~/projects ➔ gem install java-inline
Successfully installed ZenTest-4.1.4
Successfully installed RubyInline-3.8.3
Successfully installed java-inline-0.0.1-java
3 gems installed
Installing ri documentation for ZenTest-4.1.4...
Installing ri documentation for RubyInline-3.8.3...
Installing ri documentation for java-inline-0.0.1-java...
Installing RDoc documentation for ZenTest-4.1.4...
Installing RDoc documentation for RubyInline-3.8.3...
Installing RDoc documentation for java-inline-0.0.1-java...

~/projects ➔ cat demo.rb
require 'rubygems'
require 'java_inline'

class Woo
  inline :Java do |builder|
    builder.java '
      public static String hello() {
        return "woo";
      }
    '
  end
end

puts Woo.new.hello

~/projects ➔ jruby demo.rb
woo