A free and open source Java powered Ruby toolkit that will enable developers to implement and embed portions of code from Java to Ruby and vice-versa
JRuby is a 100% Java implementation of the Ruby programming language. It is Ruby for the JVM. JRuby is an alternate implementation of the Ruby programming language. It is also an embedded language for the Java Virtual machine (JVM).

Also, JRuby provides a complete set of core "builtin" classes and syntax for the Ruby language, as well as most of the Ruby Standard Libraries.

The standard libraries are mostly Ruby's own complement of .rb files, but a few of them that depend on C language-based extensions have been reimplemented. Some are still missing, but we hope to implement as many as is feasible.|

Main features:

  • The Best of the JVM:
  • High performance
  • Real threading
  • Vast array of libraries
  • It's Just Ruby:
  • Ruby 1.8.7 & 1.9.2 compatible
  • Both versions in single install
  • Platform Independent:
  • Easy to install
  • Easy migration
  • No hassles

last updated on:
October 30th, 2014, 12:55 GMT
file size:
36.6 MB
developed by:
The JRuby Team
license type:
operating system(s):
Mac OS X
binary format:
Universal Binary
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What's New in This Release:
  • Changes:
  • This is our seventeenth update release since JRuby 1.7.0. The primary goal of 1.7 point releases is to fill out any missing compatibility issues with Ruby 1.9.3.
  • This is a security fix release for CVE-2014-8080. All users are strongly recommended to upgrade. For more information, check out the excellent write up on www.ruby-lang.org.
  • There is one other small change in this release to strip out extra unused files from jruby-complete.jar. jruby-complete.jar is back down to a normal size again.
read full changelog

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