what is the difference between StringBuilder and Stringbuffer?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/355089/stringbuilder-and-stringbuffer-in-java">StringBuilder and StringBuffer in Java</a>  </p>
</blockquote>



<p>what is the difference between StringBuilder and Stringbuffer?</p>
