[jruby-dev] question for code coverage

[tom]

Hi, Sir
  I am a developer from China. Recently I'm working a project using jruby. And 
the requirement of customer contains code coverage. We found there is one tool 
named 'rcov' that is used for ruby coverage. So we want use it. But we install 
it using gem, it failed. But it works fine in a pure ruby environment. The 
jruby we are using is 1.1.6. Would you please give me some advice?
  Thanks
  Best wishes,