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	/*
	* Copyright (c) 1996, 2016, 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.
	*/

	/*
	* (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
	* (C) Copyright IBM Corp. 1996 - All Rights Reserved
	*
	* The original version of this source code and documentation is copyrighted
	* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
	* materials are provided under terms of a License Agreement between Taligent
	* and Sun. This technology is protected by multiple US and International
	* patents. This notice and attribution to Taligent may not be removed.
	* Taligent is a registered trademark of Taligent, Inc.
	*
	*/

	package java.text;

	import java.io.IOException;
	import java.io.ObjectOutputStream;
	import java.io.Serializable;
	import java.lang.ref.SoftReference;
	import java.text.spi.DateFormatSymbolsProvider;
	import java.util.Arrays;
	import java.util.Locale;
	import java.util.Objects;
	import java.util.ResourceBundle;
	import java.util.concurrent.ConcurrentHashMap;
	import java.util.concurrent.ConcurrentMap;
	import sun.util.locale.provider.LocaleProviderAdapter;
	import sun.util.locale.provider.LocaleServiceProviderPool;
	import sun.util.locale.provider.ResourceBundleBasedAdapter;
	import sun.util.locale.provider.TimeZoneNameUtility;

	/**
	* <code>DateFormatSymbols</code> is a public class for encapsulating
	* localizable date-time formatting data, such as the names of the
	* months, the names of the days of the week, and the time zone data.
	* <code>SimpleDateFormat</code> uses
	* <code>DateFormatSymbols</code> to encapsulate this information.
	*
	* <p>
	* Typically you shouldn't use <code>DateFormatSymbols</code> directly.
	* Rather, you are encouraged to create a date-time formatter with the
	* <code>DateFormat</code> class's factory methods: <code>getTimeInstance</code>,
	* <code>getDateInstance</code>, or <code>getDateTimeInstance</code>.
	* These methods automatically create a <code>DateFormatSymbols</code> for
	* the formatter so that you don't have to. After the
	* formatter is created, you may modify its format pattern using the
	* <code>setPattern</code> method. For more information about
	* creating formatters using <code>DateFormat</code>'s factory methods,
	* see {@link DateFormat}.
	*
	* <p>
	* If you decide to create a date-time formatter with a specific
	* format pattern for a specific locale, you can do so with:
	* <blockquote>
	* <pre>
	* new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale)).
	* </pre>
	* </blockquote>
	*
	* <p>
	* <code>DateFormatSymbols</code> objects are cloneable. When you obtain
	* a <code>DateFormatSymbols</code> object, feel free to modify the
	* date-time formatting data. For instance, you can replace the localized
	* date-time format pattern characters with the ones that you feel easy
	* to remember. Or you can change the representative cities
	* to your favorite ones.
	*
	* <p>
	* New <code>DateFormatSymbols</code> subclasses may be added to support
	* <code>SimpleDateFormat</code> for date-time formatting for additional locales.

	* @see DateFormat
	* @see SimpleDateFormat
	* @see java.util.SimpleTimeZone
	* @author Chen-Lieh Huang
	*/
	public class DateFormatSymbols implements Serializable, Cloneable {

	/**
	* Construct a DateFormatSymbols object by loading format data from
	* resources for the default {@link java.util.Locale.Category#FORMAT FORMAT}
	* locale. This constructor can only
	* construct instances for the locales supported by the Java
	* runtime environment, not for those supported by installed
	* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
	* implementations. For full locale coverage, use the
	* {@link #getInstance(Locale) getInstance} method.
	* <p>This is equivalent to calling
	* {@link #DateFormatSymbols(Locale)
	* DateFormatSymbols(Locale.getDefault(Locale.Category.FORMAT))}.
	* @see #getInstance()
	* @see java.util.Locale#getDefault(java.util.Locale.Category)
	* @see java.util.Locale.Category#FORMAT
	* @exception java.util.MissingResourceException
	* if the resources for the default locale cannot be
	* found or cannot be loaded.
	*/
	public DateFormatSymbols()
	{
	initializeData(Locale.getDefault(Locale.Category.FORMAT));
	}

