regexp

Oro

RegExp

Jakarta RegExp

Generex A Java Library for regex to Strings generation

Java port of Oniguruma: http://www.geocities.jp/kosako3/oniguruma that uses byte arrays directly instead of java Strings and chars

scalacheck-gen-regexp

Named capturing groups for Java 5/6

WebJar for escape-string-regexp

A regular expression library for Java

WebJar for path-to-regexp