--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/text/DateFormat.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,1062 @@
+/*
+ * Copyright (c) 1996, 2017, 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.InvalidObjectException;
+import java.text.spi.DateFormatProvider;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+import java.util.TimeZone;
+import java.util.spi.LocaleServiceProvider;
+import sun.util.locale.provider.LocaleProviderAdapter;
+import sun.util.locale.provider.LocaleServiceProviderPool;
+
+/**
+ * {@code DateFormat} is an abstract class for date/time formatting subclasses which
+ * formats and parses dates or time in a language-independent manner.
+ * The date/time formatting subclass, such as {@link SimpleDateFormat}, allows for
+ * formatting (i.e., date → text), parsing (text → date), and
+ * normalization. The date is represented as a <code>Date</code> object or
+ * as the milliseconds since January 1, 1970, 00:00:00 GMT.
+ *
+ * <p>{@code DateFormat} provides many class methods for obtaining default date/time
+ * formatters based on the default or a given locale and a number of formatting
+ * styles. The formatting styles include {@link #FULL}, {@link #LONG}, {@link #MEDIUM}, and {@link #SHORT}. More
+ * detail and examples of using these styles are provided in the method
+ * descriptions.
+ *
+ * <p>{@code DateFormat} helps you to format and parse dates for any locale.
+ * Your code can be completely independent of the locale conventions for
+ * months, days of the week, or even the calendar format: lunar vs. solar.
+ *
+ * <p>To format a date for the current Locale, use one of the
+ * static factory methods:
+ * <blockquote>
+ * <pre>{@code
+ * myString = DateFormat.getDateInstance().format(myDate);
+ * }</pre>
+ * </blockquote>
+ * <p>If you are formatting multiple dates, it is
+ * more efficient to get the format and use it multiple times so that
+ * the system doesn't have to fetch the information about the local
+ * language and country conventions multiple times.
+ * <blockquote>
+ * <pre>{@code
+ * DateFormat df = DateFormat.getDateInstance();
+ * for (int i = 0; i < myDate.length; ++i) {
+ * output.println(df.format(myDate[i]) + "; ");
+ * }
+ * }</pre>
+ * </blockquote>
+ * <p>To format a date for a different Locale, specify it in the
+ * call to {@link #getDateInstance(int, Locale) getDateInstance()}.
+ * <blockquote>
+ * <pre>{@code
+ * DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, Locale.FRANCE);
+ * }</pre>
+ * </blockquote>
+ * <p>You can use a DateFormat to parse also.
+ * <blockquote>
+ * <pre>{@code
+ * myDate = df.parse(myString);
+ * }</pre>
+ * </blockquote>
+ * <p>Use {@code getDateInstance} to get the normal date format for that country.
+ * There are other static factory methods available.
+ * Use {@code getTimeInstance} to get the time format for that country.
+ * Use {@code getDateTimeInstance} to get a date and time format. You can pass in
+ * different options to these factory methods to control the length of the
+ * result; from {@link #SHORT} to {@link #MEDIUM} to {@link #LONG} to {@link #FULL}. The exact result depends
+ * on the locale, but generally:
+ * <ul><li>{@link #SHORT} is completely numeric, such as {@code 12.13.52} or {@code 3:30pm}
+ * <li>{@link #MEDIUM} is longer, such as {@code Jan 12, 1952}
+ * <li>{@link #LONG} is longer, such as {@code January 12, 1952} or {@code 3:30:32pm}
+ * <li>{@link #FULL} is pretty completely specified, such as
+ * {@code Tuesday, April 12, 1952 AD or 3:30:42pm PST}.
+ * </ul>
+ *
+ * <p>You can also set the time zone on the format if you wish.
+ * If you want even more control over the format or parsing,
+ * (or want to give your users more control),
+ * you can try casting the {@code DateFormat} you get from the factory methods
+ * to a {@link SimpleDateFormat}. This will work for the majority
+ * of countries; just remember to put it in a {@code try} block in case you
+ * encounter an unusual one.
+ *
+ * <p>You can also use forms of the parse and format methods with
+ * {@link ParsePosition} and {@link FieldPosition} to
+ * allow you to
+ * <ul><li>progressively parse through pieces of a string.
+ * <li>align any particular field, or find out where it is for selection
+ * on the screen.
+ * </ul>
+ *
+ * <h3><a id="synchronization">Synchronization</a></h3>
+ *
+ * <p>
+ * Date formats are not synchronized.
+ * It is recommended to create separate format instances for each thread.
