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Regular Expression Libraries
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1.RE2/J541 usages

com.google.re2j » re2j

Linear time regular expressions for Java
Last Release on Jan 9, 2025

2.Joni85 usages

org.jruby.joni » joni MIT

Java port of Oniguruma: http://www.geocities.jp/kosako3/oniguruma that uses byte arrays directly instead of java Strings and chars
Last Release on Feb 25, 2026

3.Apache Ant + Apache Regexp45 usages

org.apache.ant » ant-apache-regexp Apache

Apache Ant + Apache Regexp
Last Release on Apr 6, 2026

4.Tregex40 usages

org.graalvm.regex » regex UPL

Truffle regular expressions language.
Last Release on Apr 21, 2026

5.RegExp24 usages

com.jetbrains.intellij.regexp » regexp

RegExp
Last Release on Apr 28, 2026

6.Named RegExp94 usages

com.github.tony19 » named-regexp Apache

Named capturing groups for Java 5/6
Last Release on Jan 21, 2024

7.Kaleidoscope Core5 usages

dev.soundness » kaleidoscope-core Apache

Statically-checked inline matching on regular expressions in Scala
Last Release on Feb 12, 2026

8.Okapi Filter For Regex8 usages

net.sf.okapi.filters » okapi-filter-regex Apache

Okapi Filter For Regex
Last Release on Jan 23, 2026

9.Oro878 usages

oro » oro Apache

Library from Apache Jakarta for regular expressions, text processing, and pattern matching in Java.
Last Release on Nov 8, 2005

10.RegExpGen4 usages

org.cornutum.regexp » regexp-gen MIT

Generates strings that match a regular expression
Last Release on Dec 16, 2025