java.time.temporal.ChronoField#DAY_OF_YEAR源码实例Demo

private static ChronoField getPrecision(String text) {
    if (text.endsWith("T")) {
        return ChronoField.DAY_OF_YEAR;
    }

    String time = text.contains("T") ? text.substring(text.indexOf("T") + 1) : text;

    if (time.contains("+") || time.contains("-") || time.endsWith("Z")) {
        return ChronoField.OFFSET_SECONDS;
    }

    int count = count(time, ':');

    switch (count) {
    case 0:
        return ChronoField.HOUR_OF_DAY;
    case 1:
        return ChronoField.MINUTE_OF_HOUR;
    case 2:
        return ChronoField.MICRO_OF_SECOND;
    }

    throw new IllegalArgumentException(text);
}
 

@Override
public boolean accept(ZonedDateTime target, ZonedDateTime now) {
    TemporalField field = ChronoField.DAY_OF_YEAR;
    return now.get(field) == target.get(field);
}
 

@Test
public void test_with_TemporalField_long_invalidField() {
    ChronoField[] invalidFields = new ChronoField[] {
            ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH,
            ChronoField.ALIGNED_DAY_OF_WEEK_IN_YEAR,
            ChronoField.ALIGNED_WEEK_OF_MONTH,
            ChronoField.ALIGNED_WEEK_OF_YEAR,
            ChronoField.AMPM_OF_DAY,
            ChronoField.CLOCK_HOUR_OF_AMPM,
            ChronoField.CLOCK_HOUR_OF_DAY,
            ChronoField.DAY_OF_MONTH,
            ChronoField.DAY_OF_WEEK,
            ChronoField.DAY_OF_YEAR,
            ChronoField.EPOCH_DAY,
            ChronoField.HOUR_OF_AMPM,
            ChronoField.HOUR_OF_DAY,
            ChronoField.INSTANT_SECONDS,
            ChronoField.MICRO_OF_DAY,
            ChronoField.MICRO_OF_SECOND,
            ChronoField.MILLI_OF_DAY,
            ChronoField.MILLI_OF_SECOND,
            ChronoField.MINUTE_OF_DAY,
            ChronoField.MINUTE_OF_HOUR,
            ChronoField.NANO_OF_DAY,
            ChronoField.NANO_OF_SECOND,
            ChronoField.OFFSET_SECONDS,
            ChronoField.SECOND_OF_DAY,
            ChronoField.SECOND_OF_MINUTE,
    };

    YearMonth ym = YearMonth.of(2000, Month.JANUARY);
    for (ChronoField invalidField : invalidFields) {
        // Get a valid value to ensure we fail to due invalid field, not due to invalid value.
        long value = invalidField.range().getMinimum();
        try {
            ym.with(invalidField, value);
            fail("TemporalField.with() should not accept " + invalidField);
        } catch (UnsupportedTemporalTypeException expected) {
        }
    }

}