public static long elapsedMSec(long startMsecTime){
  return (System.currentTimeMillis() - startMsecTime);
}

public static long elapsedMSec ( long startMsecTime ) { return ( System . currentTimeMillis ( ) - startMsecTime ) ; }
milliseconds elapsed since the time specified , the input is nanotime the only conversion happens when computing the elapsed time