	/**
	* Construct a DateFormatSymbols object by loading format data from
	* resources for the given locale. This constructor can only
	* construct instances for the locales supported by the Java
	* runtime environment, not for those supported by installed
	* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
	* implementations. For full locale coverage, use the
	* {@link #getInstance(Locale) getInstance} method.
	*
	* @param locale the desired locale
	* @see #getInstance(Locale)
	* @exception java.util.MissingResourceException
	* if the resources for the specified locale cannot be
	* found or cannot be loaded.
	*/
	public DateFormatSymbols(Locale locale)
	{
	initializeData(locale);
	}

	/**
	* Constructs an uninitialized DateFormatSymbols.
	*/
	private DateFormatSymbols(boolean flag) {
	}

	/**
	* Era strings. For example: "AD" and "BC". An array of 2 strings,
	* indexed by <code>Calendar.BC</code> and <code>Calendar.AD</code>.
	* @serial
	*/
	String eras[] = null;

	/**
	* Month strings. For example: "January", "February", etc. An array
	* of 13 strings (some calendars have 13 months), indexed by
	* <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc.
	* @serial
	*/
	String months[] = null;

	/**
	* Short month strings. For example: "Jan", "Feb", etc. An array of
	* 13 strings (some calendars have 13 months), indexed by
	* <code>Calendar.JANUARY</code>, <code>Calendar.FEBRUARY</code>, etc.

	* @serial
	*/
	String shortMonths[] = null;

	/**
	* Weekday strings. For example: "Sunday", "Monday", etc. An array
	* of 8 strings, indexed by <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc.
	* The element <code>weekdays[0]</code> is ignored.
	* @serial
	*/
	String weekdays[] = null;

	/**
	* Short weekday strings. For example: "Sun", "Mon", etc. An array
	* of 8 strings, indexed by <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc.
	* The element <code>shortWeekdays[0]</code> is ignored.
	* @serial
	*/
	String shortWeekdays[] = null;

	/**
	* AM and PM strings. For example: "AM" and "PM". An array of
	* 2 strings, indexed by <code>Calendar.AM</code> and
	* <code>Calendar.PM</code>.
	* @serial
	*/
	String ampms[] = null;

	/**
	* Localized names of time zones in this locale. This is a
	* two-dimensional array of strings of size <em>n</em> by <em>m</em>,
	* where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
	* entry containing the localized names for a single <code>TimeZone</code>.
	* Each such row contains (with <code>i</code> ranging from
	* 0..<em>n</em>-1):
	* <ul>
	* <li><code>zoneStrings[i][0]</code> - time zone ID</li>
	* <li><code>zoneStrings[i][1]</code> - long name of zone in standard
	* time</li>
	* <li><code>zoneStrings[i][2]</code> - short name of zone in
	* standard time</li>
	* <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
	* saving time</li>
	* <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
	* saving time</li>
	* </ul>
	* The zone ID is <em>not</em> localized; it's one of the valid IDs of
	* the {@link java.util.TimeZone TimeZone} class that are not
	* <a href="../java/util/TimeZone.html#CustomID">custom IDs</a>.
	* All other entries are localized names.
	* @see java.util.TimeZone
	* @serial
	*/
	String zoneStrings[][] = null;

	/**
	* Indicates that zoneStrings is set externally with setZoneStrings() method.
	*/
	transient boolean isZoneStringsSet = false;

