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Java 9 Regular Expressions

You're reading from   Java 9 Regular Expressions A hands-on guide to implement zero-length assertions, back-references, quantifiers, and many more

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781787288706
Length 158 pages
Edition 1st Edition
Languages
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Author (1):
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Anubhava Srivastava Anubhava Srivastava
Author Profile Icon Anubhava Srivastava
Anubhava Srivastava
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Toc

Table of Contents (9) Chapters Close

Preface 1. Getting Started with Regular Expressions 2. Understanding the Core Constructs of Java Regular Expressions FREE CHAPTER 3. Working with Groups, Capturing, and References 4. Regular Expression Programming Using Java String and Scanner APIs 5. Introduction to Java Regular Expression APIs - Pattern and Matcher Classes 6. Exploring Zero-Width Assertions, Lookarounds, and Atomic Groups 7. Understanding the Union, Intersection, and Subtraction of Character Classes 8. Regular Expression Pitfalls, Optimization, and Performance Improvements

Summary

In this chapter, you were introduced to regular expressions with a bit of history and their flavors. You learnt some use cases where regex are needed. Finally, we covered the basic rules and building blocks of writing regex, with a few examples. You also learnt the eager-matching behavior of the regex engine and how it may impact matching in alternations.

In the next chapter, we will go a level deeper and cover the core concepts of regex in detail, such as quantifiers, lazy vs greedy matching, anchors, negated character classes, Unicode and predefined character classes, special escape sequences, and the rules of escaping inside a character class.

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