jregex documentation

Pattern matching

Pattern searching

Replacing Updated!

Tokenizing Updated!

Filesystem utilities New!

Appendix D: Backslash issues

basic operations

characters ( "a" , "A" , ... )

character classes ( "[a-z0-9]" , "[^a-z0-9]" , "\d" , "\D" , ... )

named clases ( "\p{name}" , "\P{name}" )

combined classes ( "(?C₁+C₂-C₃&C₄)" )

anchors ( "^" , "$" , "\b" , "\B" , "\A" , "\Z" , ... )

groups ( "(REGEX)" , "(?:REGEX)" )

named groups ( "({Name}REGEX)")

backreferences ( "\1" , "\2" , ... )

named backreferences ( "{\NAME}")

quantifiers ( "ELEMENT?" , "ELEMENT*" , "ELEMENT+" , "ELEMENT{n}" , "ELEMENT{m,n}" , ... )

assertions ( "(?=REGEX)" , "(?!REGEX)" , "(?<=REGEX)" , "(?<!REGEX)" )

comments ( "(?# it's a comment )" )

special expressions ( "(?(condition)yes-pattern|no-pattern)" , "(?>REGEX)" , "(?@C₁C₂)" , ... )

Named groups

Non-breaking search

PerRE manpage - an original source for perl5.6 regex syntax.

Regular expression HOWTO - Python-oriented; from the very beginning to advanced concepts. Easy to read.

Regex syntax in java.util.regex - since JDK 1.4