code: public static Date addMilliseconds(final Date date, final int addMilliseconds)
  	{
  		final Calendar dateOnCalendar = Calendar.getInstance();
  		dateOnCalendar.setTime(date);
  		dateOnCalendar.add(Calendar.MILLISECOND, addMilliseconds);
  		return dateOnCalendar.getTime();
  	}
docs: Adds milliseconds to the given Date object and returns it. Note: you can add negative values
  too for get date in past.
  
  @param date
  The Date object to add the milliseconds.
  @param addMilliseconds
  The milliseconds to add.
  @return The resulted Date object.