title: Collections.sort by a date property on the objects in a list
body: <p>How do I use Collections.sort to sort list of objects with the following properties?</p>
  
  <p>I'd like to sort the list by date.</p>
  
  <pre><code>public Comment {
      private Timestamp date;
      private String description;
  
  }
  </code></pre>
  
  <p>Of course, there are getters and setters as well.</p>
  
  <p>Thanks!</p>