	/**
	* Unlocalized date-time pattern characters. For example: 'y', 'd', etc.
	* All locales use the same these unlocalized pattern characters.
	*/
	static final String patternChars = "GyMdkHmsSEDFwWahKzZYuXL";

	static final int PATTERN_ERA = 0; // G
	static final int PATTERN_YEAR = 1; // y
	static final int PATTERN_MONTH = 2; // M
	static final int PATTERN_DAY_OF_MONTH = 3; // d
	static final int PATTERN_HOUR_OF_DAY1 = 4; // k
	static final int PATTERN_HOUR_OF_DAY0 = 5; // H
	static final int PATTERN_MINUTE = 6; // m
	static final int PATTERN_SECOND = 7; // s
	static final int PATTERN_MILLISECOND = 8; // S
	static final int PATTERN_DAY_OF_WEEK = 9; // E
	static final int PATTERN_DAY_OF_YEAR = 10; // D
	static final int PATTERN_DAY_OF_WEEK_IN_MONTH = 11; // F
	static final int PATTERN_WEEK_OF_YEAR = 12; // w
	static final int PATTERN_WEEK_OF_MONTH = 13; // W
	static final int PATTERN_AM_PM = 14; // a
	static final int PATTERN_HOUR1 = 15; // h
	static final int PATTERN_HOUR0 = 16; // K
	static final int PATTERN_ZONE_NAME = 17; // z
	static final int PATTERN_ZONE_VALUE = 18; // Z
	static final int PATTERN_WEEK_YEAR = 19; // Y
	static final int PATTERN_ISO_DAY_OF_WEEK = 20; // u
	static final int PATTERN_ISO_ZONE = 21; // X
	static final int PATTERN_MONTH_STANDALONE = 22; // L

	/**
	* Localized date-time pattern characters. For example, a locale may
	* wish to use 'u' rather than 'y' to represent years in its date format
	* pattern strings.
	* This string must be exactly 18 characters long, with the index of
	* the characters described by <code>DateFormat.ERA_FIELD</code>,
	* <code>DateFormat.YEAR_FIELD</code>, etc. Thus, if the string were
	* "Xz...", then localized patterns would use 'X' for era and 'z' for year.
	* @serial
	*/
	String localPatternChars = null;

	/**
	* The locale which is used for initializing this DateFormatSymbols object.
	*
	* @since 1.6
	* @serial
	*/
	Locale locale = null;

	/* use serialVersionUID from JDK 1.1.4 for interoperability */
	static final long serialVersionUID = -5987973545549424702L;

	/**
	* Returns an array of all locales for which the
	* <code>getInstance</code> methods of this class can return
	* localized instances.
	* The returned array represents the union of locales supported by the
	* Java runtime and by installed
	* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
	* implementations. It must contain at least a <code>Locale</code>
	* instance equal to {@link java.util.Locale#US Locale.US}.
	*
	* @return An array of locales for which localized
	* <code>DateFormatSymbols</code> instances are available.
	* @since 1.6
	*/
	public static Locale[] getAvailableLocales() {
	LocaleServiceProviderPool pool=
	LocaleServiceProviderPool.getPool(DateFormatSymbolsProvider.class);
	return pool.getAvailableLocales();
	}

	/**
	* Gets the <code>DateFormatSymbols</code> instance for the default
	* locale. This method provides access to <code>DateFormatSymbols</code>
	* instances for locales supported by the Java runtime itself as well
	* as for those supported by installed
	* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
	* implementations.
	* <p>This is equivalent to calling {@link #getInstance(Locale)
	* getInstance(Locale.getDefault(Locale.Category.FORMAT))}.
	* @see java.util.Locale#getDefault(java.util.Locale.Category)
	* @see java.util.Locale.Category#FORMAT
	* @return a <code>DateFormatSymbols</code> instance.
	* @since 1.6
	*/
	public static final DateFormatSymbols getInstance() {
	return getInstance(Locale.getDefault(Locale.Category.FORMAT));
	}

	/**
	* Gets the <code>DateFormatSymbols</code> instance for the specified
	* locale. This method provides access to <code>DateFormatSymbols</code>
	* instances for locales supported by the Java runtime itself as well
	* as for those supported by installed
	* {@link java.text.spi.DateFormatSymbolsProvider DateFormatSymbolsProvider}
	* implementations.
	* @param locale the given locale.
	* @return a <code>DateFormatSymbols</code> instance.
	* @exception NullPointerException if <code>locale</code> is null
	* @since 1.6
	*/
	public static final DateFormatSymbols getInstance(Locale locale) {
	DateFormatSymbols dfs = getProviderInstance(locale);
	if (dfs != null) {
	return dfs;
	}
	throw new RuntimeException("DateFormatSymbols instance creation failed.");
	}

