Book Image

Mastering Concurrency Programming with Java 9 - Second Edition

By : Javier Fernández González
Book Image

Mastering Concurrency Programming with Java 9 - Second Edition

By: Javier Fernández González

Overview of this book

Concurrency programming allows several large tasks to be divided into smaller sub-tasks, which are further processed as individual tasks that run in parallel. Java 9 includes a comprehensive API with lots of ready-to-use components for easily implementing powerful concurrency applications, but with high flexibility so you can adapt these components to your needs. The book starts with a full description of the design principles of concurrent applications and explains how to parallelize a sequential algorithm. You will then be introduced to Threads and Runnables, which are an integral part of Java 9's concurrency API. You will see how to use all the components of the Java concurrency API, from the basics to the most advanced techniques, and will implement them in powerful real-world concurrency applications. The book ends with a detailed description of the tools and techniques you can use to test a concurrent Java application, along with a brief insight into other concurrency mechanisms in JVM.
Table of Contents (21 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Chapter 2. Working with Basic Elements - Threads and Runnables

Execution threads are the core of concurrent applications. When you implement a concurrent application, no matter the language, you have to create different execution threads that run in parallel in a non-deterministic order unless you use a synchronization element (such as a semaphore). In Java you can create execution threads in two ways:

  • Extending the Thread class
  • Implementing the Runnable interface

In this chapter, you will learn how to use these elements to implement concurrent applications in Java. We will cover the following topics:

  • Threads in Java: characteristics and states
  • The Thread class and the Runnable interface
  • First example: matrix multiplication
  • Second example: file search