
Java 9 Regular Expressions
Description
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Key Features
[*]Discover regular expressions and how they work
[*]Implement regular expressions with Java to your code base
[*]Learn to use regular expressions in emails, URLs, paths, and IP addresses
Book DescriptionRegular expressions are a powerful tool in the programmer's toolbox and allow pattern matching. They are also used for manipulating text and data. This book will provide you with the know-how (and practical examples) to solve real-world problems using regex in Java. You will begin by discovering what regular expressions are and how they work with Java. This easy-to-follow guide is a great place from which to familiarize yourself with the core concepts of regular expressions and to master its implementation with the features of Java 9. You will learn how to match, extract, and transform text by matching specific words, characters, and patterns. You will learn when and where to apply the methods for finding patterns in digits, letters, Unicode characters, and string literals. Going forward, you will learn to use zero-length assertions and lookarounds, parsing the source code, and processing the log files. Finally, you will master tips, tricks, and best practices in regex with Java.What you will learn
[*]Understand the semantics, rules, and core concepts of writing Java code involving regular expressions
[*]Learn about the java.util.Regex package using the Pattern class, Matcher class, code snippets, and more
[*]Match and capture text in regex and use back-references to the captured groups
[*]Explore Regex using Java String methods and regex capabilities in the Java Scanner API
[*]Use zero-width assertions and lookarounds in regex
[*]Test and optimize a poorly performing regex and various other performance tips
Who this book is forThis book is for Java developers who would like to understand and use regular expressions. A basic knowledge of Java is assumed.
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Person
Anubhava Srivastava has more than 22 years of professional experience in architecture, design, and software development. He specializes mainly in the J2EE technology stack, web technologies, CICD, test-driven development, and AWS cloud-based development. He is an active contributor to the Stack Overflow community. He currently stands in the top 35 users in terms of reputations out of the 7.5 million Stack Overflow users. He is passionate about regular expressions and is always willing to sharpen his regex skills further. He has answered close to 10,000 regex questions on Stack Overflow. He has authored and released a test-driven framework, called GenericFixture, for FitNesse as an open source software. You can follow him on Twitter at @anubhava.
Content
Getting Started with Regular Expressions
Understanding the Core Constructs of Java Regular Expressions
Working with Groups, Capturing, and References
Regular Expression Programming Using Java String and Scanner APIs
Introduction to Java Regular Expression APIs - Pattern and Matcher Classes
Exploring Zero-width Assertions, Lookarounds, and Atomic Groups
Understanding the Union, Intersection, and Subtraction of Character Classes
Regular Expression Pitfalls, Optimization, and Performance Improvements
System requirements
File format: ePUB
Copy protection: Adobe-DRM (Digital Rights Management)
System requirements:
- Computer (Windows; MacOS X; Linux): Install the free reader Adobe Digital Editions prior to download (see eBook Help).
- Tablet/smartphone (Android; iOS): Install the free app Adobe Digital Editions or the app PocketBook before downloading (see eBook Help).
- E-reader: Bookeen, Kobo, Pocketbook, Sony, Tolino and many more (not Kindle).
The file format ePub works well for novels and non-fiction books – i.e., „flowing” text without complex layout. On an e-reader or smartphone, line and page breaks automatically adjust to fit the small displays.
This eBook uses Adobe-DRM, a „hard” copy protection. If the necessary requirements are not met, unfortunately you will not be able to open the eBook. You will therefore need to prepare your reading hardware before downloading.
Please note: We strongly recommend that you authorise using your personal Adobe ID after installation of any reading software.
For more information, see our ebook Help page.
File format: PDF
Copy-Protection: Adobe-DRM (Digital Rights Management)
System requirements:
- Computer (Windows; MacOS X; Linux): Install the free reader Adobe Digital Editions prior to download (see eBook Help).
- Tablet/smartphone (Android; iOS): Install the free app Adobe Digital Editions or the app PocketBook before downloading (see eBook Help).
- E-reader: Bookeen, Kobo, Pocketbook, Sony, Tolino and many more (only limited: Kindle).
The file format PDF always displays a book page identically on any hardware. This makes PDF suitable for complex layouts such as those used in textbooks and reference books (images, tables, columns, footnotes). Unfortunately, on the small screens of e-readers or smartphones, PDFs are rather annoying, requiring too much scrolling.
This eBook uses Adobe-DRM, a „hard” copy protection. If the necessary requirements are not met, unfortunately you will not be able to open the eBook. You will therefore need to prepare your reading hardware before downloading.
Please note: We strongly recommend that you authorise using your personal Adobe ID after installation of any reading software.
For more information, see our eBook Help page.