/*

 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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package java.util;

import java.io.BufferedWriter;

import java.io.Closeable;

import java.io.IOException;

import java.io.File;

import java.io.FileOutputStream;

import java.io.FileNotFoundException;

import java.io.Flushable;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.io.PrintStream;

import java.io.UnsupportedEncodingException;

import java.math.BigDecimal;

import java.math.BigInteger;

import java.math.MathContext;

import java.math.RoundingMode;

import java.nio.charset.Charset;

import java.nio.charset.IllegalCharsetNameException;

import java.nio.charset.UnsupportedCharsetException;

import java.text.DateFormatSymbols;

import java.text.DecimalFormat;

import java.text.DecimalFormatSymbols;

import java.text.NumberFormat;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.time.DateTimeException;

import java.time.Instant;

import java.time.ZoneId;

import java.time.ZoneOffset;

import java.time.temporal.ChronoField;

import java.time.temporal.TemporalAccessor;

import java.time.temporal.TemporalQueries;

import sun.misc.DoubleConsts;

import sun.misc.FormattedFloatingDecimal;

/**

 * An interpreter for printf-style format strings.  This class provides support

 * for layout justification and alignment, common formats for numeric, string,

 * and date/time data, and locale-specific output.  Common Java types such as

 * {@code byte}, {@link java.math.BigDecimal BigDecimal}, and {@link Calendar}

 * are supported.  Limited formatting customization for arbitrary user types is

 * provided through the {@link Formattable} interface.

 *

 * <p> Formatters are not necessarily safe for multithreaded access.  Thread

 * safety is optional and is the responsibility of users of methods in this

 * class.

 *

 * <p> Formatted printing for the Java language is heavily inspired by C's

 * {@code printf}.  Although the format strings are similar to C, some

 * customizations have been made to accommodate the Java language and exploit

 * some of its features.  Also, Java formatting is more strict than C's; for

 * example, if a conversion is incompatible with a flag, an exception will be

 * thrown.  In C inapplicable flags are silently ignored.  The format strings

 * are thus intended to be recognizable to C programmers but not necessarily

 * completely compatible with those in C.

 *

 * <p> Examples of expected usage:

 *

 * <blockquote><pre>

 *   StringBuilder sb = new StringBuilder();

 *   // Send all output to the Appendable object sb

 *   Formatter formatter = new Formatter(sb, Locale.US);

 *

 *   // Explicit argument indices may be used to re-order output.

 *   formatter.format("%4$2s %3$2s %2$2s %1$2s", "a", "b", "c", "d")

 *   // -> " d  c  b  a"

 *

 *   // Optional locale as the first argument can be used to get

 *   // locale-specific formatting of numbers.  The precision and width can be

 *   // given to round and align the value.

 *   formatter.format(Locale.FRANCE, "e = %+10.4f", Math.E);

 *   // -> "e =    +2,7183"

 *

 *   // The '(' numeric flag may be used to format negative numbers with

 *   // parentheses rather than a minus sign.  Group separators are

 *   // automatically inserted.

 *   formatter.format("Amount gained or lost since last statement: $ %(,.2f",

 *                    balanceDelta);

 *   // -> "Amount gained or lost since last statement: $ (6,217.58)"

 * </pre></blockquote>

 *

 * <p> Convenience methods for common formatting requests exist as illustrated

 * by the following invocations:

 *

 * <blockquote><pre>

 *   // Writes a formatted string to System.out.

 *   System.out.format("Local time: %tT", Calendar.getInstance());

 *   // -> "Local time: 13:34:18"

 *

 *   // Writes formatted output to System.err.

 *   System.err.printf("Unable to open file '%1$s': %2$s",

 *                     fileName, exception.getMessage());

 *   // -> "Unable to open file 'food': No such file or directory"

 * </pre></blockquote>

 *

 * <p> Like C's {@code sprintf(3)}, Strings may be formatted using the static

 * method {@link String#format(String,Object...) String.format}:

 *

 * <blockquote><pre>

 *   // Format a string containing a date.

 *   import java.util.Calendar;

 *   import java.util.GregorianCalendar;

 *   import static java.util.Calendar.*;

 *

 *   Calendar c = new GregorianCalendar(1995, MAY, 23);

 *   String s = String.format("Duke's Birthday: %1$tb %1$te, %1$tY", c);

 *   // -> s == "Duke's Birthday: May 23, 1995"

 * </pre></blockquote>

 *

 * <h3><a name="org">Organization</a></h3>

 *

 * <p> This specification is divided into two sections.  The first section, <a

 * href="#summary">Summary</a>, covers the basic formatting concepts.  This

 * section is intended for users who want to get started quickly and are

 * familiar with formatted printing in other programming languages.  The second

 * section, <a href="#detail">Details</a>, covers the specific implementation

 * details.  It is intended for users who want more precise specification of

 * formatting behavior.