+ * If multiple threads access a format concurrently, it must be synchronized
+ * externally.
+ *
+ * @implSpec
+ * <ul><li>The {@link #format(Date, StringBuffer, FieldPosition)} and
+ * {@link #parse(String, ParsePosition)} methods may throw
+ * {@code NullPointerException}, if any of their parameter is {@code null}.
+ * The subclass may provide its own implementation and specification about
+ * {@code NullPointerException}.</li>
+ * <li>The {@link #setCalendar(Calendar)}, {@link
+ * #setNumberFormat(NumberFormat)} and {@link #setTimeZone(TimeZone)} methods
+ * do not throw {@code NullPointerException} when their parameter is
+ * {@code null}, but any subsequent operations on the same instance may throw
+ * {@code NullPointerException}.</li>
+ * <li>The {@link #getCalendar()}, {@link #getNumberFormat()} and
+ * {@link getTimeZone()} methods may return {@code null}, if the respective
+ * values of this instance is set to {@code null} through the corresponding
+ * setter methods. For Example: {@link #getTimeZone()} may return {@code null},
+ * if the {@code TimeZone} value of this instance is set as
+ * {@link #setTimeZone(java.util.TimeZone) setTimeZone(null)}.</li>
+ * </ul>
+ *
+ * @see Format
+ * @see NumberFormat
+ * @see SimpleDateFormat
+ * @see java.util.Calendar
+ * @see java.util.GregorianCalendar
+ * @see java.util.TimeZone
+ * @author Mark Davis, Chen-Lieh Huang, Alan Liu
+ * @since 1.1
+ */
+public abstract class DateFormat extends Format {
+
+ /**
+ * The {@link Calendar} instance used for calculating the date-time fields
+ * and the instant of time. This field is used for both formatting and
+ * parsing.
+ *
+ * <p>Subclasses should initialize this field to a {@link Calendar}
+ * appropriate for the {@link Locale} associated with this
+ * <code>DateFormat</code>.
+ * @serial
+ */
+ protected Calendar calendar;
+
+ /**
+ * The number formatter that <code>DateFormat</code> uses to format numbers
+ * in dates and times. Subclasses should initialize this to a number format
+ * appropriate for the locale associated with this <code>DateFormat</code>.
+ * @serial
+ */
+ protected NumberFormat numberFormat;
+
+ /**
+ * Useful constant for ERA field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int ERA_FIELD = 0;
+ /**
+ * Useful constant for YEAR field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int YEAR_FIELD = 1;
+ /**
+ * Useful constant for MONTH field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int MONTH_FIELD = 2;
+ /**
+ * Useful constant for DATE field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int DATE_FIELD = 3;
+ /**
+ * Useful constant for one-based HOUR_OF_DAY field alignment.
+ * Used in FieldPosition of date/time formatting.
+ * HOUR_OF_DAY1_FIELD is used for the one-based 24-hour clock.
+ * For example, 23:59 + 01:00 results in 24:59.
+ */
+ public static final int HOUR_OF_DAY1_FIELD = 4;
+ /**
+ * Useful constant for zero-based HOUR_OF_DAY field alignment.
+ * Used in FieldPosition of date/time formatting.
+ * HOUR_OF_DAY0_FIELD is used for the zero-based 24-hour clock.
+ * For example, 23:59 + 01:00 results in 00:59.
+ */
+ public static final int HOUR_OF_DAY0_FIELD = 5;
+ /**
+ * Useful constant for MINUTE field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int MINUTE_FIELD = 6;
+ /**
+ * Useful constant for SECOND field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int SECOND_FIELD = 7;
+ /**
+ * Useful constant for MILLISECOND field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int MILLISECOND_FIELD = 8;
+ /**
+ * Useful constant for DAY_OF_WEEK field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int DAY_OF_WEEK_FIELD = 9;
+ /**
+ * Useful constant for DAY_OF_YEAR field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int DAY_OF_YEAR_FIELD = 10;
+ /**
+ * Useful constant for DAY_OF_WEEK_IN_MONTH field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int DAY_OF_WEEK_IN_MONTH_FIELD = 11;
+ /**
+ * Useful constant for WEEK_OF_YEAR field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int WEEK_OF_YEAR_FIELD = 12;
+ /**
+ * Useful constant for WEEK_OF_MONTH field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int WEEK_OF_MONTH_FIELD = 13;
+ /**
+ * Useful constant for AM_PM field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int AM_PM_FIELD = 14;
+ /**
+ * Useful constant for one-based HOUR field alignment.