	/**
	* Returns a DateFormatSymbols provided by a provider or found in
	* the cache. Note that this method returns a cached instance,
	* not its clone. Therefore, the instance should never be given to
	* an application.
	*/
	static final DateFormatSymbols getInstanceRef(Locale locale) {
	DateFormatSymbols dfs = getProviderInstance(locale);
	if (dfs != null) {
	return dfs;
	}
	throw new RuntimeException("DateFormatSymbols instance creation failed.");
	}

	private static DateFormatSymbols getProviderInstance(Locale locale) {
	LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, locale);
	DateFormatSymbolsProvider provider = adapter.getDateFormatSymbolsProvider();
	DateFormatSymbols dfsyms = provider.getInstance(locale);
	if (dfsyms == null) {
	provider = LocaleProviderAdapter.forJRE().getDateFormatSymbolsProvider();
	dfsyms = provider.getInstance(locale);
	}
	return dfsyms;
	}

	/**
	* Gets era strings. For example: "AD" and "BC".
	* @return the era strings.
	*/
	public String[] getEras() {
	return Arrays.copyOf(eras, eras.length);
	}

	/**
	* Sets era strings. For example: "AD" and "BC".
	* @param newEras the new era strings.
	*/
	public void setEras(String[] newEras) {
	eras = Arrays.copyOf(newEras, newEras.length);
	cachedHashCode = 0;
	}

	/**
	* Gets month strings. For example: "January", "February", etc.
	*
	* <p>If the language requires different forms for formatting and
	* stand-alone usages, this method returns month names in the
	* formatting form. For example, the preferred month name for
	* January in the Czech language is <em>ledna</em> in the
	* formatting form, while it is <em>leden</em> in the stand-alone
	* form. This method returns {@code "ledna"} in this case. Refer
	* to the <a href="http://unicode.org/reports/tr35/#Calendar_Elements">
	* Calendar Elements in the Unicode Locale Data Markup Language
	* (LDML) specification</a> for more details.
	*
	* @return the month strings.
	*/
	public String[] getMonths() {
	return Arrays.copyOf(months, months.length);
	}

	/**
	* Sets month strings. For example: "January", "February", etc.
	* @param newMonths the new month strings.
	*/
	public void setMonths(String[] newMonths) {
	months = Arrays.copyOf(newMonths, newMonths.length);
	cachedHashCode = 0;
	}

	/**
	* Gets short month strings. For example: "Jan", "Feb", etc.
	*
	* <p>If the language requires different forms for formatting and
	* stand-alone usages, This method returns short month names in
	* the formatting form. For example, the preferred abbreviation
	* for January in the Catalan language is <em>de gen.</em> in the
	* formatting form, while it is <em>gen.</em> in the stand-alone
	* form. This method returns {@code "de gen."} in this case. Refer
	* to the <a href="http://unicode.org/reports/tr35/#Calendar_Elements">
	* Calendar Elements in the Unicode Locale Data Markup Language
	* (LDML) specification</a> for more details.
	*
	* @return the short month strings.
	*/
	public String[] getShortMonths() {
	return Arrays.copyOf(shortMonths, shortMonths.length);
	}

	/**
	* Sets short month strings. For example: "Jan", "Feb", etc.
	* @param newShortMonths the new short month strings.
	*/
	public void setShortMonths(String[] newShortMonths) {
	shortMonths = Arrays.copyOf(newShortMonths, newShortMonths.length);
	cachedHashCode = 0;
	}

