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Learning Java Functional Programming

You're reading from   Learning Java Functional Programming Create robust and maintainable Java applications using the functional style of programming

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Product type Paperback
Published in Oct 2015
Publisher
ISBN-13 9781783558483
Length 296 pages
Edition 1st Edition
Languages
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Authors (2):
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Richard M Reese Richard M Reese
Author Profile Icon Richard M Reese
Richard M Reese
Richard M. Reese Richard M. Reese
Author Profile Icon Richard M. Reese
Richard M. Reese
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Table of Contents (16) Chapters Close

Learning Java Functional Programming
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with Functional Programming FREE CHAPTER 2. Putting the Function in Functional Programming 3. Function Composition and Fluent Interfaces 4. Streams and the Evaluation of Expressions 5. Recursion Techniques in Java 8 6. Optional and Monads 7. Supporting Design Patterns Using Functional Programming 8. Refactoring, Debugging, and Testing 9. Bringing It All Together Index

Stream and concurrent processing


All stream operations execute either sequentially or in parallel. They execute sequentially by default. To execute concurrently, a parallel stream must be created. The Stream class uses a parallel method, and the Collection interface uses a parallelStream method to create parallel streams.

The typical iterative loop in Java (such as the for or while loops) are serial in nature. That is, they are designed to execute sequentially and are not able to easily incorporate concurrent behavior.

Over the years, Java has introduced a number of improvements in how parallel behavior can be achieved. Each of these improvements has built upon the thread concept and frequently addresses specific concurrent approaches such as thread pools. However, these approaches required the developer to deal with possible data corruption and deadlock situations.

To parallelize a stream on the surface, all you need to do is to use the parallel method instead of the stream method and the...

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