+ * Used in FieldPosition of date/time formatting.
+ * HOUR1_FIELD is used for the one-based 12-hour clock.
+ * For example, 11:30 PM + 1 hour results in 12:30 AM.
+ */
+ public static final int HOUR1_FIELD = 15;
+ /**
+ * Useful constant for zero-based HOUR field alignment.
+ * Used in FieldPosition of date/time formatting.
+ * HOUR0_FIELD is used for the zero-based 12-hour clock.
+ * For example, 11:30 PM + 1 hour results in 00:30 AM.
+ */
+ public static final int HOUR0_FIELD = 16;
+ /**
+ * Useful constant for TIMEZONE field alignment.
+ * Used in FieldPosition of date/time formatting.
+ */
+ public static final int TIMEZONE_FIELD = 17;
+
+ // Proclaim serial compatibility with 1.1 FCS
+ private static final long serialVersionUID = 7218322306649953788L;
+
+ /**
+ * Overrides Format.
+ * Formats a time object into a time string. Examples of time objects
+ * are a time value expressed in milliseconds and a Date object.
+ * @param obj must be a Number or a Date.
+ * @param toAppendTo the string buffer for the returning time string.
+ * @return the string buffer passed in as toAppendTo, with formatted text appended.
+ * @param fieldPosition keeps track of the position of the field
+ * within the returned string.
+ * On input: an alignment field,
+ * if desired. On output: the offsets of the alignment field. For
+ * example, given a time text "1996.07.10 AD at 15:08:56 PDT",
+ * if the given fieldPosition is DateFormat.YEAR_FIELD, the
+ * begin index and end index of fieldPosition will be set to
+ * 0 and 4, respectively.
+ * Notice that if the same time field appears
+ * more than once in a pattern, the fieldPosition will be set for the first
+ * occurrence of that time field. For instance, formatting a Date to
+ * the time string "1 PM PDT (Pacific Daylight Time)" using the pattern
+ * "h a z (zzzz)" and the alignment field DateFormat.TIMEZONE_FIELD,
+ * the begin index and end index of fieldPosition will be set to
+ * 5 and 8, respectively, for the first occurrence of the timezone
+ * pattern character 'z'.
+ * @exception IllegalArgumentException if the {@code Format} cannot format
+ * the given {@code obj}.
+ * @see java.text.Format
+ */
+ public final StringBuffer format(Object obj, StringBuffer toAppendTo,
+ FieldPosition fieldPosition)
+ {
+ if (obj instanceof Date)
+ return format( (Date)obj, toAppendTo, fieldPosition );
+ else if (obj instanceof Number)
+ return format( new Date(((Number)obj).longValue()),
+ toAppendTo, fieldPosition );
+ else
+ throw new IllegalArgumentException("Cannot format given Object as a Date");
+ }
+
+ /**
+ * Formats a Date into a date/time string.
+ * @param date a Date to be formatted into a date/time string.
+ * @param toAppendTo the string buffer for the returning date/time string.
+ * @param fieldPosition keeps track of the position of the field
+ * within the returned string.
+ * On input: an alignment field,
+ * if desired. On output: the offsets of the alignment field. For
+ * example, given a time text "1996.07.10 AD at 15:08:56 PDT",
+ * if the given fieldPosition is DateFormat.YEAR_FIELD, the
+ * begin index and end index of fieldPosition will be set to
+ * 0 and 4, respectively.
+ * Notice that if the same time field appears
+ * more than once in a pattern, the fieldPosition will be set for the first
+ * occurrence of that time field. For instance, formatting a Date to
+ * the time string "1 PM PDT (Pacific Daylight Time)" using the pattern
+ * "h a z (zzzz)" and the alignment field DateFormat.TIMEZONE_FIELD,
+ * the begin index and end index of fieldPosition will be set to
+ * 5 and 8, respectively, for the first occurrence of the timezone
+ * pattern character 'z'.
+ * @return the string buffer passed in as toAppendTo, with formatted text appended.
+ */
+ public abstract StringBuffer format(Date date, StringBuffer toAppendTo,
+ FieldPosition fieldPosition);
+
+ /**
+ * Formats a Date into a date/time string.
+ * @param date the time value to be formatted into a time string.
+ * @return the formatted time string.
+ */
+ public final String format(Date date)
+ {
+ return format(date, new StringBuffer(),
+ DontCareFieldPosition.INSTANCE).toString();
+ }
+
+ /**
+ * Parses text from the beginning of the given string to produce a date.
