Answer: Very Easy!

Get the Code

svn co http://svn.codehaus.org/jruby/trunk/jruby
cd jruby
ant

Run Your Built JRuby

export PATH=$PATH:$PWD/bin
jruby my_script.rb

Install Gems

gem install somegem

OR

jruby -S gem install somegem

Run the Benchmarks

jruby -J-server -O test/bench/bench_method_dispatch.rb

(-J-server uses the "server" JVM and -O disables ObjectSpace)


Build and Test Your Changes

ant clean test

Look For Bugs To Fix or Report Your Own

JRuby JIRA (bug tracker)


Join the Mailing Lists

JRuby Mailing Lists


Join Us on IRC

Channel #jruby on FreeNode IRC


We're waiting to hear from you!