Java Utililty Methods Day of Week

List of utility methods to do Day of Week

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Description

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

Method

IntegergetWeek(Date date)
get Week 
if (date == null)
    return null;
Calendar c = Calendar.getInstance();
c.setTime(date);
return chweek[c.get(Calendar.DAY_OF_WEEK)];
intgetWeek(Date dateParam)
get Week 
if (dateParam == null) {
    throw new IllegalArgumentException("The dateParam  must not be null");
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(dateParam.getTime());
return cal.get(Calendar.WEEK_OF_YEAR);
intgetWeek(Date today)
get Week 
Calendar calendar = Calendar.getInstance();
calendar.setTime(today);
switch (calendar.get(Calendar.DAY_OF_WEEK)) {
case 1:
    return 0;
case 2:
    return 1;
case 3:
...
intgetWeek(java.util.Date date)
get Week 
java.util.Calendar c = java.util.Calendar.getInstance();
c.setTime(date);
int dayOfWeek = c.get(java.util.Calendar.DAY_OF_WEEK);
dayOfWeek = dayOfWeek - 1;
if (dayOfWeek == 0) {
    dayOfWeek = Calendar.DAY_OF_WEEK;
return dayOfWeek;
...
IntegergetWeek(java.util.Date today)
getWeek: returns the week of the date 
if (today != null) {
    java.util.Calendar c = java.util.Calendar.getInstance(Locale.GERMANY);
    c.setTime(today);
    return c.get(Calendar.WEEK_OF_YEAR);
} else {
    return null;
DategetWeekBegin(Date date)
get Week Begin 
if (date == null) {
    return null;
Calendar cal = new GregorianCalendar();
cal.setTime(date);
int dw = cal.get(Calendar.DAY_OF_WEEK);
while (dw != Calendar.MONDAY) {
    cal.add(Calendar.DATE, -1);
...
StringgetWeekCategory(final Date date)
get Week Category 
String week = String.valueOf(createDate(date).get(Calendar.WEEK_OF_YEAR));
if (week.length() == 1) {
    week = "0" + week; 
return week;
intgetWeekChineseIndex(Date curDate)
get Week Chinese Index 
Calendar c = Calendar.getInstance();
c.setTime(curDate);
int i = c.get(Calendar.DAY_OF_WEEK);
int s = 0;
if (i == 1) {
    s = 7;
} else {
    s = i - 1;
...
String[]getWeekDate(String date)
get Week Date 
String[] weekDays = new String[7];
weekDays[0] = getMondayDate(date);
weekDays[1] = getWeekDays(weekDays[0], 1);
weekDays[2] = getWeekDays(weekDays[0], 2);
weekDays[3] = getWeekDays(weekDays[0], 3);
weekDays[4] = getWeekDays(weekDays[0], 4);
weekDays[5] = getWeekDays(weekDays[0], 5);
weekDays[6] = getWeekDays(weekDays[0], 6);
...
ArrayListgetWeekDateList(Date today, int index)
Gets week date list. 
ArrayList<Date> list = new ArrayList<Date>();
Calendar calendar = Calendar.getInstance();
calendar.setTime(today);
if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
    calendar.add(Calendar.WEEK_OF_YEAR, -1);
calendar.add(Calendar.WEEK_OF_YEAR, index);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
...