Java Utililty Methods Week Day

return getField(date, Locale.getDefault(), Calendar.DAY_OF_WEEK);

Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(date.getTime());
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
int rel = 0;
switch (dayOfWeek) {
case Calendar.MONDAY:
    rel = 1;
    break;
...

String[] weekDays = { "SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
Calendar cal = Calendar.getInstance();
cal.setTime(date);
int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
if (w < 0)
    w = 0;
return weekDays[w];

String dayOfWeek = null;
Calendar c = Calendar.getInstance(Locale.US);
c.setTime(date);
switch (c.get(Calendar.DAY_OF_WEEK)) {
case Calendar.MONDAY:
    dayOfWeek = "Monday";
    break;
case Calendar.TUESDAY:
...

return getField(date, Calendar.DAY_OF_WEEK);

Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setTime(date);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + day - 1);
return c.getTime();

Calendar cal = new GregorianCalendar();
cal.setTime(dt);
int dow = cal.get(Calendar.DAY_OF_WEEK);
switch (dow) {
case 1:
    return "SUN";
case 2:
    return "MON";
...

if (day == 0)
    return start;
Calendar calendar = Calendar.getInstance();
calendar.setTime(start);
calendar.add(Calendar.DAY_OF_YEAR, day);
return calendar.getTime();

int year, month, date;
Calendar cal = Calendar.getInstance();
cal.set(_year, _month - 1, _day);
return cal.get(Calendar.DAY_OF_WEEK);

Calendar calendar = Calendar.getInstance();
if (year > -1) {
    calendar.set(Calendar.YEAR, year);
if (month > -1) {
    month--;
    calendar.set(Calendar.MONTH, month);
if (day > -1) {
    calendar.set(Calendar.DAY_OF_MONTH, day);
return calendar.get(Calendar.DAY_OF_WEEK);