	/**
	* Gets weekday strings. For example: "Sunday", "Monday", etc.
	* @return the weekday strings. Use <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc. to index the result array.
	*/
	public String[] getWeekdays() {
	return Arrays.copyOf(weekdays, weekdays.length);
	}

	/**
	* Sets weekday strings. For example: "Sunday", "Monday", etc.
	* @param newWeekdays the new weekday strings. The array should
	* be indexed by <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc.
	*/
	public void setWeekdays(String[] newWeekdays) {
	weekdays = Arrays.copyOf(newWeekdays, newWeekdays.length);
	cachedHashCode = 0;
	}

	/**
	* Gets short weekday strings. For example: "Sun", "Mon", etc.
	* @return the short weekday strings. Use <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc. to index the result array.
	*/
	public String[] getShortWeekdays() {
	return Arrays.copyOf(shortWeekdays, shortWeekdays.length);
	}

	/**
	* Sets short weekday strings. For example: "Sun", "Mon", etc.
	* @param newShortWeekdays the new short weekday strings. The array should
	* be indexed by <code>Calendar.SUNDAY</code>,
	* <code>Calendar.MONDAY</code>, etc.
	*/
	public void setShortWeekdays(String[] newShortWeekdays) {
	shortWeekdays = Arrays.copyOf(newShortWeekdays, newShortWeekdays.length);
	cachedHashCode = 0;
	}

	/**
	* Gets ampm strings. For example: "AM" and "PM".
	* @return the ampm strings.
	*/
	public String[] getAmPmStrings() {
	return Arrays.copyOf(ampms, ampms.length);
	}

	/**
	* Sets ampm strings. For example: "AM" and "PM".
	* @param newAmpms the new ampm strings.
	*/
	public void setAmPmStrings(String[] newAmpms) {
	ampms = Arrays.copyOf(newAmpms, newAmpms.length);
	cachedHashCode = 0;
	}

	/**
	* Gets time zone strings. Use of this method is discouraged; use
	* {@link java.util.TimeZone#getDisplayName() TimeZone.getDisplayName()}
	* instead.
	* <p>
	* The value returned is a
	* two-dimensional array of strings of size <em>n</em> by <em>m</em>,
	* where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
	* entry containing the localized names for a single <code>TimeZone</code>.
	* Each such row contains (with <code>i</code> ranging from
	* 0..<em>n</em>-1):
	* <ul>
	* <li><code>zoneStrings[i][0]</code> - time zone ID</li>
	* <li><code>zoneStrings[i][1]</code> - long name of zone in standard
	* time</li>
	* <li><code>zoneStrings[i][2]</code> - short name of zone in
	* standard time</li>
	* <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
	* saving time</li>
	* <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
	* saving time</li>
	* </ul>
	* The zone ID is <em>not</em> localized; it's one of the valid IDs of
	* the {@link java.util.TimeZone TimeZone} class that are not
	* <a href="../util/TimeZone.html#CustomID">custom IDs</a>.
	* All other entries are localized names. If a zone does not implement
	* daylight saving time, the daylight saving time names should not be used.
	* <p>
	* If {@link #setZoneStrings(String[][]) setZoneStrings} has been called
	* on this <code>DateFormatSymbols</code> instance, then the strings
	* provided by that call are returned. Otherwise, the returned array
	* contains names provided by the Java runtime and by installed
	* {@link java.util.spi.TimeZoneNameProvider TimeZoneNameProvider}
	* implementations.
	*
	* @return the time zone strings.
	* @see #setZoneStrings(String[][])
	*/
	public String[][] getZoneStrings() {
	return getZoneStringsImpl(true);
	}

