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            Regular expressions are widely used to match strings of text. For example, the POSIX {{grep}} utility supports regular expressions for finding patterns in the specified text. For introductory information on regular expressions, see the Java Tutorials \[[Tutorials 08|AA. Bibliography#Tutorials 08]\]. The {{java.util.regex}} package provides the {{Pattern}} class that encapsulates a compiled representation of a regular expression and the {{Matcher}} class that is an engine which interprets and uses a {{Pattern}} to perform matching operations on a {{CharacterSequence}}.

\[[Tutorials 08|AA. Bibliography#Tutorials 08]\] [Regular Expressions|http://java.sun.com/docs/books/tutorial/essential/regex/index.html]
\[[MITRE 09|AA. Bibliography#MITRE 09]\] [CWE ID 625|http://cwe.mitre.org/data/definitions/625.html] "Permissive Regular Expressions"
\[[CVE 05|AA. Bibliography#CVE]\] [CVE-2005-1949|http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1949]