Introduction to Programming Using Java, Fifth Edition
"This is "a free, on-line textbook on introductory programming, which uses Java as the language of instruction. This book is directed mainly towards beginning programmers, although it might also be useful for experienced programmers who want to learn something about Java. It is certainly not meant to provide complete coverage of the Java language.
The fifth edition covers Java 5.0 and can also be used with later versions of Java. You will find many Java applets on the web pages that make up this book, and many of those applets require Java 5.0 or higher to function. Earlier editions, which covered earlier versions of Java, are still available; see the preface for links."