在 Java 中，如何使用系统的默认语言环境(语言)获取星期几(Sun、Mon、...、Sat)的字符串

2022-01-11 00:00:00 calendar dayofweek android java jodatime

最简单的方法:

String[] namesOfDays = new String[7] {
    "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"
};

此方法不使用语言环境.因此，如果系统语言不是英文，这种方法就不能正常工作.

This method does not use Locale. Therefore, if the system's language is not English, this method does not work properly.

使用 Joda 时间，我们可以这样做:

Using Joda time, we can do like this:

String[] namesOfDays = new String[7];
LocalDate now = new LocalDate();

for (int i=0; i<7; i++) {
    /* DateTimeConstants.MONDAY = 1, TUESDAY = 2, ..., SUNDAY = 7 */
    namesOfDays[i] = now.withDayOfWeek((DateTimeConstants.SUNDAY + i - 1) % 7 + 1)
        .dayOfWeek().getAsShortText();
}

但是，此方法使用今天的日期和日历计算，这对于最终目的是无用的.另外，它有点复杂.

However, this method uses today's date and calendar calculations, which are useless for the final purpose. Also, it is a little complicated.

有没有一种简单的方法来获取像 "Sun", "Mon", ..., "Sat" 这样的字符串和系统的默认语言环境?

Is there an easy way to get Strings like "Sun", "Mon", ..., "Sat" with system's default locale?

推荐答案

如果我没有误会你

 calendar.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.SHORT, Locale.US);

是您正在寻找的.这里 你可以找到文档，

is what you are looking for. Here you can find the documentation,

或者您也可以使用 getShortWeekdays()

String[] namesOfDays = DateFormatSymbols.getInstance().getShortWeekdays()

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