title: HttpServletRequest getParameter of Radio Buttons
body: <p>I want to have the parameter value of radio button. </p>
  
  <pre><code>&lt;input type="radio" name="lang" value="Official"/&gt;Official Only
  &lt;br/&gt;
  &lt;input type="radio" name="lang" value="all"/&gt;All
  </code></pre>
  
  <p>How do I check in java to see which one is selected?</p>