CODEWITHSUNDEEP
javadatedatetimedayofweekweekend
Bartek
Bartek

Reputation: 1337

How to check if a certain date is a weekend taking into account the current locale in Java?

I'm writing a program in Java and I need to determine whether a certain date is weekend or not. However, I need to take into account that in various countries weekends fall on different days, e.g. in Israel it's Friday and Saturday wheras in some islamic countries it's Thursday and Friday. For more details you can check out this Wikipedia article. Is there a simple way to do it?

Upvotes: 5

Views: 3306

Answers (4)

João Rebelo
João Rebelo

Reputation: 158

Based on the wiki you've sent I've solved it for myself with the following code:

private static final List<String> sunWeekendDaysCountries = Arrays.asList(new String[]{"GQ", "IN", "TH", "UG"});
private static final List<String> fryWeekendDaysCountries = Arrays.asList(new String[]{"DJ", "IR"});
private static final List<String> frySunWeekendDaysCountries = Arrays.asList(new String[]{"BN"});
private static final List<String> thuFryWeekendDaysCountries = Arrays.asList(new String[]{"AF"});
private static final List<String> frySatWeekendDaysCountries = Arrays.asList(new String[]{"AE", "DZ", "BH", "BD", "EG", "IQ", "IL", "JO", "KW", "LY", "MV", "MR", "OM", "PS", "QA", "SA", "SD", "SY", "YE"});

public static int[] getWeekendDays(Locale locale) {
    if (thuFryWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.THURSDAY, Calendar.FRIDAY};
    }
    else if (frySunWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY, Calendar.SUNDAY};
    }
    else if (fryWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY};
    }
    else if (sunWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.SUNDAY};
    }
    else if (frySatWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY, Calendar.SATURDAY};
    }
    else {
        return new int[]{Calendar.SATURDAY, Calendar.SUNDAY};
    }
}

Upvotes: 4

Shamim Ahmmed
Shamim Ahmmed

Reputation: 8383

The library, Jollyday could be useful to calculate holidays , http://jollyday.sourceforge.net/index.html

Upvotes: -1

drvdijk
drvdijk

Reputation: 5554

The Java Calendar class has this functionality, the getFirstDayOfWeek method. Quote from the Calendar documentation:

Calendar defines a locale-specific seven day week using two parameters: the first day of the week and the minimal days in first week (from 1 to 7). These numbers are taken from the locale resource data when a Calendar is constructed. They may also be specified explicitly through the methods for setting their values.

So with this information, you are be able to calculate if a day is a weekend day or not.

    final Calendar cal = Calendar.getInstance(new Locale("he_IL"));
    System.out.println("Sunday is the first day of the week in he_IL? " + (Calendar.SUNDAY == cal.getFirstDayOfWeek()));

Output:

Sunday is the first day of the week in he_IL? true

Upvotes: -1

Orch
Orch

Reputation: 885

You can get the day of week (see: How to determine day of week by passing specific date?)

Then just check if that day is a weekend based on whatever country is selected.

Upvotes: -1

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