title: how many classes per package? methods per class? lines per method?
body: <p>I have to give a general note to some huge Java project for which I have but little visibility and I was wondering if there were any guidelines for determining:</p>
  
  <ul>
  <li>what number of classes per package can be considered right, to low, or to high (this project has 3.89 classes per package, which seems a bit too small for me), </li>
  <li>number of methods per class? (this project has 6.54 methods per class...</li>
  <li>number of lines per method? (this project has about 7 lines per method (seems pretty good to me, maybe a bit low))</li>
  </ul>
  
  <p>I should note that this question is only dealing with volumetry. I have a bunch of reports from quality tools (checkstyle, jdepend, cpd, pmd, ncss) that give me more vision about code redundancy, classes usage, bugs, etc.</p>