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Learning Reactive Programming With Java 8

You're reading from   Learning Reactive Programming With Java 8 Learn how to use RxJava and its reactive Observables to build fast, concurrent, and powerful applications through detailed examples

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Product type Paperback
Published in Jun 2015
Publisher Packt
ISBN-13 9781785288722
Length 182 pages
Edition 1st Edition
Languages
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Author (1):
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Nickolay Tzvetinov Nickolay Tzvetinov
Author Profile Icon Nickolay Tzvetinov
Nickolay Tzvetinov
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Table of Contents (10) Chapters Close

Preface 1. An Introduction to Reactive Programming FREE CHAPTER 2. Using the Functional Constructions of Java 8 3. Creating and Connecting Observables, Observers, and Subjects 4. Transforming, Filtering, and Accumulating Your Data 5. Combinators, Conditionals, and Error Handling 6. Using Concurrency and Parallelism with Schedulers 7. Testing Your RxJava Application 8. Resource Management and Extending RxJava Index

Chapter 2. Using the Functional Constructions of Java 8

Functional programming is not a new idea; actually, it's pretty old. For example, Lisp, which is a functional language, is the second oldest of today's commonly-used programming languages.

Functional programs are built using small pieces of reusable pure functions (lambdas). The program logic is composed of small declarative steps and not complex algorithms. That's because functional programs minimize the use of state, which makes imperative programs complex and hard to refactor/support.

With Java 8, the Java world got the lambda expressions and the ability to pass functions to functions. With them, we can code in a more functional style and get rid of a lot of the boilerplate code. The other new thing we got with Java 8 is the streams—something very similar to RxJava's observables but not asynchronous. Combining these streams and the lambdas, we are able to create more functional-like programs.

We...

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