Java Utililty Methods Calendar Week

List of utility methods to do Calendar Week

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Description

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

Method

intconvertIntToCalendarDayOfWeek(int dayOfWeek)
convert Int To Calendar Day Of Week 
return dayOfWeek == Calendar.SUNDAY ? 7 : dayOfWeek - 1;
DateendOfWeek(Calendar calendar, Date date)
Adjusts the calendar to the end of the current week. 
calendar.setTime(date);
endOfWeek(calendar);
return calendar.getTime();
CalendarfirstDayOfLastWeek(Calendar c)
first Day Of Last Week 
c = (Calendar) c.clone();
c.add(Calendar.WEEK_OF_YEAR, -1);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());
return c;
CalendargetADayOfWeek(Calendar day, int dayOfWeek)
get A Day Of Week 
int week = day.get(Calendar.DAY_OF_WEEK);
if (week == dayOfWeek)
    return day;
int diffDay = dayOfWeek - week;
if (week == Calendar.SUNDAY) {
    diffDay -= 7;
} else if (dayOfWeek == Calendar.SUNDAY) {
    diffDay += 7;
...
intgetDateOfLastDayOfWeekInMonth(Calendar calendar, int dayOfWeek)
get Date Of Last Day Of Week In Month 
int lastDateOfMonth = getLastDateOfMonth(calendar);
Calendar tmpCal = new GregorianCalendar(calendar.getTimeZone());
tmpCal.set(Calendar.YEAR, calendar.get(Calendar.YEAR));
tmpCal.set(Calendar.MONTH, calendar.get(Calendar.MONTH));
tmpCal.set(Calendar.DATE, lastDateOfMonth);
int day = tmpCal.get(Calendar.DAY_OF_WEEK);
if (day == dayOfWeek) {
    return tmpCal.get(Calendar.DATE);
...
CalendargetDayFromPreviousWeek(Calendar requestDate)
get Day From Previous Week 
Calendar result = ((Calendar) requestDate.clone());
result.set(Calendar.DAY_OF_YEAR, (requestDate.get(Calendar.DAY_OF_YEAR) - 7));
return result;
intgetDayOfWeek(Calendar c)
get Day Of Week 
switch (c.get(Calendar.DAY_OF_WEEK)) {
case Calendar.SUNDAY:
    return 0;
case Calendar.MONDAY:
    return 1;
case Calendar.TUESDAY:
    return 2;
case Calendar.WEDNESDAY:
...
intgetDayOfWeek(Calendar cal)
Quick hack to get day of week. 
if (cal.get(Calendar.DAY_OF_WEEK) > 1) {
    return cal.get(Calendar.DAY_OF_WEEK) - 1;
return 7;
intgetDayOfWeek(Calendar date)
Returns the day of week depending if the week starts on sunday or monday. 
int day = date.get(Calendar.DAY_OF_WEEK);
if (getFirstDayOfWeek() == Calendar.SUNDAY)
    return day - 1;
else {
    if (day >= Calendar.MONDAY)
        return day - Calendar.MONDAY;
    else
        return 6;
...
IntegergetDayOfWeekNumber(Calendar cal)
get Day Of Week Number 
return cal.get(Calendar.DAY_OF_WEEK);