Regular Expressions

This section teaches the regular expression syntax supported by the java.util.regex API and presents several working examples to illustrate how the various objects interact.

1. Introducing Regular Expressions
   

   Introducing regular expressions: what are they and what you can do with them. Includes the code used to test regular expressions, used throughout this section.

2. String Literals
   

   Introduces basic pattern matching, metacharacters, and quoting.

3. Character Classes
   

   Describes simple character classes, negation, ranges, unions, intersections, and subtraction.

4. Predefined Character Classes
   

   Describes the basic predefined character classes for whitespace, word, and digit characters.

5. Quantifiers
   

   Explains greedy, reluctant, and possessive quantifiers for matching a specified expression x number of times.

6. Capturing Groups
   

   Explains how to treat multiple characters as a single unit.

7. Boundaries
   

   Describes line, word, and input boundaries.

8. The Pattern Class
   

   Examines other useful methods of the Pattern class, and explores advanced features such as compiling with flags and using embedded flag expressions.

9. The Matcher Class
   

   Describes the commonly-used methods of the Matcher class.

10. Methods of the PatternSyntaxException Class
    

    Describes how to examine a PatternSyntaxException.

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