+ * The method may not use the entire text of the given string.
+ * <p>
+ * See the {@link #parse(String, ParsePosition)} method for more information
+ * on date parsing.
+ *
+ * @param source A <code>String</code> whose beginning should be parsed.
+ * @return A <code>Date</code> parsed from the string.
+ * @exception ParseException if the beginning of the specified string
+ * cannot be parsed.
+ */
+ public Date parse(String source) throws ParseException
+ {
+ ParsePosition pos = new ParsePosition(0);
+ Date result = parse(source, pos);
+ if (pos.index == 0)
+ throw new ParseException("Unparseable date: \"" + source + "\"" ,
+ pos.errorIndex);
+ return result;
+ }
+
+ /**
+ * Parse a date/time string according to the given parse position. For
+ * example, a time text {@code "07/10/96 4:5 PM, PDT"} will be parsed into a {@code Date}
+ * that is equivalent to {@code Date(837039900000L)}.
+ *
+ * <p> By default, parsing is lenient: If the input is not in the form used
+ * by this object's format method but can still be parsed as a date, then
+ * the parse succeeds. Clients may insist on strict adherence to the
+ * format by calling {@link #setLenient(boolean) setLenient(false)}.
+ *
+ * <p>This parsing operation uses the {@link #calendar} to produce
+ * a {@code Date}. As a result, the {@code calendar}'s date-time
+ * fields and the {@code TimeZone} value may have been
+ * overwritten, depending on subclass implementations. Any {@code
+ * TimeZone} value that has previously been set by a call to
+ * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
+ * to be restored for further operations.
+ *
+ * @param source The date/time string to be parsed
+ *
+ * @param pos On input, the position at which to start parsing; on
+ * output, the position at which parsing terminated, or the
+ * start position if the parse failed.
+ *
+ * @return A {@code Date}, or {@code null} if the input could not be parsed
+ */
+ public abstract Date parse(String source, ParsePosition pos);
+
+ /**
+ * Parses text from a string to produce a <code>Date</code>.
+ * <p>
+ * The method attempts to parse text starting at the index given by
+ * <code>pos</code>.
+ * If parsing succeeds, then the index of <code>pos</code> is updated
+ * to the index after the last character used (parsing does not necessarily
+ * use all characters up to the end of the string), and the parsed
+ * date is returned. The updated <code>pos</code> can be used to
+ * indicate the starting point for the next call to this method.
+ * If an error occurs, then the index of <code>pos</code> is not
+ * changed, the error index of <code>pos</code> is set to the index of
+ * the character where the error occurred, and null is returned.
+ * <p>
+ * See the {@link #parse(String, ParsePosition)} method for more information
+ * on date parsing.
+ *
+ * @param source A <code>String</code>, part of which should be parsed.
+ * @param pos A <code>ParsePosition</code> object with index and error
+ * index information as described above.
+ * @return A <code>Date</code> parsed from the string. In case of
+ * error, returns null.
+ * @throws NullPointerException if {@code source} or {@code pos} is null.
+ */
+ public Object parseObject(String source, ParsePosition pos) {
+ return parse(source, pos);
+ }
+
+ /**
+ * Constant for full style pattern.
+ */
+ public static final int FULL = 0;
+ /**
+ * Constant for long style pattern.
+ */
+ public static final int LONG = 1;
+ /**
+ * Constant for medium style pattern.
+ */
+ public static final int MEDIUM = 2;
+ /**
+ * Constant for short style pattern.
+ */
+ public static final int SHORT = 3;
+ /**
+ * Constant for default style pattern. Its value is MEDIUM.
+ */
+ public static final int DEFAULT = MEDIUM;
+
+ /**
+ * Gets the time formatter with the default formatting style
+ * for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getTimeInstance(int, Locale) getTimeInstance(DEFAULT,
+ * Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @return a time formatter.
+ */
+ public static final DateFormat getTimeInstance()
+ {
+ return get(DEFAULT, 0, 1, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the time formatter with the given formatting style
+ * for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getTimeInstance(int, Locale) getTimeInstance(style,
+ * Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @param style the given formatting style. For example,
+ * SHORT for "h:mm a" in the US locale.
+ * @return a time formatter.
+ */
+ public static final DateFormat getTimeInstance(int style)
+ {
+ return get(style, 0, 1, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the time formatter with the given formatting style
+ * for the given locale.
+ * @param style the given formatting style. For example,
+ * SHORT for "h:mm a" in the US locale.
