The first part of this book explores the inner workings of Java mechanisms, including the representation of data types in memory, passing arguments, and the implementation of strings and arrays. The author also examines stale threading model and garbage collection as implemented on different Java platforms. A large group of undocumented class (sun .* packages) is what amounted to an application programming interface is Java not recorded (API). Although these classes as if there is to support the Java environment, you will learn how to use many of their interfaces to a variety of tasks including layout management, FTP, HTTP, email, news and communications, data encoding, and character conversion. This is a controversial subject for the system is said to platform-independent programming, but the author gives a balanced assessment of the benefits and drawbacks. All in all, this is one of the book's most interesting, unusual, and engagingly written in the Java programming we've seen.