Initial revision
From-SVN: r26263
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Tom Tromey
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301
libjava/java/text/DateFormat.java
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301
libjava/java/text/DateFormat.java
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.text;
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import java.util.*;
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/**
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* @author Per Bothner <bothner@cygnus.com>
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* @date October 25, 1998.
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*/
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/* Written using "Java Class Libraries", 2nd edition, plus online
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* API docs for JDK 1.2 beta from http://www.javasoft.com.
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* Status: Mostly complete; search for FIXME to see omissions.
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*/
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public abstract class DateFormat extends Format implements Cloneable
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{
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protected Calendar calendar;
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protected NumberFormat numberFormat;
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// (Values determined using a test program.)
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public final static int FULL = 0;
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public final static int LONG = 1;
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public final static int MEDIUM = 2;
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public final static int SHORT = 3;
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public final static int DEFAULT = MEDIUM;
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public final static int ERA_FIELD = 0;
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public final static int YEAR_FIELD = 1;
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public final static int MONTH_FIELD = 2;
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public final static int DATE_FIELD = 3;
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public final static int HOUR_OF_DAY1_FIELD = 4;
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public final static int HOUR_OF_DAY0_FIELD = 5;
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public final static int MINUTE_FIELD = 6;
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public final static int SECOND_FIELD = 7;
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public final static int MILLISECOND_FIELD = 8;
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public final static int DAY_OF_WEEK_FIELD = 9;
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public final static int DAY_OF_YEAR_FIELD = 10;
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public final static int DAY_OF_WEEK_IN_MONTH_FIELD = 11;
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public final static int WEEK_OF_YEAR_FIELD = 12;
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public final static int WEEK_OF_MONTH_FIELD = 13;
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public final static int AM_PM_FIELD = 14;
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public final static int HOUR1_FIELD = 15;
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public final static int HOUR0_FIELD = 16;
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public final static int TIMEZONE_FIELD = 17;
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protected DateFormat ()
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{
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}
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public boolean equals (Object obj)
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{
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if (! (obj instanceof DateFormat))
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return false;
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DateFormat d = (DateFormat) obj;
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return calendar.equals(d.calendar) && numberFormat.equals(d.numberFormat);
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}
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public final StringBuffer format (Object obj,
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StringBuffer buf, FieldPosition pos)
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{
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if (obj instanceof Number)
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return format (new Date(((Number) obj).longValue()), buf, pos);
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return format ((Date) obj, buf, pos);
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}
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public final String format (Date date)
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{
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StringBuffer sb = new StringBuffer ();
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format (date, sb, new FieldPosition (MONTH_FIELD));
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return sb.toString();
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}
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public abstract StringBuffer format (Date date,
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StringBuffer buf, FieldPosition pos);
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public static Locale[] getAvailableLocales ()
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{
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return null; // FIXME
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}
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public Calendar getCalendar ()
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{
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return calendar;
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}
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private static final DateFormat computeInstance (int style, Locale loc,
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boolean use_date,
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boolean use_time)
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{
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ResourceBundle res;
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try
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{
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res = ResourceBundle.getBundle("gnu.gcj.text.LocaleData", loc);
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}
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catch (MissingResourceException x)
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{
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res = null;
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}
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String pattern = null;
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if (use_date)
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{
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String name, def;
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switch (style)
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{
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case FULL:
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name = "fullDateFormat";
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def = "EEEE MMMM d, yyyy G";
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break;
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case LONG:
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name = "longDateFormat";
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def = "MMMM d, yyyy";
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break;
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case MEDIUM:
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name = "mediumDateFormat";
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def = "d-MMM-yy";
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break;
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case SHORT:
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name = "shortDateFormat";
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def = "M/d/yy";
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break;
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default:
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throw new IllegalArgumentException ();
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}
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try
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{
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pattern = res == null ? def : res.getString(name);
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}
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catch (MissingResourceException x)
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{
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pattern = def;
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}
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}
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if (use_time)
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{
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if (pattern == null)
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pattern = "";
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else
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pattern += " ";
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String name, def;
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switch (style)
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{
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case FULL:
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name = "fullTimeFormat";
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def = "h:mm:ss;S 'o''clock' a z";
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break;
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case LONG:
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name = "longTimeFormat";
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def = "h:mm:ss a z";
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break;
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case MEDIUM:
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name = "mediumTimeFormat";
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def = "h:mm:ss a";
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break;
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case SHORT:
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name = "shortTimeFormat";
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def = "h:mm a";
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break;
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default:
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throw new IllegalArgumentException ();
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}
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String s;
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try
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{
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s = res == null ? def : res.getString(name);
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}
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catch (MissingResourceException x)
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{
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s = def;
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}
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pattern += s;
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}
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return new SimpleDateFormat (pattern, loc);
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}
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public static final DateFormat getDateInstance ()
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{
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return getDateInstance (DEFAULT, Locale.getDefault());
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}
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public static final DateFormat getDateInstance (int style)
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{
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return getDateInstance (style, Locale.getDefault());
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}
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public static final DateFormat getDateInstance (int style, Locale loc)
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{
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return computeInstance (style, loc, true, false);
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}
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public static final DateFormat getDateTimeInstance ()
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{
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return getDateTimeInstance (DEFAULT, Locale.getDefault());
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}
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public static final DateFormat getDateTimeInstance (int style)
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{
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return getDateTimeInstance (style, Locale.getDefault());
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}
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public static final DateFormat getDateTimeInstance (int style, Locale loc)
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{
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return computeInstance (style, loc, true, true);
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}
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public static final DateFormat getInstance ()
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{
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// JCL book says SHORT.
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return getDateTimeInstance (SHORT, Locale.getDefault());
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}
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public NumberFormat getNumberFormat ()
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{
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return numberFormat;
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}
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public static final DateFormat getTimeInstance ()
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{
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return getTimeInstance (DEFAULT, Locale.getDefault());
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}
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public static final DateFormat getTimeInstance (int style)
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{
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return getTimeInstance (style, Locale.getDefault());
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}
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public static final DateFormat getTimeInstance (int style, Locale loc)
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{
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return computeInstance (style, loc, false, true);
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}
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public TimeZone getTimeZone ()
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{
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return calendar.getTimeZone();
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}
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public int hashCode ()
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{
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int hash = calendar.hashCode();
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if (numberFormat != null)
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hash ^= numberFormat.hashCode();
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return hash;
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}
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public boolean isLenient ()
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{
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return calendar.isLenient();
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}
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public Date parse (String source) throws ParseException
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{
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ParsePosition pos = new ParsePosition(0);
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Date result = parse (source, pos);
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if (result == null)
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{
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int index = pos.getErrorIndex();
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if (index < 0)
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index = pos.getIndex();
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throw new ParseException("invalid Date syntax", index);
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}
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return result;
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}
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public abstract Date parse (String source, ParsePosition pos);
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public Object parseObject (String source, ParsePosition pos)
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{
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return parse(source, pos);
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}
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public void setCalendar (Calendar calendar)
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{
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this.calendar = calendar;
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}
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public void setLenient (boolean lenient)
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{
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calendar.setLenient(lenient);
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}
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public void setNumberFormat (NumberFormat numberFormat)
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{
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this.numberFormat = numberFormat;
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}
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public void setTimeZone (TimeZone timeZone)
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{
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calendar.setTimeZone(timeZone);
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}
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}
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