[Resolvido]Calcular diferença entre duas datas

public class DiffDate
{
	public static void main(String[] args)
	{
		String date1 = "10/07/2010 11:14";
		String date2 = "12/08/2010 09:01";
		
		String mask1 = "dd/MM/yyyy HH:mm";
		String mask2 = "dd/MM/yyyy HH:mm";
		
		DiffDate dif = new DiffDate();
		
		//é necessário que date2 > date1
		System.out.println(dif.calculateDiffDate(date1, mask1, date2, mask2));
		
	}
	
	private String calculateDiffDate(String dataString1, String formatDataString1, String dataString2,
			String formatDataString2)
	{
		Date date1 = formatDate(dataString1, formatDataString1);
		Date date2 = formatDate(dataString2, formatDataString2);

		if (date2.compareTo(date1) > 0)
		{
			//invert a ordem do parametros e insere negativo (-) na frente
			return "(-)" + millisecondsToDateString(date2, date1);
		}
		
		return dateToString(date1, date2);
	}
	
	/**
	 * @param date
	 * @param DATE_FORMAT: dd/MM/yyyy
	 *            dd/MM/yyyy hh:mm
	 *            dd/MM/yyyy hh:mm:ss
	 * @return Date
	 */
	public static Date formatDate(String date, String DATE_FORMAT)
	{
		SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);

		try
		{
			return sdf.parse(date);
		}
		catch (ParseException e)
		{
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 * Transforme de Date para data por extenso
	 * 
	 * @param date1
	 * @param date2
	 * 
	 * @return Ex: 1 ano, 3 meses, 1 hora, 10 segundos
	 */
	public static String dateToString(Date date1, Date date2)
	{
		DateTime start = new DateTime(date2);
		DateTime end =  new DateTime(date1);

		Interval interval = new Interval(start, end);

		Period period = interval.toPeriod(PeriodType.yearMonthDayTime());
		
		StringBuilder sdate = new StringBuilder();
		
		sdate.append((period.getYears() == 0) ? "" : ((period.getYears() == 1) ? "1 ano " : period.getYears() + " anos "));
		sdate.append((period.getMonths() == 0) ? "" : ((period.getMonths() == 1) ? "1 mes " : period.getMonths() + " meses "));
		sdate.append((period.getDays() == 0) ? "" : ((period.getDays() == 1) ? "1 dia " : period.getDays() + " dias "));
		sdate.append((period.getHours() == 0) ? "" : ((period.getHours() == 1) ? "1 hora " : period.getHours() + " horas "));
		sdate.append((period.getMinutes() == 0) ? "" : ((period.getMinutes() == 1) ? "1 minuto " : period.getMinutes() + " minutos "));
		sdate.append((period.getSeconds() == 0) ? "" : ((period.getSeconds() == 1) ? "1 segundo " : period.getSeconds() + " segundos "));
		
		return sdate.toString();
	}
	
}