Java Calendar using Calendar.DAY_OF_WEEK to get the first and the last dates for a particular date

Question

In my application there lies a code which works abruptly sometimes, its about getting a week interval using the java calendar object through Calendar.DAY_OF_WEEK. The code check

Answer 1

The issue is in locale. In English(US), Sunday is the first day of the week. Check this code:

Calendar cal = Calendar.getInstance(Locale.ENGLISH);
    cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
    System.out.println("FirstDayOfWeek="+cal.getFirstDayOfWeek());
    System.out.println(cal.getTime().toString());
    cal = Calendar.getInstance(Locale.FRANCE);
    System.out.println("FirstDayOfWeek="+cal.getFirstDayOfWeek());
    cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
    System.out.println(cal.getTime().toString());