Regular Expressions

Resources

• Deitel, end of chapter on strings
• Package java.util.regex. Contains:
  • class Pattern: for building regular expression pattern strings. Documentation contains a good listing of Regular Expression constructs
  • class Matcher: methods for interpreting patterns and determining matches
  • interface MatchResult: methods for query results, when matching a regular expression
  • class PatternSyntaxException: thrown when there's a syntax error in a regular expression
• Tutorial on Regular Expressions -- from the Java web site

Validate.java -- A small program to test a regular expression against a string

A few examples from the textbook

• Fig. 30.20 - 30.21 -- illustrates use of regular expressions to validate information in typical address fields (like in a database)
• Fig. 30.23 -- example that illustrates using regular expressions in String class methods used for text replacements
• Fig. 30.24 -- Using class Matcher with regular expression patterns