title: JSOUP Find the ID of a DIV with specific class name
body: <p>How do extract the ID out of a div with a specific class name? </p>
  
  <p>EX:</p>
  
  <pre><code>&lt;div id="37849374" class="thread"&gt;
      Foo foo foo foo
  &lt;/div&gt;
  &lt;div id="28393842" class="thread"&gt;
      Doo doo doo doo
  &lt;/div&gt;
  </code></pre>
  
  <p>I'm thinking about falling back to regex and just proceeding that way.</p>