title: Get a file inside a specific package
body: <p>I've a java package (package A) and I would retrieve a file contained into another package (package B).
  For example, suppose that into package A I have a class named ClassA. The ClassA needs to access an xml file (i.e. a configuration file) contained into package B.</p>
  
  <p>What is the procedure that I can use to access the configuration file from ClassA?</p>
  
  <p>Thank you in advance. FA.</p>