style and
* <code>locale. If no string representation is
* applicable, <code>null is returned.
*
* <p>{@code field} is a {@code Calendar} field index, such as {@link
* Calendar#MONTH}. The time zone fields, {@link Calendar#ZONE_OFFSET} and
* {@link Calendar#DST_OFFSET}, are <em>not supported by this
* method. {@code null} must be returned if any time zone fields are
* specified.
*
* <p>{@code value} is the numeric representation of the {@code field} value.
* For example, if {@code field} is {@link Calendar#DAY_OF_WEEK}, the valid
* values are {@link Calendar#SUNDAY} to {@link Calendar#SATURDAY}
* (inclusive).
*
* <p>{@code style} gives the style of the string representation. It is one
* of {@link Calendar#SHORT_FORMAT} ({@link Calendar#SHORT SHORT}),
* {@link Calendar#SHORT_STANDALONE}, {@link Calendar#LONG_FORMAT}
* ({@link Calendar#LONG LONG}), {@link Calendar#LONG_STANDALONE},
* {@link Calendar#NARROW_FORMAT}, or {@link Calendar#NARROW_STANDALONE}.
*
* <p>For example, the following call will return {@code "Sunday"}.
* <pre>
* getDisplayName("gregory", Calendar.DAY_OF_WEEK, Calendar.SUNDAY,
* Calendar.LONG_STANDALONE, Locale.ENGLISH);
* </pre>
*
* @param calendarType
* the calendar type. (Any calendar type given by {@code locale}
* is ignored.)
* @param field
* the {@code Calendar} field index,
* such as {@link Calendar#DAY_OF_WEEK}
* @param value
* the value of the {@code Calendar field},
* such as {@link Calendar#MONDAY}
* @param style
* the string representation style: one of {@link
* Calendar#SHORT_FORMAT} ({@link Calendar#SHORT SHORT}),
* {@link Calendar#SHORT_STANDALONE}, {@link
* Calendar#LONG_FORMAT} ({@link Calendar#LONG LONG}),
* {@link Calendar#LONG_STANDALONE},
* {@link Calendar#NARROW_FORMAT},
* or {@link Calendar#NARROW_STANDALONE}
* @param locale
* the desired locale
* @return the string representation of the {@code field value}, or {@code
* null} if the string representation is not applicable or
* the given calendar type is unknown
* @throws IllegalArgumentException
* if {@code field} or {@code style} is invalid
* @throws NullPointerException if {@code locale} is {@code null}
* @see TimeZoneNameProvider
* @see java.util.Calendar#get(int)
* @see java.util.Calendar#getDisplayName(int, int, Locale)
*/
public abstract String getDisplayName(String calendarType,
int field, int value,
int style, Locale locale);
/**
* Returns a {@code Map} containing all string representations (display
* names) of the {@code Calendar} {@code field} in the given {@code style}
* and {@code locale} and their corresponding field values.
*
* <p>{@code field} is a {@code Calendar} field index, such as {@link
* Calendar#MONTH}. The time zone fields, {@link Calendar#ZONE_OFFSET} and
* {@link Calendar#DST_OFFSET}, are <em>not supported by this
* method. {@code null} must be returned if any time zone fields are specified.
*
* <p>{@code style} gives the style of the string representation. It must be
* one of {@link Calendar#ALL_STYLES}, {@link Calendar#SHORT_FORMAT} ({@link
* Calendar#SHORT SHORT}), {@link Calendar#SHORT_STANDALONE}, {@link
* Calendar#LONG_FORMAT} ({@link Calendar#LONG LONG}), {@link
* Calendar#LONG_STANDALONE}, {@link Calendar#NARROW_FORMAT}, or
* {@link Calendar#NARROW_STANDALONE}. Note that narrow names may
* not be unique due to use of single characters, such as "S" for Sunday
* and Saturday, and that no narrow names are included in that case.
*
* <p>For example, the following call will return a {@code Map} containing
* {@code "January"} to {@link Calendar#JANUARY}, {@code "Jan"} to {@link
* Calendar#JANUARY}, {@code "February"} to {@link Calendar#FEBRUARY},
* {@code "Feb"} to {@link Calendar#FEBRUARY}, and so on.
* <pre>
* getDisplayNames("gregory", Calendar.MONTH, Calendar.ALL_STYLES, Locale.ENGLISH);
* </pre>
*
* @param calendarType
* the calendar type. (Any calendar type given by {@code locale}
* is ignored.)
* @param field
* the calendar field for which the display names are returned
* @param style
* the style applied to the display names; one of
* {@link Calendar#ALL_STYLES}, {@link Calendar#SHORT_FORMAT}
* ({@link Calendar#SHORT SHORT}), {@link
* Calendar#SHORT_STANDALONE}, {@link Calendar#LONG_FORMAT}
* ({@link Calendar#LONG LONG}), {@link Calendar#LONG_STANDALONE},
* {@link Calendar#NARROW_FORMAT},
* or {@link Calendar#NARROW_STANDALONE}
* @param locale
* the desired locale
* @return a {@code Map} containing all display names of {@code field} in
* {@code style} and {@code locale} and their {@code field} values,
* or {@code null} if no display names are defined for {@code field}
* @throws NullPointerException
* if {@code locale} is {@code null}
* @see Calendar#getDisplayNames(int, int, Locale)
*/
public abstract Map<String, Integer> getDisplayNames(String calendarType,
int field, int style,
Locale locale);
}
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Java example source code file (CalendarNameProvider.java)
The CalendarNameProvider.java Java example source code/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util.spi;
import java.util.Calendar;
import java.util.Locale;
import java.util.Map;
/**
* An abstract class for service providers that provide localized string
* representations (display names) of {@code Calendar} field values.
*
* <p>Calendar Types
*
* <p>Calendar types are used to specify calendar systems for which the {@link
* #getDisplayName(String, int, int, int, Locale) getDisplayName} and {@link
* #getDisplayNames(String, int, int, Locale) getDisplayNames} methods provide
* calendar field value names. See {@link Calendar#getCalendarType()} for details.
*
* <p>Calendar Fields
*
* <p>Calendar fields are specified with the constants defined in {@link
* Calendar}. The following are calendar-common fields and their values to be
* supported for each calendar system.
*
* <table style="border-bottom:1px solid" border="1" cellpadding="3" cellspacing="0" summary="Field values">
* <tr>
* <th>Field
* <th>Value
* <th>Description
* </tr>
* <tr>
* <td valign="top">{@link Calendar#MONTH} |