	/**
	* Sets time zone strings. The argument must be a
	* two-dimensional array of strings of size <em>n</em> by <em>m</em>,
	* where <em>m</em> is at least 5. Each of the <em>n</em> rows is an
	* entry containing the localized names for a single <code>TimeZone</code>.
	* Each such row contains (with <code>i</code> ranging from
	* 0..<em>n</em>-1):
	* <ul>
	* <li><code>zoneStrings[i][0]</code> - time zone ID</li>
	* <li><code>zoneStrings[i][1]</code> - long name of zone in standard
	* time</li>
	* <li><code>zoneStrings[i][2]</code> - short name of zone in
	* standard time</li>
	* <li><code>zoneStrings[i][3]</code> - long name of zone in daylight
	* saving time</li>
	* <li><code>zoneStrings[i][4]</code> - short name of zone in daylight
	* saving time</li>
	* </ul>
	* The zone ID is <em>not</em> localized; it's one of the valid IDs of
	* the {@link java.util.TimeZone TimeZone} class that are not
	* <a href="../util/TimeZone.html#CustomID">custom IDs</a>.
	* All other entries are localized names.
	*
	* @param newZoneStrings the new time zone strings.
	* @exception IllegalArgumentException if the length of any row in
	* <code>newZoneStrings</code> is less than 5
	* @exception NullPointerException if <code>newZoneStrings</code> is null
	* @see #getZoneStrings()
	*/
	public void setZoneStrings(String[][] newZoneStrings) {
	String[][] aCopy = new String[newZoneStrings.length][];
	for (int i = 0; i < newZoneStrings.length; ++i) {
	int len = newZoneStrings[i].length;
	if (len < 5) {
	throw new IllegalArgumentException();
	}
	aCopy[i] = Arrays.copyOf(newZoneStrings[i], len);
	}
	zoneStrings = aCopy;
	isZoneStringsSet = true;
	cachedHashCode = 0;
	}

	/**
	* Gets localized date-time pattern characters. For example: 'u', 't', etc.
	* @return the localized date-time pattern characters.
	*/
	public String getLocalPatternChars() {
	return localPatternChars;
	}

	/**
	* Sets localized date-time pattern characters. For example: 'u', 't', etc.
	* @param newLocalPatternChars the new localized date-time
	* pattern characters.
	*/
	public void setLocalPatternChars(String newLocalPatternChars) {
	// Call toString() to throw an NPE in case the argument is null
	localPatternChars = newLocalPatternChars.toString();
	cachedHashCode = 0;
	}

	/**
	* Overrides Cloneable
	*/
	public Object clone()
	{
	try
	{
	DateFormatSymbols other = (DateFormatSymbols)super.clone();
	copyMembers(this, other);
	return other;
	} catch (CloneNotSupportedException e) {
	throw new InternalError(e);
	}
	}

	/**
	* Override hashCode.
	* Generates a hash code for the DateFormatSymbols object.
	*/
	@Override
	public int hashCode() {
	int hashCode = cachedHashCode;
	if (hashCode == 0) {
	hashCode = 5;
	hashCode = 11 * hashCode + Arrays.hashCode(eras);
	hashCode = 11 * hashCode + Arrays.hashCode(months);
	hashCode = 11 * hashCode + Arrays.hashCode(shortMonths);
	hashCode = 11 * hashCode + Arrays.hashCode(weekdays);
	hashCode = 11 * hashCode + Arrays.hashCode(shortWeekdays);
	hashCode = 11 * hashCode + Arrays.hashCode(ampms);
	hashCode = 11 * hashCode + Arrays.deepHashCode(getZoneStringsWrapper());
	hashCode = 11 * hashCode + Objects.hashCode(localPatternChars);
	cachedHashCode = hashCode;
	}

	return hashCode;
	}

	/**
	* Override equals
	*/
	public boolean equals(Object obj)
	{
	if (this == obj) return true;
	if (obj == null \|\| getClass() != obj.getClass()) return false;
	DateFormatSymbols that = (DateFormatSymbols) obj;
	return (Arrays.equals(eras, that.eras)
	&& Arrays.equals(months, that.months)
	&& Arrays.equals(shortMonths, that.shortMonths)
	&& Arrays.equals(weekdays, that.weekdays)
	&& Arrays.equals(shortWeekdays, that.shortWeekdays)
	&& Arrays.equals(ampms, that.ampms)
	&& Arrays.deepEquals(getZoneStringsWrapper(), that.getZoneStringsWrapper())
	&& ((localPatternChars != null
	&& localPatternChars.equals(that.localPatternChars))
	\|\| (localPatternChars == null
	&& that.localPatternChars == null)));
	}

