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/*
 * Copyright (c) 1996, 2010, 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,
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 *
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/*
 * (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.util.Date;

/**
 * {@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 Date object or
 * as the milliseconds since January 1, 1970, 00:00:00 GMT.
 *
 * 

{@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. * *

{@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. * *

To format a date for the current Locale, use one of the * static factory methods: *

 *  myString = DateFormat.getDateInstance().format(myDate);
 * 
*

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. *

 *  DateFormat df = DateFormat.getDateInstance();
 *  for (int i = 0; i < myDate.length; ++i) {
 *    output.println(df.format(myDate[i]) + "; ");
 *  }
 * 
*

To format a date for a different Locale, specify it in the * call to {@link #getDateInstance(int, Locale) getDateInstance()}. *

 *  DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, Locale.FRANCE);
 * 
*

You can use a DateFormat to parse also. *

 *  myDate = df.parse(myString);
 * 
*

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: *

  • {@link #SHORT} is completely numeric, such as {@code 12.13.52} or {@code 3:30pm} *
  • {@link #MEDIUM} is longer, such as {@code Jan 12, 1952} *
  • {@link #LONG} is longer, such as {@code January 12, 1952} or {@code 3:30:32pm} *
  • {@link #FULL} is pretty completely specified, such as * {@code Tuesday, April 12, 1952 AD or 3:30:42pm PST}. *
* *

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. * *

You can also use forms of the parse and format methods with * {@link ParsePosition} and {@link FieldPosition} to * allow you to *

  • progressively parse through pieces of a string. *
  • align any particular field, or find out where it is for selection * on the screen. *
* *

Synchronization

* *

* 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. * * @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 */ public abstract class DateFormat extends Format { public static final String LONG= null; public static final String MEDIUM= null; public static final String SHORT= null; public static DateFormat getDateTimeInstance(String l, String m) { // TODO Auto-generated method stub return null; } public static DateFormat getDateTimeInstance() { // TODO Auto-generated method stub return null; } public Date parse(String source) throws ParseException { return null; } public final String format(Date date) { return ""; } }





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