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JavaFAQ Home » Text processing
Regular expressions are the most common programming technique to
search for patterns in strings and extracting substrings. They are an essential
awk, sed, vi, .... Java, as of version 1.4, has extensive support for regular
expressions in two areas.
- Addtional String methods.
- Additional classes,
java.util.Matcher, allow use of precompiled regular expressions as
well as providing many additional functions..
Regular expressions provide more general mechanisms for parsing input strings
Programming language. Regular expressions (often refereed to as
regex) are essentially a programming language of their own.
Regular Expression Tutorial
(http://www.regular-expressions.info/tutorial.html) covers a lot of
introductory regular expression material.
- Mastering Regular Expressions by Jeffrey Friedl is an excellent
book covering regular expressions from introduction to advanced usage.
Covers all major regular expression implementations, not just Java.
Regular Expressions and the Java Programming Language
(http://java.sun.com/developer/technicalArticles/releases/1.4regex) is a Sun
article summarizing Java's regular expressions. This is useful if you are
already familiar with Java and the idea of regular expressions.
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