title: Netbeans: splitting one project in three (client/server/common)
body: <p>In my self-imposed quest to learn Netbeans, I decided to try out an already existing project of mine. </p>
  
  <p>Using a solution provided <a href="https://stackoverflow.com/questions/4768218/make-netbeansant-generate-multiple-jar-files-for-one-project">here</a>, I tried to make three different projects to host server/client/common portions of my code. I failed at the second one with the message:</p>
  
  <pre><code>"Package Folder Already Used in Project"
  The following folders that you selected are already used in this or another 
  project.  
  </code></pre>
  
  <p>Etc., etc. Bottomline: folder used as source in one project, can't be used as source in another one. </p>
  
  <hr>
  
  <p>The problem is, the application <em>does</em> use single source folder...</p>
  
  <ul>
  <li>src/com/.../client/</li>
  <li>src/com/.../common/</li>
  <li>src/com/.../server/</li>
  </ul>
  
  <p>... and I was planning on adding the same folder to each project, filtering needed classes with Includes/Excludes.</p>
  
  <p>What is the kosher way of achieving what I'm trying to do here? (Barring that, <em>vege</em> way will do, too).</p>