 *

 * <h3><a name="summary">Summary</a></h3>

 *

 * <p> This section is intended to provide a brief overview of formatting

 * concepts.  For precise behavioral details, refer to the <a

 * href="#detail">Details</a> section.

 *

 * <h4><a name="syntax">Format String Syntax</a></h4>

 *

 * <p> Every method which produces formatted output requires a <i>format

 * string</i> and an <i>argument list</i>.  The format string is a {@link

 * String} which may contain fixed text and one or more embedded <i>format

 * specifiers</i>.  Consider the following example:

 *

 * <blockquote><pre>

 *   Calendar c = ...;

 *   String s = String.format("Duke's Birthday: %1$tm %1$te,%1$tY", c);

 * </pre></blockquote>

 *

 * This format string is the first argument to the {@code format} method.  It

 * contains three format specifiers "{@code %1$tm}", "{@code %1$te}", and

 * "{@code %1$tY}" which indicate how the arguments should be processed and

 * where they should be inserted in the text.  The remaining portions of the

 * format string are fixed text including {@code "Dukes Birthday: "} and any

 * other spaces or punctuation.

 *

 * The argument list consists of all arguments passed to the method after the

 * format string.  In the above example, the argument list is of size one and

 * consists of the {@link java.util.Calendar Calendar} object {@code c}.

 *

 * <ul>

 *

 * <li> The format specifiers for general, character, and numeric types have

 * the following syntax:

 *

 * <blockquote><pre>

 *   %[argument_index$][flags][width][.precision]conversion

 * </pre></blockquote>

 *

 * <p> The optional <i>argument_index</i> is a decimal integer indicating the

 * position of the argument in the argument list.  The first argument is

 * referenced by "{@code 1$}", the second by "{@code 2$}", etc.

 *

 * <p> The optional <i>flags</i> is a set of characters that modify the output

 * format.  The set of valid flags depends on the conversion.

 *

 * <p> The optional <i>width</i> is a positive decimal integer indicating

 * the minimum number of characters to be written to the output.

 *

 * <p> The optional <i>precision</i> is a non-negative decimal integer usually

 * used to restrict the number of characters.  The specific behavior depends on

 * the conversion.

 *

 * <p> The required <i>conversion</i> is a character indicating how the

 * argument should be formatted.  The set of valid conversions for a given

 * argument depends on the argument's data type.

 *

 * <li> The format specifiers for types which are used to represents dates and

 * times have the following syntax:

 *

 * <blockquote><pre>

 *   %[argument_index$][flags][width]conversion

 * </pre></blockquote>

 *

 * <p> The optional <i>argument_index</i>, <i>flags</i> and <i>width</i> are

 * defined as above.

 *

 * <p> The required <i>conversion</i> is a two character sequence.  The first

 * character is {@code 't'} or {@code 'T'}.  The second character indicates

 * the format to be used.  These characters are similar to but not completely

 * identical to those defined by GNU {@code date} and POSIX

 * {@code strftime(3c)}.

 *

 * <li> The format specifiers which do not correspond to arguments have the

 * following syntax:

 *

 * <blockquote><pre>

 *   %[flags][width]conversion

 * </pre></blockquote>

 *

 * <p> The optional <i>flags</i> and <i>width</i> is defined as above.

 *

 * <p> The required <i>conversion</i> is a character indicating content to be

 * inserted in the output.

 *

 * </ul>

 *

 * <h4> Conversions </h4>

 *

 * <p> Conversions are divided into the following categories:

 *

 * <ol>

 *

 * <li> <b>General</b> - may be applied to any argument

 * type

 *

 * <li> <b>Character</b> - may be applied to basic types which represent

 * Unicode characters: {@code char}, {@link Character}, {@code byte}, {@link

 * Byte}, {@code short}, and {@link Short}. This conversion may also be

 * applied to the types {@code int} and {@link Integer} when {@link

 * Character#isValidCodePoint} returns {@code true}

 *

 * <li> <b>Numeric</b>

 *

 * <ol>

 *

 * <li> <b>Integral</b> - may be applied to Java integral types: {@code byte},

 * {@link Byte}, {@code short}, {@link Short}, {@code int} and {@link

 * Integer}, {@code long}, {@link Long}, and {@link java.math.BigInteger

 * BigInteger} (but not {@code char} or {@link Character})

