Head First Java [ペーパーバック]

I really wanted to like this book. I bought the Head First book on design patterns and love it. It was the right mix of irreverance and information. So, I bought this book even though I have been a Java developer for over 5 years. I was excited to see how the Head First authors handled a beginners book for Java.

Not too well, in my opinion. Chapter Three, in particular, was a mess. This chapter introduces the notion of variables yet never explains what an integer variable is. No explanation is given of the float type. We are told that a byte holds 8 bits...but not told what a bit is. We are not told how to assign a hexadecimal value to an int. We are not told that if we assign a numeric value with a leading zero...the compiler will assume that you meant to use octal values. The reader is not told that Strings are immutable. These are all things that will trip up a beginner (the target market for this book). The author of this chapter doesn't even bother to mention that a Java array uses a zero-based index.

Both primitives and the notion of classes are introduced in Chapter Three. Yet, the author doesn't mention that all primitives (except boolean) have wrapper classes. Strings are introduced...but, no mention is made of the StringBuffer or StringBuilder (very useful and often used classes). These items are included in the back of the book in Appendix B.

There are so many things left out that I wonder if the publisher actually had any beginners read this book. Readers of this book will finish this book still ignorant of many Java essentials.

Here is one of their dumbed-down explanations for an object reference:

"Think of a Dog reference variable as a Dog remote control. You use it to get the object to do something (invoke methods). An object reference is just another variable value. Something that goes in a cup. Only, this time, the value is a remote control."

Huh? Granted, they had been using the "cup" metaphor before...but, still I found this book confusing, superficial, and somewhat insulting. It felt like reading a children's Weekly Reader book. (It even has crossword puzzles)

I like the idea of making learning fun. However, in their attempt to make it fun they left out so much info which is pertinent to the beginning Java programmer. Apparently, another rule of the Head First series is that there MUST be a cute picture on every page. Many times, the logical flow of text is hindered because they had to fit a non-illuminating, unnecessary graphic on the page. Many of the pictures are unnecessary and do not help to explain the content at all. Many paragraphs are confusing, unclear, or simply badly structured. The editors were asleep on this one.

Many newbies are giving this book high marks. Unfortunately, they are woefully ignorant of the fact that this book left out a ton of info that is pertinent to actually coding Java well. One poster here raves that he was able to cover 60 pages in one day. In my opinion...ease of reading is not the only criteria for a good programming book.

My recommendations for Java beginners: Beginning Java by Ivor Horton or Core Java by Cay Horstmann.

I like writing reviews on technical books because I think they are of enormous value to those considering buying the book. I buy a lot of books online and the reviews that I read are by far the most important thing that influences my decision to buy. Or not.

I also like to read what others before me have written. In this case - and for all of the "Head First" books I have read - I heartily agree with what virtually all others have written: these books are a great way to learn complicated, and oftentimes boring, subject material.

So I won't rehash what others have already written, except to say that if what you read was good - believe it.

I think the most important thing I can say about this book is that I agree with what Hye Nyoun Eum Kim wrote: NOT for beginners. I remember thinking to myself throughout the book that a fair, or at least some, amount of Java knowledge would be necessary in order to understand what the authors were covering.

If you already know Java and want to know it better, buy this book. If you are new to Java, and especially if you are new to programming, I still recommend buying this book. But do yourself a favor - check out other introductory Java books and buy one of those as well. A good starting point? I have bought the "Just Java" (by Peter van der Linden) books ever since Java 1.0 came out.

That's my opinion in a nutshell about the Head First Series of computer books. I like this book, and the other 3 that I own, a lot. I didn't give it 5 stars because this review is for you. People learn differently and have expectations to meet their needs. This book is informative, interactive and upbeat. It provokes thought and problem-solving by continously prompting your brain to give input. When you're done - you know Java and a lot of subtle nuances.

I realize this is a "soft" review. There are some hardcore people who want to know "will it talk about this or that?" The simple answer is "yes." It begins by assuming you've done some programming, not just HTML. It's jammed tight with important information. So if you use a highlighter, put it down and get a paint brush. This is not a "linear" book written for the person who wants to read and memorize references. Java is a language and its taught by engaging the reader into a mental dialogue. It's fun. You won't fall asleep. You'll learn a lot. But more importantly, you'll remember even more.

How can you go wrong with a tech book that has code, ducks and Java crossword puzzles? Better know your stuff baby or read the book because it comes with a mantra, "Release Your Code." How did it work for me? Shh...5 stars!