Book Image

Java 9 Concurrency Cookbook, Second Edition - Second Edition

By : Javier Fernández González
Book Image

Java 9 Concurrency Cookbook, Second Edition - Second Edition

By: Javier Fernández González

Overview of this book

Writing concurrent and parallel programming applications is an integral skill for any Java programmer. Java 9 comes with a host of fantastic features, including significant performance improvements and new APIs. This book will take you through all the new APIs, showing you how to build parallel and multi-threaded applications. The book covers all the elements of the Java Concurrency API, with essential recipes that will help you take advantage of the exciting new capabilities. You will learn how to use parallel and reactive streams to process massive data sets. Next, you will move on to create streams and use all their intermediate and terminal operations to process big collections of data in a parallel and functional way. Further, you’ll discover a whole range of recipes for almost everything, such as thread management, synchronization, executors, parallel and reactive streams, and many more. At the end of the book, you will learn how to obtain information about the status of some of the most useful components of the Java Concurrency API and how to test concurrent applications using different tools.
Table of Contents (12 chapters)

Sorting the elements of a stream

Another typical operation you will want to do with a Stream is sorting its elements. For example, you may want to sort the elements of the Stream by name, postal code, or any other numeric value.

With streams, we have other considerations with the so-called encounter order. Some streams may have a defined encounter order (it depends on the source of the Stream). Some operations work with the elements of the stream in its encountered ordered, such as limit(), skip(), and others. This makes that parallel computation for this methods doesn't give us good performance. In these cases, you can speed-up the execution of these methods by deleting the ordering constraint.

In this recipe, you will learn how to sort the elements of Stream and how to delete the ordering constraint in situations where we don't need the encounter order of Stream.

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