RxJava is a Java framework that implements the specifications that are described in Reactive Extensions (ReactiveX http://reactivex.io/) about APIs for asynchronous programming with observable streams. Using RxJava framework, developers can easily create event-based and asynchronous applications through observable sequences.
This framework is built on top of the observer pattern to create sequences of events—it also exposes classes and methods that allow developers to compose these sequences. It also makes it easy to handle features that are hard to implement but absolutely necessary in reactive systems, such as threading, synchronization, thread safety, concurrent data structures, and so on.
In this section, we will use version 2 ...
