title: Why use StringBuilder explicitly if the compiler converts string concatenation to a StringBuilder automatically?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java">StringBuilder vs String concatenation in toString() in Java</a>  </p>
  </blockquote>
  
  
  
  <p>I am wondering, since the compiler internally uses a StringBuilder to append Strings when performing String concatenation, then what's the point and why should I bother using StringBuilder if String concatenation already did the job for you? Are there any other specific reasons?</p>