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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

The MatchResult interface


MatchResult is an interface for representing the result of a match operation. This interface is implemented by the Matcher class. This interface contains query methods used to determine the results of a match against a regular expression. The match boundaries, groups, and group boundaries can only be retrieved but not modified through this interface. Here is a list of important methods provided in this interface:

Method Name

Description

int start()

Returns the start index of the match in the input

int start(int group)

Returns the start index of the specified capturing group

int end()

Returns the offset after the last character matched

int end(int group)

Returns the offset after the last character of the subsequence captured by the given group during this match

String group()

Returns the input substring matched by the previous match

String group(int group)

Returns the input subsequence captured by the given group during the previous match operation

int groupCount()

Returns the number...

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