This provides a solid introduction to the basics of operating system (OS) internals. After an introductory section, this covers the major subsystems in an orderly progression: processes, memory, storage, protection, distributed systems, and special purpose systems. Although I might quibble with some of the ordering, (e.g., virtual memory vis a vis process management), this gives a firm foundation for anyone teaching introductory OS internals. As an aside, instructors should also be aware of the additional support they'll find at the book's web site.
I have no real objections to this book, but find that some of its emphasis won't suit all readers. For example, 99% of all processors don't run Windows or Linux. Instead, they run your DVD player, car air bags, microwave, digital watch, and just about everything else with a power cord or battery. Engineering students headed for embedded system development will need supplementary material. Also, like every other undergrad text I know, this underplays the critical importance of standards in everything from APIs and file system structures to network protocols and safe coding guideline.
The Java emphasis definitely adds to this book's breadth. For years now, OS examples have featured the Unix API or, perhaps grudgingly, examples from Windows. They're not the only games in town, though. Java's API differs in many ways from the Winux (Lindows?) models, especially in areas having to do with threading and safe execution. When you add in Java's wide popularity and its role as conceptual predecessor to .NET and C#, that makes it a logical candidate for study. Compared to the non-Java version of this title, the additions are minor but well-chosen.
I've taught from the non-Java version of this book and from Tanenbaum and, to tell the truth, have no strong preference between the two. They present comparable material at roughly the same level, both offer good case studies, and both offer on-line support to students and instructors. Each outweighs the other on specific topics but, on the whole, that seems to balance out.