The content of this book is meant to be read from start to finish. It begins with the basics and every subsequent chapter introduces increasingly advanced features and concepts. Sections of the book are intended to be self-containing and to-the-point, so that the book can be referred back to by non-beginners.

* Examples that print to standard output (recommended for first-time readers)

* Silent, self-checking examples in the form of [JUnit](http://junit.org/) tests.

The readers are invited to study whichever style suits them best.