public static long nanosFromDate(long ms){
  Calendar cal=getCalendar();
  cal.setTimeInMillis(ms);
  return nanosFromCalendar(cal);
}

public static long nanosFromDate ( long ms ) { Calendar cal = getCalendar ( ) ; cal . setTimeInMillis ( ms ) ; return nanosFromCalendar ( cal ) ; }
convert a time in milliseconds in utc to the nanoseconds since midnight ( in the default timezone ) .
