Java Utililty Methods Week Day

return new String[] { getFirstDayOfWeek(str, week), getLastDayOfWeek(str, week) };

Method: get current day of week in Arabia return type int

Calendar calendar = Calendar.getInstance(Locale.getDefault());
return calendar.get(Calendar.DAY_OF_WEEK);

Method: get current day of week in English return type String

String[] dayOfWeek = { "Sunday", "Monday", "Tuseday", "Wednesday", "Thursday", "Friday", "Saturday" };
return dayOfWeek[getCurrentDayOfWeekArabia() - 1];

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date date = null;
if (day != null) {
    try {
        date = format.parse(day);
    } catch (ParseException e) {
        e.printStackTrace();
} else {
    date = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.setTime(date);
return calendar.get(Calendar.WEEK_OF_YEAR);

try {
    java.util.Date date = str2date(curday);
    Calendar rightNow = Calendar.getInstance();
    rightNow.setTime(date);
    return rightNow.get(Calendar.DAY_OF_WEEK);
} catch (Exception e) {
    e.printStackTrace();
    return 1;
...

try {
    java.util.Date date = str2utilDate(curday);
    Calendar rightNow = Calendar.getInstance();
    rightNow.setTime(date);
    int week = rightNow.get(Calendar.DAY_OF_WEEK);
    return week;
} catch (Exception e) {
    System.out.println("DateUtil.getYearWeek(str) Error:e = " + e);
...

Calendar calendar = CALENDAR;
synchronized (calendar) {
    calendar.setTimeInMillis(date);
    int day = calendar.get(Calendar.DAY_OF_WEEK);
    while (day != startOfWeek) {
        calendar.add(Calendar.DATE, increment);
        day = calendar.get(Calendar.DAY_OF_WEEK);
    return startOfDayInMillis(calendar.getTimeInMillis());

Calendar cal = new GregorianCalendar();
cal.roll(Calendar.DAY_OF_YEAR, +7);
return String.valueOf(cal.get(Calendar.DAY_OF_MONTH));

GregorianCalendar cal = new GregorianCalendar();
cal.add(Calendar.DAY_OF_YEAR, nDays);
return cal.get(Calendar.DAY_OF_WEEK);

Calendar date = Calendar.getInstance(Locale.US);
return date.get(Calendar.DAY_OF_WEEK);