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You'll find that the second edition carries over many strong points from the original, including a quick-start introduction to Java for C or C++ programmers and the handy quick-reference format. It also details the many new features of Java 1.1, including extensions to the object model and the new release of the Abstract Windowing Toolkit (AWT), Inner Classes, Java Beans, and Java ARchive (JAR) files. The book does not attempt to cover "enterprise" application programming interfaces (API), such as Java's new commerce-related security features, Java Database Connectivity (JDBC) and Remote Method Invocation (RMI). The author plans to document these features in a separate volume.
The second half of Java in a Nutshell, 2nd Edition, is a quick reference to all the packages that comprise the Java API. In the course of over 300 pages, the author introduces each package with a summary and a graphical hierarchy diagram. He then documents each package's component classes and interfaces in detail. For cases where you know the name of a class, but not its package, an index of classes, methods, and fields provide a useful cross-reference to the packages that contain them. This edition removes some of the example code of the previous edition, but provides many samples that cover new language features.
It is also true that this book is a reference and should not be the only resource for someone trying to learn Java, but I disagree with the opinion of another reviewer that this book is useless for beginners. On the contrary, I think it is perfect for beginners, but only as a complement to a good course or beginner's guide.
Once you learn to use this book, you'll wonder how you ever got along without it.
As a programmer who needs classes and methods at my fingertips, I don't want to be forever logged into the Sun site to get hold of code. For me using VJava, DB2, Lotus Notes etc, to keep Netscape open permanently slows me down. I want to see code in concise paper form for perusing and for adding post-it notes to useful pages.
This book is a good physical size, about the size of a good novel, and thus is refreshingly concise. You genuinely can put it on your desk without it becoming a 'conversation piece'. It doesn't come with code cheats. For that I use and recommend 'The Complete Reference' which is the size of a squashed brick.
Four stars because IMHO, this reference could do without a 'What is Java' introduction (even though it's a small part of the book) - it's better done in any textbook.
It rapidly speeds through the essentials of the language, providing simple examples to demonstrate concepts. The remainder of the book provides a reference to the core Java classes.
I was initially sceptical of the number of pages dedicated to reprinting what was already available online. However, this section has proven invaluable as I have found it significantly faster and easier to use than the online equivalents. Once the appropriate class has been found the online documentation can be used to find any further details required.
The book is not overburdened with large examples or long winded explanations. This means finding things quickly, and also makes it easy to carry around (you never know when you might need it :-)
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