What is so good about StringBuilders?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java">StringBuilder vs String concatenation in toString() in Java</a>  </p>
</blockquote>



<p>Why are StringBuilders better to use than normal String Concatenation?</p>