	// =======================privates===============================

	/**
	* Useful constant for defining time zone offsets.
	*/
	static final int millisPerHour = 60601000;

	/**
	* Cache to hold DateFormatSymbols instances per Locale.
	*/
	private static final ConcurrentMap<Locale, SoftReference<DateFormatSymbols>> cachedInstances
	= new ConcurrentHashMap<>(3);

	private transient int lastZoneIndex = 0;

	/**
	* Cached hash code
	*/
	transient volatile int cachedHashCode = 0;

	/**
	* Initializes this DateFormatSymbols with the locale data. This method uses
	* a cached DateFormatSymbols instance for the given locale if available. If
	* there's no cached one, this method creates an uninitialized instance and
	* populates its fields from the resource bundle for the locale, and caches
	* the instance. Note: zoneStrings isn't initialized in this method.
	*/
	private void initializeData(Locale locale) {
	SoftReference<DateFormatSymbols> ref = cachedInstances.get(locale);
	DateFormatSymbols dfs;
	if (ref == null \|\| (dfs = ref.get()) == null) {
	if (ref != null) {
	// Remove the empty SoftReference
	cachedInstances.remove(locale, ref);
	}
	dfs = new DateFormatSymbols(false);

	// Initialize the fields from the ResourceBundle for locale.
	LocaleProviderAdapter adapter
	= LocaleProviderAdapter.getAdapter(DateFormatSymbolsProvider.class, locale);
	// Avoid any potential recursions
	if (!(adapter instanceof ResourceBundleBasedAdapter)) {
	adapter = LocaleProviderAdapter.getResourceBundleBased();
	}
	ResourceBundle resource
	= ((ResourceBundleBasedAdapter)adapter).getLocaleData().getDateFormatData(locale);

	dfs.locale = locale;
	// JRE and CLDR use different keys
	// JRE: Eras, short.Eras and narrow.Eras
	// CLDR: long.Eras, Eras and narrow.Eras
	if (resource.containsKey("Eras")) {
	dfs.eras = resource.getStringArray("Eras");
	} else if (resource.containsKey("long.Eras")) {
	dfs.eras = resource.getStringArray("long.Eras");
	} else if (resource.containsKey("short.Eras")) {
	dfs.eras = resource.getStringArray("short.Eras");
	}
	dfs.months = resource.getStringArray("MonthNames");
	dfs.shortMonths = resource.getStringArray("MonthAbbreviations");
	dfs.ampms = resource.getStringArray("AmPmMarkers");
	dfs.localPatternChars = resource.getString("DateTimePatternChars");

	// Day of week names are stored in a 1-based array.
	dfs.weekdays = toOneBasedArray(resource.getStringArray("DayNames"));
	dfs.shortWeekdays = toOneBasedArray(resource.getStringArray("DayAbbreviations"));

	// Put dfs in the cache
	ref = new SoftReference<>(dfs);
	SoftReference<DateFormatSymbols> x = cachedInstances.putIfAbsent(locale, ref);
	if (x != null) {
	DateFormatSymbols y = x.get();
	if (y == null) {
	// Replace the empty SoftReference with ref.
	cachedInstances.replace(locale, x, ref);
	} else {
	ref = x;
	dfs = y;
	}
	}
	// If the bundle's locale isn't the target locale, put another cache
	// entry for the bundle's locale.
	Locale bundleLocale = resource.getLocale();
	if (!bundleLocale.equals(locale)) {
	SoftReference<DateFormatSymbols> z
	= cachedInstances.putIfAbsent(bundleLocale, ref);
	if (z != null && z.get() == null) {
	cachedInstances.replace(bundleLocale, z, ref);
	}
	}
	}

