code: public static String getTimestamp(final long pMilliseconds) {
  
      java.util.Date     date     = new java.util.Date(pMilliseconds);
      java.util.Calendar calendar = new GregorianCalendar();
  
      calendar.setTime(date);
      return getTimestamp(calendar);
    }
docs: Returns a presentation of the date based on the given milliseconds.
  <p>
  @param pMilliseconds The specified number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT.
  @return a presentation of the calendar time.
  @see <a href="http://java.sun.com/products/jdk/1.3/docs/api/java/util/Calendar.html">{@code java.util.Calendar}</a>