title: ordering a hashset example?
body: <p>I need an example on how to use a comparable class on a <code>HashSet</code> to get an ascending order. Let’s say I have a <code>HashSet</code> like this one:</p>
  
  <pre><code>HashSet&lt;String&gt; hs = new HashSet&lt;String&gt;();
  </code></pre>
  
  <p>How can I get <code>hs</code> to be in ascending order?</p>