 *

 * <li><b>Floating Point</b> - may be applied to Java floating-point types:

 * {@code float}, {@link Float}, {@code double}, {@link Double}, and {@link

 * java.math.BigDecimal BigDecimal}

 *

 * </ol>

 *

 * <li> <b>Date/Time</b> - may be applied to Java types which are capable of

 * encoding a date or time: {@code long}, {@link Long}, {@link Calendar},

 * {@link Date} and {@link TemporalAccessor TemporalAccessor}

 *

 * <li> <b>Percent</b> - produces a literal {@code '%'}

 * (<tt>'&#92;u0025'</tt>)

 *

 * <li> <b>Line Separator</b> - produces the platform-specific line separator

 *

 * </ol>

 *

 * <p> The following table summarizes the supported conversions.  Conversions

 * denoted by an upper-case character (i.e. {@code 'B'}, {@code 'H'},

 * {@code 'S'}, {@code 'C'}, {@code 'X'}, {@code 'E'}, {@code 'G'},

 * {@code 'A'}, and {@code 'T'}) are the same as those for the corresponding

 * lower-case conversion characters except that the result is converted to

 * upper case according to the rules of the prevailing {@link java.util.Locale

 * Locale}.  The result is equivalent to the following invocation of {@link

 * String#toUpperCase()}

 *

 * <pre>

 *    out.toUpperCase() </pre>

 *

 * <table cellpadding=5 summary="genConv">

 *

 * <tr><th valign="bottom"> Conversion

 *     <th valign="bottom"> Argument Category

 *     <th valign="bottom"> Description

 *

 * <tr><td valign="top"> {@code 'b'}, {@code 'B'}

 *     <td valign="top"> general

 *     <td> If the argument <i>arg</i> is {@code null}, then the result is

 *     "{@code false}".  If <i>arg</i> is a {@code boolean} or {@link

 *     Boolean}, then the result is the string returned by {@link

 *     String#valueOf(boolean) String.valueOf(arg)}.  Otherwise, the result is

 *     "true".

 *

 * <tr><td valign="top"> {@code 'h'}, {@code 'H'}

 *     <td valign="top"> general

 *     <td> If the argument <i>arg</i> is {@code null}, then the result is

 *     "{@code null}".  Otherwise, the result is obtained by invoking

 *     {@code Integer.toHexString(arg.hashCode())}.

 *

 * <tr><td valign="top"> {@code 's'}, {@code 'S'}

 *     <td valign="top"> general

 *     <td> If the argument <i>arg</i> is {@code null}, then the result is

 *     "{@code null}".  If <i>arg</i> implements {@link Formattable}, then

 *     {@link Formattable#formatTo arg.formatTo} is invoked. Otherwise, the

 *     result is obtained by invoking {@code arg.toString()}.

 *

 * <tr><td valign="top">{@code 'c'}, {@code 'C'}

 *     <td valign="top"> character

 *     <td> The result is a Unicode character

 *

 * <tr><td valign="top">{@code 'd'}

 *     <td valign="top"> integral

 *     <td> The result is formatted as a decimal integer

 *

 * <tr><td valign="top">{@code 'o'}

 *     <td valign="top"> integral

 *     <td> The result is formatted as an octal integer

 *

 * <tr><td valign="top">{@code 'x'}, {@code 'X'}

 *     <td valign="top"> integral

 *     <td> The result is formatted as a hexadecimal integer

 *

 * <tr><td valign="top">{@code 'e'}, {@code 'E'}

 *     <td valign="top"> floating point

 *     <td> The result is formatted as a decimal number in computerized

 *     scientific notation

 *

 * <tr><td valign="top">{@code 'f'}

 *     <td valign="top"> floating point

 *     <td> The result is formatted as a decimal number

 *

 * <tr><td valign="top">{@code 'g'}, {@code 'G'}

 *     <td valign="top"> floating point

 *     <td> The result is formatted using computerized scientific notation or

 *     decimal format, depending on the precision and the value after rounding.

 *

 * <tr><td valign="top">{@code 'a'}, {@code 'A'}

 *     <td valign="top"> floating point

 *     <td> The result is formatted as a hexadecimal floating-point number with

 *     a significand and an exponent. This conversion is <b>not</b> supported

 *     for the {@code BigDecimal} type despite the latter's being in the

 *     <i>floating point</i> argument category.