+ * @param aLocale the given locale.
+ * @return a time formatter.
+ */
+ public static final DateFormat getTimeInstance(int style,
+ Locale aLocale)
+ {
+ return get(style, 0, 1, aLocale);
+ }
+
+ /**
+ * Gets the date formatter with the default formatting style
+ * for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getDateInstance(int, Locale) getDateInstance(DEFAULT,
+ * Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @return a date formatter.
+ */
+ public static final DateFormat getDateInstance()
+ {
+ return get(0, DEFAULT, 2, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the date formatter with the given formatting style
+ * for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getDateInstance(int, Locale) getDateInstance(style,
+ * Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @param style the given formatting style. For example,
+ * SHORT for "M/d/yy" in the US locale.
+ * @return a date formatter.
+ */
+ public static final DateFormat getDateInstance(int style)
+ {
+ return get(0, style, 2, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the date formatter with the given formatting style
+ * for the given locale.
+ * @param style the given formatting style. For example,
+ * SHORT for "M/d/yy" in the US locale.
+ * @param aLocale the given locale.
+ * @return a date formatter.
+ */
+ public static final DateFormat getDateInstance(int style,
+ Locale aLocale)
+ {
+ return get(0, style, 2, aLocale);
+ }
+
+ /**
+ * Gets the date/time formatter with the default formatting style
+ * for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getDateTimeInstance(int, int, Locale) getDateTimeInstance(DEFAULT,
+ * DEFAULT, Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @return a date/time formatter.
+ */
+ public static final DateFormat getDateTimeInstance()
+ {
+ return get(DEFAULT, DEFAULT, 3, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the date/time formatter with the given date and time
+ * formatting styles for the default {@link java.util.Locale.Category#FORMAT FORMAT} locale.
+ * <p>This is equivalent to calling
+ * {@link #getDateTimeInstance(int, int, Locale) getDateTimeInstance(dateStyle,
+ * timeStyle, Locale.getDefault(Locale.Category.FORMAT))}.
+ * @see java.util.Locale#getDefault(java.util.Locale.Category)
+ * @see java.util.Locale.Category#FORMAT
+ * @param dateStyle the given date formatting style. For example,
+ * SHORT for "M/d/yy" in the US locale.
+ * @param timeStyle the given time formatting style. For example,
+ * SHORT for "h:mm a" in the US locale.
+ * @return a date/time formatter.
+ */
+ public static final DateFormat getDateTimeInstance(int dateStyle,
+ int timeStyle)
+ {
+ return get(timeStyle, dateStyle, 3, Locale.getDefault(Locale.Category.FORMAT));
+ }
+
+ /**
+ * Gets the date/time formatter with the given formatting styles
+ * for the given locale.
+ * @param dateStyle the given date formatting style.
+ * @param timeStyle the given time formatting style.
+ * @param aLocale the given locale.
+ * @return a date/time formatter.
+ */
+ public static final DateFormat
+ getDateTimeInstance(int dateStyle, int timeStyle, Locale aLocale)
+ {
+ return get(timeStyle, dateStyle, 3, aLocale);
+ }
+
+ /**
+ * Get a default date/time formatter that uses the SHORT style for both the
+ * date and the time.
+ *
+ * @return a date/time formatter
+ */
+ public static final DateFormat getInstance() {
+ return getDateTimeInstance(SHORT, SHORT);
+ }
+
+ /**
+ * Returns an array of all locales for which the
+ * <code>get*Instance</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.DateFormatProvider DateFormatProvider} 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>DateFormat</code> instances are available.
+ */
+ public static Locale[] getAvailableLocales()
+ {
+ LocaleServiceProviderPool pool =
+ LocaleServiceProviderPool.getPool(DateFormatProvider.class);
+ return pool.getAvailableLocales();
+ }
+
+ /**
+ * Set the calendar to be used by this date format. Initially, the default
+ * calendar for the specified or default locale is used.
+ *
+ * <p>Any {@link java.util.TimeZone TimeZone} and {@linkplain
+ * #isLenient() leniency} values that have previously been set are
+ * overwritten by {@code newCalendar}'s values.
+ *
+ * @param newCalendar the new {@code Calendar} to be used by the date format
+ */
+ public void setCalendar(Calendar newCalendar)
+ {
+ this.calendar = newCalendar;
+ }
+
+ /**
+ * Gets the calendar associated with this date/time formatter.
+ *
+ * @return the calendar associated with this date/time formatter.
