title: Hashtable raw type
body: <p>I'm getting this warning
  here is code: </p>
  
  <pre><code>Hashtable nu=new Hashtable();
  Hashtable ns=new Hashtable();
  nu.put(new String("postmaster"),new String("admin"));
  ns.put(new String("SMTP"),new String(""));
  ns.put(new String("POP3"),new String(""));
  ns.put(new String("EMAIL"),new String(""));
  ns.put(new String("USER"),new String(""));
  ns.put(new String("PASS"),new String(""));
  </code></pre>
  
  <blockquote>
    <p>warning: [unchecked] unchecked call to put(K,V) as a me
    mber of the raw type Hashtable</p>
  </blockquote>