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JRuby - A Java implementation of the Ruby language

Master: Build Status 1.7 branch: Build Status

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


JRuby 1.7.x requires Java 6 or greater.


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 README.test for more information.

More Information

Visit for more information.

Visit for the Maven Site documentation.


Read the COPYING file.

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