+ */
+ public Calendar getCalendar()
+ {
+ return calendar;
+ }
+
+ /**
+ * Allows you to set the number formatter.
+ * @param newNumberFormat the given new NumberFormat.
+ */
+ public void setNumberFormat(NumberFormat newNumberFormat)
+ {
+ this.numberFormat = newNumberFormat;
+ }
+
+ /**
+ * Gets the number formatter which this date/time formatter uses to
+ * format and parse a time.
+ * @return the number formatter which this date/time formatter uses.
+ */
+ public NumberFormat getNumberFormat()
+ {
+ return numberFormat;
+ }
+
+ /**
+ * Sets the time zone for the calendar of this {@code DateFormat} object.
+ * This method is equivalent to the following call.
+ * <blockquote><pre>{@code
+ * getCalendar().setTimeZone(zone)
+ * }</pre></blockquote>
+ *
+ * <p>The {@code TimeZone} set by this method is overwritten by a
+ * {@link #setCalendar(java.util.Calendar) setCalendar} call.
+ *
+ * <p>The {@code TimeZone} set by this method may be overwritten as
+ * a result of a call to the parse method.
+ *
+ * @param zone the given new time zone.
+ */
+ public void setTimeZone(TimeZone zone)
+ {
+ calendar.setTimeZone(zone);
+ }
+
+ /**
+ * Gets the time zone.
+ * This method is equivalent to the following call.
+ * <blockquote><pre>{@code
+ * getCalendar().getTimeZone()
+ * }</pre></blockquote>
+ *
+ * @return the time zone associated with the calendar of DateFormat.
+ */
+ public TimeZone getTimeZone()
+ {
+ return calendar.getTimeZone();
+ }
+
+ /**
+ * Specify whether or not date/time parsing is to be lenient. With
+ * lenient parsing, the parser may use heuristics to interpret inputs that
+ * do not precisely match this object's format. With strict parsing,
+ * inputs must match this object's format.
+ *
+ * <p>This method is equivalent to the following call.
+ * <blockquote><pre>{@code
+ * getCalendar().setLenient(lenient)
+ * }</pre></blockquote>
+ *
+ * <p>This leniency value is overwritten by a call to {@link
+ * #setCalendar(java.util.Calendar) setCalendar()}.
+ *
+ * @param lenient when {@code true}, parsing is lenient
+ * @see java.util.Calendar#setLenient(boolean)
+ */
+ public void setLenient(boolean lenient)
+ {
+ calendar.setLenient(lenient);
+ }
+
+ /**
+ * Tell whether date/time parsing is to be lenient.
+ * This method is equivalent to the following call.
+ * <blockquote><pre>{@code
+ * getCalendar().isLenient()
+ * }</pre></blockquote>
+ *
+ * @return {@code true} if the {@link #calendar} is lenient;
+ * {@code false} otherwise.
+ * @see java.util.Calendar#isLenient()
+ */
+ public boolean isLenient()
+ {
+ return calendar.isLenient();
+ }
+
+ /**
+ * Overrides hashCode
+ */
+ public int hashCode() {
+ return numberFormat.hashCode();
+ // just enough fields for a reasonable distribution
+ }
+
+ /**
+ * Overrides equals
+ */
+ public boolean equals(Object obj) {
+ if (this == obj) return true;
+ if (obj == null || getClass() != obj.getClass()) return false;
+ DateFormat other = (DateFormat) obj;
+ return (// calendar.equivalentTo(other.calendar) // THIS API DOESN'T EXIST YET!
+ calendar.getFirstDayOfWeek() == other.calendar.getFirstDayOfWeek() &&
+ calendar.getMinimalDaysInFirstWeek() == other.calendar.getMinimalDaysInFirstWeek() &&
+ calendar.isLenient() == other.calendar.isLenient() &&
+ calendar.getTimeZone().equals(other.calendar.getTimeZone()) &&
+ numberFormat.equals(other.numberFormat));
+ }
+
+ /**
+ * Overrides Cloneable
+ */
+ public Object clone()
+ {
+ DateFormat other = (DateFormat) super.clone();
+ other.calendar = (Calendar) calendar.clone();
+ other.numberFormat = (NumberFormat) numberFormat.clone();
+ return other;
+ }
+
+ /**
+ * Creates a DateFormat with the given time and/or date style in the given
+ * locale.
