import java.util.spi.CalendarNameProvider; //导入依赖的package包/类
@Override
public String getObject(CalendarNameProvider calendarNameProvider,
                        Locale locale,
                        String requestID, // calendarType
                        Object... params) {
    assert params.length == 4;
    int field = (int) params[0];
    int value = (int) params[1];
    int style = (int) params[2];
    boolean javatime = (boolean) params[3];

    // If javatime is true, resources from CLDR have precedence over JRE
    // native resources.
    if (javatime && calendarNameProvider instanceof CalendarNameProviderImpl) {
        String name;
        name = ((CalendarNameProviderImpl)calendarNameProvider)
                .getJavaTimeDisplayName(requestID, field, value, style, locale);
        return name;
    }
    return calendarNameProvider.getDisplayName(requestID, field, value, style, locale);
}
 

import java.util.spi.CalendarNameProvider; //导入依赖的package包/类
@Override
public CalendarNameProvider getCalendarNameProvider() {
    if (calendarNameProvider == null) {
        CalendarNameProvider provider = AccessController.doPrivileged(
            (PrivilegedAction<CalendarNameProvider>) () ->
                new CalendarNameProviderImpl(
                    getAdapterType(),
                    getLanguageTagSet("FormatData")));

        synchronized (this) {
            if (calendarNameProvider == null) {
                calendarNameProvider = provider;
            }
        }
    }
    return calendarNameProvider;
}
 

import java.util.spi.CalendarNameProvider; //导入依赖的package包/类
@Override
public CalendarNameProvider getCalendarNameProvider() {
    if (calendarNameProvider == null) {
        CalendarNameProvider provider;
        provider = new CalendarNameProviderImpl(getAdapterType(),
                                                getLanguageTagSet("FormatData"));
        synchronized (this) {
            if (calendarNameProvider == null) {
                calendarNameProvider = provider;
            }
        }
    }
    return calendarNameProvider;
}
 

import java.util.spi.CalendarNameProvider; //导入依赖的package包/类
public static String retrieveJavaTimeFieldValueName(String id, int field, int value, int style, Locale locale) {
    LocaleServiceProviderPool pool =
            LocaleServiceProviderPool.getPool(CalendarNameProvider.class);
    String name;
    name = pool.getLocalizedObject(CalendarFieldValueNameGetter.INSTANCE, locale, normalizeCalendarType(id),
                                   field, value, style, true);
    if (name == null) {
        name = pool.getLocalizedObject(CalendarFieldValueNameGetter.INSTANCE, locale, normalizeCalendarType(id),
                                       field, value, style, false);
    }
    return name;
}
 

import java.util.spi.CalendarNameProvider; //导入依赖的package包/类
public static Map<String, Integer> retrieveJavaTimeFieldValueNames(String id, int field, int style, Locale locale) {
    LocaleServiceProviderPool pool =
        LocaleServiceProviderPool.getPool(CalendarNameProvider.class);
    Map<String, Integer> map;
    map = pool.getLocalizedObject(CalendarFieldValueNamesMapGetter.INSTANCE, locale,
                                   normalizeCalendarType(id), field, style, true);
    if (map == null) {
        map = pool.getLocalizedObject(CalendarFieldValueNamesMapGetter.INSTANCE, locale,
                                       normalizeCalendarType(id), field, style, false);
    }
    return map;
}