Java Utililty Methods Calendar Day

List of utility methods to do Calendar Day

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Description

The list of methods to do Calendar Day are organized into topic(s).

Method

intdate2day(Calendar cal)
dateday 
return cal.get(Calendar.YEAR) * 10000 + (cal.get(Calendar.MONTH) + 1) * 100
        + cal.get(Calendar.DAY_OF_MONTH);
intday(Calendar calendar)
day 
return calendar.get(Calendar.DAY_OF_MONTH);
intday(Calendar date)
day 
return date.get(Calendar.DAY_OF_MONTH);
Calendarday2date(int day, Calendar cal)
daydate 
cal.clear();
cal.set(Calendar.YEAR, day / 10000);
cal.set(Calendar.MONTH, (day % 10000) / 100 - 1);
cal.set(Calendar.DAY_OF_MONTH, day % 100);
return cal;
CalendardayBegin(Calendar cal)
Truncates time to zero, keeps date. 
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal;
voiddayBegin(Calendar calendar)
day Begin 
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
intdayDistance(Calendar date1, Calendar date2)
day Distance 
int noDays = 0;
if (date1.before(date2)) {
    Calendar temp = Calendar.getInstance();
    temp.setTimeInMillis(date1.getTimeInMillis());
    while (temp.before(date2)) {
        temp.add(Calendar.DATE, 1);
        noDays++;
} else if (date1.after(date2)) {
    Calendar temp = Calendar.getInstance();
    temp.setTimeInMillis(date2.getTimeInMillis());
    while (temp.before(date1)) {
        temp.add(Calendar.DATE, 1);
        noDays++;
return noDays;
CalendardayEndTime(Calendar calendar)
Changes input calendar by resetting time fields to the end of day. 
calendar.set(Calendar.HOUR, calendar.getMaximum(Calendar.HOUR));
calendar.set(Calendar.MINUTE, calendar.getMaximum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMaximum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMaximum(Calendar.MILLISECOND));
return calendar;
voiddayFloor(Calendar calendar)
day Floor 
hourFloor(calendar);
calendar.set(Calendar.HOUR_OF_DAY, 0);
IterabledayIterable(Calendar from, Calendar to)
returns an interable of canonical days in (inclusive) range of days 
final Calendar nextDay = getCanonicalDay(from);
final Calendar upto = getCanonicalDay(to);
return new Iterable<Calendar>() {
    public Iterator<Calendar> iterator() {
        return new Iterator<Calendar>() {
            public boolean hasNext() {
                return !nextDay.after(upto);
            public Calendar next() {
                Calendar ret = getCanonicalDay(nextDay);
                nextDay.add(Calendar.DAY_OF_YEAR, 1);
                return ret;
            public void remove() {
        };
};