+ * @param timeStyle a value from 0 to 3 indicating the time format,
+ * ignored if flags is 2
+ * @param dateStyle a value from 0 to 3 indicating the time format,
+ * ignored if flags is 1
+ * @param flags either 1 for a time format, 2 for a date format,
+ * or 3 for a date/time format
+ * @param loc the locale for the format
+ */
+ private static DateFormat get(int timeStyle, int dateStyle,
+ int flags, Locale loc) {
+ if ((flags & 1) != 0) {
+ if (timeStyle < 0 || timeStyle > 3) {
+ throw new IllegalArgumentException("Illegal time style " + timeStyle);
+ }
+ } else {
+ timeStyle = -1;
+ }
+ if ((flags & 2) != 0) {
+ if (dateStyle < 0 || dateStyle > 3) {
+ throw new IllegalArgumentException("Illegal date style " + dateStyle);
+ }
+ } else {
+ dateStyle = -1;
+ }
+
+ LocaleProviderAdapter adapter = LocaleProviderAdapter.getAdapter(DateFormatProvider.class, loc);
+ DateFormat dateFormat = get(adapter, timeStyle, dateStyle, loc);
+ if (dateFormat == null) {
+ dateFormat = get(LocaleProviderAdapter.forJRE(), timeStyle, dateStyle, loc);
+ }
+ return dateFormat;
+ }
+
+ private static DateFormat get(LocaleProviderAdapter adapter, int timeStyle, int dateStyle, Locale loc) {
+ DateFormatProvider provider = adapter.getDateFormatProvider();
+ DateFormat dateFormat;
+ if (timeStyle == -1) {
+ dateFormat = provider.getDateInstance(dateStyle, loc);
+ } else {
+ if (dateStyle == -1) {
+ dateFormat = provider.getTimeInstance(timeStyle, loc);
+ } else {
+ dateFormat = provider.getDateTimeInstance(dateStyle, timeStyle, loc);
+ }
+ }
+ return dateFormat;
+ }
+
+ /**
+ * Create a new date format.
+ */
+ protected DateFormat() {}
+
+ /**
+ * Defines constants that are used as attribute keys in the
+ * <code>AttributedCharacterIterator</code> returned
+ * from <code>DateFormat.formatToCharacterIterator</code> and as
+ * field identifiers in <code>FieldPosition</code>.
+ * <p>
+ * The class also provides two methods to map
+ * between its constants and the corresponding Calendar constants.
+ *
+ * @since 1.4
+ * @see java.util.Calendar
+ */
+ public static class Field extends Format.Field {
+
+ // Proclaim serial compatibility with 1.4 FCS
+ private static final long serialVersionUID = 7441350119349544720L;
+
+ // table of all instances in this class, used by readResolve
+ private static final Map<String, Field> instanceMap = new HashMap<>(18);
+ // Maps from Calendar constant (such as Calendar.ERA) to Field
+ // constant (such as Field.ERA).
+ private static final Field[] calendarToFieldMapping =
+ new Field[Calendar.FIELD_COUNT];
+
+ /** Calendar field. */
+ private int calendarField;
+
+ /**
+ * Returns the <code>Field</code> constant that corresponds to
+ * the <code>Calendar</code> constant <code>calendarField</code>.
+ * If there is no direct mapping between the <code>Calendar</code>
+ * constant and a <code>Field</code>, null is returned.
+ *
+ * @throws IllegalArgumentException if <code>calendarField</code> is
+ * not the value of a <code>Calendar</code> field constant.
+ * @param calendarField Calendar field constant
+ * @return Field instance representing calendarField.
+ * @see java.util.Calendar
+ */
+ public static Field ofCalendarField(int calendarField) {
+ if (calendarField < 0 || calendarField >=
+ calendarToFieldMapping.length) {
+ throw new IllegalArgumentException("Unknown Calendar constant "
+ + calendarField);
+ }
+ return calendarToFieldMapping[calendarField];
+ }
+
+ /**
+ * Creates a <code>Field</code>.
+ *
+ * @param name the name of the <code>Field</code>
+ * @param calendarField the <code>Calendar</code> constant this
+ * <code>Field</code> corresponds to; any value, even one
+ * outside the range of legal <code>Calendar</code> values may
+ * be used, but <code>-1</code> should be used for values
+ * that don't correspond to legal <code>Calendar</code> values
+ */
+ protected Field(String name, int calendarField) {
+ super(name);
+ this.calendarField = calendarField;
+ if (this.getClass() == DateFormat.Field.class) {
+ instanceMap.put(name, this);
+ if (calendarField >= 0) {
+ // assert(calendarField < Calendar.FIELD_COUNT);
+ calendarToFieldMapping[calendarField] = this;
+ }
+ }
+ }
+
+ /**
+ * Returns the <code>Calendar</code> field associated with this
+ * attribute. For example, if this represents the hours field of
+ * a <code>Calendar</code>, this would return
+ * <code>Calendar.HOUR</code>. If there is no corresponding
+ * <code>Calendar</code> constant, this will return -1.
