dateAndHourSummary.set(Calendar.MILLISECOND, 00);
    public String getSummaryExtraLesson() {        String result = "";        if (getSummaryDate() != null && getSummaryHour() != null) {            Calendar dateAndHourSummary = Calendar.getInstance();            dateAndHourSummary.set(Calendar.DAY_OF_MONTH, summaryDate.get(Calendar.DAY_OF_MONTH));            dateAndHourSummary.set(Calendar.MONTH, summaryDate.get(Calendar.MONTH));            dateAndHourSummary.set(Calendar.YEAR, summaryDate.get(Calendar.YEAR));            dateAndHourSummary.set(Calendar.HOUR_OF_DAY, summaryHour.get(Calendar.HOUR_OF_DAY));            dateAndHourSummary.set(Calendar.MINUTE, summaryHour.get(Calendar.MINUTE));            dateAndHourSummary.set(Calendar.SECOND, 00);            result += new DiaSemana(dateAndHourSummary.get(Calendar.DAY_OF_WEEK)).toString();            result += " ";            result += dateAndHourSummary.get(Calendar.HOUR_OF_DAY);            result += ":";            if (dateAndHourSummary.get(Calendar.MINUTE) < 10) {                result += "0";            }            result += dateAndHourSummary.get(Calendar.MINUTE);        }        return result;    }