Inc. was aware of a trademark claim, the designations have been printed in caps or initial caps.
The O'Reilly logo is a registered trademark of O'Reilly & Associates, Inc. Many of the designations
used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where
those designations appear in this book, and O'Reilly & Associates, Inc. was aware of a trademark
claim, the designations have been printed in caps or initial caps. The use of the image of jacks in
association with the topic of Java and JDBC is a trademark of O'Reilly & Associates, Inc.
While every precaution has been taken in the preparation of this book, the publisher assumes no
responsibility for errors or omissions, or for damages resulting from the use of the information
contained herein.
Preface
It is never too late to become reasonable and wise; but if the insight comes late, there is always
more difficulty in starting the change.
— Immanuel Kant, Prolegomena to Any Future Metaphysics
I began writing the first edition of this book in May 1996 as Java™ celebrated one of its first major
rites of passage, the inaugural JavaOne conference. The conference's underlying theme was Java's
transition from an applet language to a hard-core computing environment. In the time since that
conference, that promise has become a reality. This book captures a small piece of that reality: Java
as a language for enterprise computing.
Enterprise computing, a vague term used mostly to sell business systems development products,
traditionally refers to the mission-critical systems on which a business depends. It almost always
includes a database. At the heart of Java's enterprise computing philosophy is the Java 2 Enterprise
Edition (J2EE) platform and its two platforms by APIs: Enterprise JavaBeans (EJB) and Java
Database Connectivity (JDBC). Older languages require third-party APIs to provide this kind of
support. Java, on the other hand, includes these features in the central Java enterprise distribution
that you will find on every Java platform. As a developer, you can write distributed applications that
run against relational databases and know that those applications will run on any system on which
you deploy them.
What exactly are these APIs? JDBC—the basic component of this book—enables you to write
applications that access relational databases without any thought as to which particular database you
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