title: Imports in Processing?
body: <p>I have a file system like so:</p>
  
  <pre><code>sketch
  - sketch.pde
  builtins
  - button.pde
  </code></pre>
  
  <p>Where <code>sketch.pde</code> is my main Processing sketch, and <code>button.pde</code> is an external file containing various classes.</p>
  
  <p>How do I access the classes from <code>button.pde</code>? I'm guessing it's through an <code>import</code> but I don't know if it's different in Processing than in Java.</p>
  
  <p>I tried looking for an answer by looking through various open-source Processing projects, but all of the files were in one place, so no imports were required.</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>Apparently basic importing is impossible in Processing.</p>
  
  <p>I have a mini-question then: I have another file system:</p>
  
  <pre><code>sketch
  - sketch.pde
  - builtins
    - button.pde
  </code></pre>
  
  <p>Can I access <code>button.pde</code> now? Or is it still impossible?</p>