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JRuby, an implementation of Ruby on the JVM
branch: master
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antlib Merge branch 'jruby-1_7'
bench [Truffle] Remove old benchmarks - see bench9000 instead.
bin Partially fix ast command
core JavaSupport can't change to interface and be bytecode-compatible.
install Yow old shipped JREs
ivy Bump for next dev version
lib psych as default gem
maven psych as default gem
rakelib Use 2.x and 3.x happy rspec syntax
samples Revert "Remove FFI"
spec [Truffle] Added EncodingError.
test [Truffle] Plural is better.
tool [Truffle] FindBugs: Fix exit status and give it a bigger heap.
truffle [Truffle] Use more Java-like method names.
.gitattributes *.bash files are text files
.gitignore [Truffle] 'jt bench' commands.
.travis.yml let travis be green - maybe a regression due to the new psych default… Changing to header level 4
COPYING [Truffle] Move Rubinius core files out of kernel since everything is …
LEGAL Adding back LEGAL (for Ola)
LICENSE.RUBY Add license text for ruby licensed modules jruby.authors += self
Rakefile Better pattern to filter out org.jruby sources from Rake output.
VERSION switch back to Set MRI stdlib revision to match MRI 2.2.0p0.
findbugs.xml Ignore intentional String equality checking in RubyModule in FindBugs.
jruby.bnd.template JRUBY-2741: OSGify jruby.jar in the release jruby distribution (patch…
lifecycle-mapping-metadata.xml * Updated config for Eclipse IDE
pom.rb [Truffle] Added new profiles for generating spec reports.
pom.xml [Truffle] Added new profiles for generating spec reports.

JRuby - A Java implementation of the Ruby language

Master: Build Status 1.7 branch: Build Status

Authors: Stefan Matthias Aust, Anders Bengtsson, Geert Bevin, Ola Bini, Piergiuliano Bossi, Johannes Brodwall, Rocky Burt, Paul Butcher, Benoit Cerrina, Wyss Clemens, David Corbin, Benoit Daloze, Thomas E Enebo, Robert Feldt, Chad Fowler, Russ Freeman, Joey Gibson, Kiel Hodges, Xandy Johnson, Kelvin Liu, Kevin Menard, Alan Moore, Akinori Musha, Charles Nutter, Takashi Okamoto, Jan Arne Petersen, Tobias Reif, David Saff, Subramanya Sastry, Chris Seaton, Nick Sieger, Ed Sinjiashvili, Vladimir Sizikov, Daiki Ueno, Matthias Veit, Jason Voegele, Sergey Yevtushenko, Robert Yokota, and many gracious contributors from the community.

Project Contact: Thomas E Enebo

JRuby also uses code generously shared by the creator of the Ruby language, Yukihiro Matsumoto


JRuby is the effort to recreate the Ruby ( interpreter in Java.

The Java version is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application. See the docs directory for more information.



bin/jruby rubyfile.rb

interprets the file rubyfile.rb.

If you checked out from the repository or downloaded the source distribution, see the next section to build JRuby first.

Compiling from source

See BUILDING for more information.


See BUILDING: Developing and Testing for more information.

More Information

Visit for more information.

Visit for the Maven Site documentation.


Read the COPYING file.

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