This guide aims to introduce a beginner reactive programmer to the complete power of the RxJava implementation of reactive programming for the JVM. It is based on the IntroToRx guide for Rx.NET.

No experience with either reactive or functional programming is needed to follow the book. Familiarity with the basics of Java is required.

[Begin learning](/Part 1 - Getting Started/1. Why Rx.md)

The content of this book is meant to be read from start to finish. It is bigger than your average tutorial and smaller than an actual book. 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.

The examples used in the book are also available in compilable java files in two formats:

• Examples that print to standard output (recommended for first-time readers)
• Silent, self-checking examples in the form of JUnit tests. The readers are invited to study whichever style suits them best.