	// Copy the field values from dfs to this instance.
	copyMembers(dfs, this);
	}

	private static String[] toOneBasedArray(String[] src) {
	int len = src.length;
	String[] dst = new String[len + 1];
	dst[0] = "";
	for (int i = 0; i < len; i++) {
	dst[i + 1] = src[i];
	}
	return dst;
	}

	/**
	* Package private: used by SimpleDateFormat
	* Gets the index for the given time zone ID to obtain the time zone
	* strings for formatting. The time zone ID is just for programmatic
	* lookup. NOT LOCALIZED!!!
	* @param ID the given time zone ID.
	* @return the index of the given time zone ID. Returns -1 if
	* the given time zone ID can't be located in the DateFormatSymbols object.
	* @see java.util.SimpleTimeZone
	*/
	final int getZoneIndex(String ID) {
	String[][] zoneStrings = getZoneStringsWrapper();

	/*
	* getZoneIndex has been re-written for performance reasons. instead of
	* traversing the zoneStrings array every time, we cache the last used zone
	* index
	*/
	if (lastZoneIndex < zoneStrings.length && ID.equals(zoneStrings[lastZoneIndex][0])) {
	return lastZoneIndex;
	}

	/* slow path, search entire list */
	for (int index = 0; index < zoneStrings.length; index++) {
	if (ID.equals(zoneStrings[index][0])) {
	lastZoneIndex = index;
	return index;
	}
	}

	return -1;
	}

	/**
	* Wrapper method to the getZoneStrings(), which is called from inside
	* the java.text package and not to mutate the returned arrays, so that
	* it does not need to create a defensive copy.
	*/
	final String[][] getZoneStringsWrapper() {
	if (isSubclassObject()) {
	return getZoneStrings();
	} else {
	return getZoneStringsImpl(false);
	}
	}

	private String[][] getZoneStringsImpl(boolean needsCopy) {
	if (zoneStrings == null) {
	zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
	}

	if (!needsCopy) {
	return zoneStrings;
	}

	int len = zoneStrings.length;
	String[][] aCopy = new String[len][];
	for (int i = 0; i < len; i++) {
	aCopy[i] = Arrays.copyOf(zoneStrings[i], zoneStrings[i].length);
	}
	return aCopy;
	}

	private boolean isSubclassObject() {
	return !getClass().getName().equals("java.text.DateFormatSymbols");
	}

	/**
	* Clones all the data members from the source DateFormatSymbols to
	* the target DateFormatSymbols.
	*
	* @param src the source DateFormatSymbols.
	* @param dst the target DateFormatSymbols.
	*/
	private void copyMembers(DateFormatSymbols src, DateFormatSymbols dst)
	{
	dst.locale = src.locale;
	dst.eras = Arrays.copyOf(src.eras, src.eras.length);
	dst.months = Arrays.copyOf(src.months, src.months.length);
	dst.shortMonths = Arrays.copyOf(src.shortMonths, src.shortMonths.length);
	dst.weekdays = Arrays.copyOf(src.weekdays, src.weekdays.length);
	dst.shortWeekdays = Arrays.copyOf(src.shortWeekdays, src.shortWeekdays.length);
	dst.ampms = Arrays.copyOf(src.ampms, src.ampms.length);
	if (src.zoneStrings != null) {
	dst.zoneStrings = src.getZoneStringsImpl(true);
	} else {
	dst.zoneStrings = null;
	}
	dst.localPatternChars = src.localPatternChars;
	dst.cachedHashCode = 0;
	}

	/**
	* Write out the default serializable data, after ensuring the
	* <code>zoneStrings</code> field is initialized in order to make
	* sure the backward compatibility.
	*
	* @since 1.6
	*/
	private void writeObject(ObjectOutputStream stream) throws IOException {
	if (zoneStrings == null) {
	zoneStrings = TimeZoneNameUtility.getZoneStrings(locale);
	}
	stream.defaultWriteObject();
	}
	}

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