Java Utililty Methods Week Day

List of utility methods to do Week Day

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Description

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

Method

String[]getWeekdays(DateFormatSymbols symbols)
get Weekdays 
String[] weekdays = new String[7];
String[] localeWeekdays = symbols.getShortWeekdays();
weekdays[0] = localeWeekdays[Calendar.MONDAY];
weekdays[1] = localeWeekdays[Calendar.TUESDAY];
weekdays[2] = localeWeekdays[Calendar.WEDNESDAY];
weekdays[3] = localeWeekdays[Calendar.THURSDAY];
weekdays[4] = localeWeekdays[Calendar.FRIDAY];
weekdays[5] = localeWeekdays[Calendar.SATURDAY];
...
StringgetWeekDayStr(int dayInWeek)
get Week Day Str 
StringBuffer dateStr = new StringBuffer();
switch (dayInWeek) {
case Calendar.MONDAY:
    dateStr.append("Monday");
    break;
case Calendar.TUESDAY:
    dateStr.append("Tuesday");
    break;
...
int[]getWeekendDays(Locale locale)
get Weekend Days 
if (THU_FRY_WEEKEND_DAYS_COUNTRIES.contains(locale.getCountry())) {
    return new int[] { Calendar.THURSDAY, Calendar.FRIDAY };
} else if (FRY_SUN_WEEKEND_DAYS_COUNTRIES.contains(locale.getCountry())) {
    return new int[] { Calendar.FRIDAY, Calendar.SUNDAY };
} else if (FRY_WEEKEND_DAYS_COUNTRIES.contains(locale.getCountry())) {
    return new int[] { Calendar.FRIDAY };
} else if (SUN_WEEKEND_DAYS_COUNTRIES.contains(locale.getCountry())) {
    return new int[] { Calendar.SUNDAY };
...
DategetWeekFirstDay(Date date)
get Week First Day 
Calendar c = Calendar.getInstance();
c.setTime(date);
int year = c.get(Calendar.YEAR);
int week = c.get(Calendar.WEEK_OF_YEAR);
c.clear();
c.set(Calendar.YEAR, year);
c.set(Calendar.WEEK_OF_YEAR, week);
c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
...
booleanisDayOfWeek(int day)
is Day Of Week 
Calendar strDate = Calendar.getInstance();
if ((strDate.get(Calendar.DAY_OF_WEEK) - 1) == day) {
    return true;
return false;
booleanisDayOfWeek(String str, int dayOfWeek)
is Day Of Week 
int day = getCalendar(str).get(Calendar.DAY_OF_WEEK);
if (day == dayOfWeek)
    return true;
else
    return false;
booleanisFirseDayOfCurrentWeek(Date date)
is Firse Day Of Current Week 
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, 2);
Date firstDate = calendar.getTime();
return sdf.format(date).equals(sdf.format(firstDate));
intisoDayOfWeek(int javaDayOfWeek)
iso Day Of Week 
switch (javaDayOfWeek) {
case Calendar.MONDAY:
    return 1;
case Calendar.TUESDAY:
    return 2;
case Calendar.WEDNESDAY:
    return 3;
case Calendar.THURSDAY:
...
booleanisWeekday(String dateStr, String format)
is Weekday 
Date date = parse(dateStr, format);
return date != null && isWeekday(date);
booleanisWeekendDay(String strDay, DateFormat dateFormatter)
Determines if a day is a day of the weekend, i.e., Saturday or Sunday 
final Calendar Day = Calendar.getInstance();
Day.setTime(dateFormatter.parse(strDay));
final int weekday = Day.get(Calendar.DAY_OF_WEEK);
return weekday == 1 || weekday == 7;