ReactiveX and RxJava address many problems that programmers face daily, allowing them to express business logic and spend less time engineering code. Have you ever struggled with concurrency, event handling, obsolete data states, and exception recovery? What about making your code more maintainable, reusable, and evolvable so it can keep up with your business? It might be presumptuous to call reactive programming a silver bullet that eliminates these problems, but it certainly is a progressive leap toward addressing them.
There is also a growing user demand to make applications responsive in real time. Reactive programming allows you to quickly analyze and work with live data sources such as Twitter feeds or stock prices. It can also cancel and redirect work, scale with concurrency, and cope with rapidly emitting data. Composing events and data as streams...