title: Getting all Classes from a Package
body: <p>Lets say I have a java package <code>commands</code> which contains classes that all inherit from <code>ICommand</code> can I get all of those classes somehow? I'm locking for something among the lines of:</p>
  
  <pre><code>Package p = Package.getPackage("commands");
  Class&lt;ICommand&gt;[] c = p.getAllPackagedClasses(); //not real 
  </code></pre>
  
  <p>Is something like that possible?</p>