Java turns the long integer time into a string date

The database is stored in the timestamp format, which is followed by the front end:
1436255550710 Long integer Time-cut
Convert to "2015-07-07" this format?

Import Java.io.ioexception;import Java.text.simpledateformat;import Java.util.date;public class Test {/*** Java turns the long integer time into a string date * @param args* @throws ioexception*/public    static void Main (string[] args) {    date date=new date (1436255550710l);    SimpleDateFormat format = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");    String str = format.format (date);    System.out.println (str);    }    }

　　

Java turns the long integer time into a string date