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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

Introduction to the Java String API for regular expressions' evaluation

The Java String API provides some useful methods to evaluate regular expressions against a text represented by the String object. Let's list those methods from the String class:

Method Signature

Purpose

boolean matches(String regex)

Matches the given regular expression against the string that the method is invoked on and returns true/false, indicating whether the match is successful (true) or not (false).

String replaceAll(String regex, String replacement)

Replaces each substring of the subject string that matches the given regular expression with the replacement string and returns the new string with the replaced content.

String replaceFirst(String regex, String replacement)

This method does the same as the previous one with the exception that it replaces only the first substring...

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