title: How to convert long-integer time to NSString or NSDate to display time?
body: <p>I got a serial number form Java Date which convert into long-integer such as "1352101337000".
  The problem I met is how to analyze this long-integer number back to NSDate or NSString so that I can clear to know what time the serial number is displaying.</p>
  
  <p>Do anybody have solution for this case?</p>