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The Best of the JVM:

High performance
Real threading
Vast array of libraries

It's Just Ruby:

Ruby 1.8.7 compatible now
Ruby 1.9 compatible soon

Platform Independent:

Easy to install
Easy migration
No hassles

Download JRuby

Extract JRuby into a directory.
Add that directory's bin subdirectory to the end of your path.
Test it: jruby -v

detailed instructions

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RECENT NEWS

JRuby 1.5.1 Released

The JRuby community is pleased to announce the release of JRuby 1.5.1.

Homepage: http://www.jruby.org/
Download: http://www.jruby.org/download

JRuby 1.5.0 was a long overdue and huge release. JRuby 1.5.1 is a minor follow-up release to address some of the more visible issues discovered after the release of 1.5.0. Everyone is encouraged to move to 1.5.1. Users of JRuby̵...

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JRuby: 100% Pure-Java Implementation of the Ruby Programming Language.

The Best of the JVM:

It's Just Ruby:

Platform Independent:

RECENT NEWS

JRuby 1.5.1 Released

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