+ *
+ * @return Calendar constant for this field
+ * @see java.util.Calendar
+ */
+ public int getCalendarField() {
+ return calendarField;
+ }
+
+ /**
+ * Resolves instances being deserialized to the predefined constants.
+ *
+ * @throws InvalidObjectException if the constant could not be
+ * resolved.
+ * @return resolved DateFormat.Field constant
+ */
+ @Override
+ protected Object readResolve() throws InvalidObjectException {
+ if (this.getClass() != DateFormat.Field.class) {
+ throw new InvalidObjectException("subclass didn't correctly implement readResolve");
+ }
+
+ Object instance = instanceMap.get(getName());
+ if (instance != null) {
+ return instance;
+ } else {
+ throw new InvalidObjectException("unknown attribute name");
+ }
+ }
+
+ //
+ // The constants
+ //
+
+ /**
+ * Constant identifying the era field.
+ */
+ public static final Field ERA = new Field("era", Calendar.ERA);
+
+ /**
+ * Constant identifying the year field.
+ */
+ public static final Field YEAR = new Field("year", Calendar.YEAR);
+
+ /**
+ * Constant identifying the month field.
+ */
+ public static final Field MONTH = new Field("month", Calendar.MONTH);
+
+ /**
+ * Constant identifying the day of month field.
+ */
+ public static final Field DAY_OF_MONTH = new
+ Field("day of month", Calendar.DAY_OF_MONTH);
+
+ /**
+ * Constant identifying the hour of day field, where the legal values
+ * are 1 to 24.
+ */
+ public static final Field HOUR_OF_DAY1 = new Field("hour of day 1",-1);
+
+ /**
+ * Constant identifying the hour of day field, where the legal values
+ * are 0 to 23.
+ */
+ public static final Field HOUR_OF_DAY0 = new
+ Field("hour of day", Calendar.HOUR_OF_DAY);
+
+ /**
+ * Constant identifying the minute field.
+ */
+ public static final Field MINUTE =new Field("minute", Calendar.MINUTE);
+
+ /**
+ * Constant identifying the second field.
+ */
+ public static final Field SECOND =new Field("second", Calendar.SECOND);
+
+ /**
+ * Constant identifying the millisecond field.
+ */
+ public static final Field MILLISECOND = new
+ Field("millisecond", Calendar.MILLISECOND);
+
+ /**
+ * Constant identifying the day of week field.
+ */
+ public static final Field DAY_OF_WEEK = new
+ Field("day of week", Calendar.DAY_OF_WEEK);
+
+ /**
+ * Constant identifying the day of year field.
+ */
+ public static final Field DAY_OF_YEAR = new
+ Field("day of year", Calendar.DAY_OF_YEAR);
+
+ /**
+ * Constant identifying the day of week field.
+ */
+ public static final Field DAY_OF_WEEK_IN_MONTH =
+ new Field("day of week in month",
+ Calendar.DAY_OF_WEEK_IN_MONTH);
+
+ /**
+ * Constant identifying the week of year field.
+ */
+ public static final Field WEEK_OF_YEAR = new
+ Field("week of year", Calendar.WEEK_OF_YEAR);
+
+ /**
+ * Constant identifying the week of month field.
+ */
+ public static final Field WEEK_OF_MONTH = new
+ Field("week of month", Calendar.WEEK_OF_MONTH);
+
+ /**
+ * Constant identifying the time of day indicator
+ * (e.g. "a.m." or "p.m.") field.
+ */
+ public static final Field AM_PM = new
+ Field("am pm", Calendar.AM_PM);
+
+ /**
+ * Constant identifying the hour field, where the legal values are
+ * 1 to 12.
+ */
+ public static final Field HOUR1 = new Field("hour 1", -1);
+
+ /**
+ * Constant identifying the hour field, where the legal values are
+ * 0 to 11.
+ */
+ public static final Field HOUR0 = new
+ Field("hour", Calendar.HOUR);
+
+ /**
+ * Constant identifying the time zone field.
+ */
+ public static final Field TIME_ZONE = new Field("time zone", -1);
+ }
+}