 *

 * <tr><td valign="top">{@code 't'}, {@code 'T'}

 *     <td valign="top"> date/time

 *     <td> Prefix for date and time conversion characters.  See <a

 *     href="#dt">Date/Time Conversions</a>.

 *

 * <tr><td valign="top">{@code '%'}

 *     <td valign="top"> percent

 *     <td> The result is a literal {@code '%'} (<tt>'&#92;u0025'</tt>)

 *

 * <tr><td valign="top">{@code 'n'}

 *     <td valign="top"> line separator

 *     <td> The result is the platform-specific line separator

 *

 * </table>

 *

 * <p> Any characters not explicitly defined as conversions are illegal and are

 * reserved for future extensions.

 *

 * <h4><a name="dt">Date/Time Conversions</a></h4>

 *

 * <p> The following date and time conversion suffix characters are defined for

 * the {@code 't'} and {@code 'T'} conversions.  The types are similar to but

 * not completely identical to those defined by GNU {@code date} and POSIX

 * {@code strftime(3c)}.  Additional conversion types are provided to access

 * Java-specific functionality (e.g. {@code 'L'} for milliseconds within the

 * second).

 *

 * <p> The following conversion characters are used for formatting times:

 *

 * <table cellpadding=5 summary="time">

 *

 * <tr><td valign="top"> {@code 'H'}

 *     <td> Hour of the day for the 24-hour clock, formatted as two digits with

 *     a leading zero as necessary i.e. {@code 00 - 23}.

 *

 * <tr><td valign="top">{@code 'I'}

 *     <td> Hour for the 12-hour clock, formatted as two digits with a leading

 *     zero as necessary, i.e.  {@code 01 - 12}.

 *

 * <tr><td valign="top">{@code 'k'}

 *     <td> Hour of the day for the 24-hour clock, i.e. {@code 0 - 23}.

 *

 * <tr><td valign="top">{@code 'l'}

 *     <td> Hour for the 12-hour clock, i.e. {@code 1 - 12}.

 *

 * <tr><td valign="top">{@code 'M'}

 *     <td> Minute within the hour formatted as two digits with a leading zero

 *     as necessary, i.e.  {@code 00 - 59}.

 *

 * <tr><td valign="top">{@code 'S'}

 *     <td> Seconds within the minute, formatted as two digits with a leading

 *     zero as necessary, i.e. {@code 00 - 60} ("{@code 60}" is a special

 *     value required to support leap seconds).

 *

 * <tr><td valign="top">{@code 'L'}

 *     <td> Millisecond within the second formatted as three digits with

 *     leading zeros as necessary, i.e. {@code 000 - 999}.

 *

 * <tr><td valign="top">{@code 'N'}

 *     <td> Nanosecond within the second, formatted as nine digits with leading

 *     zeros as necessary, i.e. {@code 000000000 - 999999999}.

 *

 * <tr><td valign="top">{@code 'p'}

 *     <td> Locale-specific {@linkplain

 *     java.text.DateFormatSymbols#getAmPmStrings morning or afternoon} marker

 *     in lower case, e.g."{@code am}" or "{@code pm}". Use of the conversion

 *     prefix {@code 'T'} forces this output to upper case.

 *

 * <tr><td valign="top">{@code 'z'}

 *     <td> <a href="http://www.ietf.org/rfc/rfc0822.txt">RFC&nbsp;822</a>

 *     style numeric time zone offset from GMT, e.g. {@code -0800}.  This

 *     value will be adjusted as necessary for Daylight Saving Time.  For

 *     {@code long}, {@link Long}, and {@link Date} the time zone used is

 *     the {@linkplain TimeZone#getDefault() default time zone} for this

 *     instance of the Java virtual machine.

 *

 * <tr><td valign="top">{@code 'Z'}

 *     <td> A string representing the abbreviation for the time zone.  This

 *     value will be adjusted as necessary for Daylight Saving Time.  For

 *     {@code long}, {@link Long}, and {@link Date} the  time zone used is

 *     the {@linkplain TimeZone#getDefault() default time zone} for this

 *     instance of the Java virtual machine.  The Formatter's locale will

 *     supersede the locale of the argument (if any).

 *

 * <tr><td valign="top">{@code 's'}

 *     <td> Seconds since the beginning of the epoch starting at 1 January 1970

 *     {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE/1000} to

 *     {@code Long.MAX_VALUE/1000}.

 *

 * <tr><td valign="top">{@code 'Q'}

 *     <td> Milliseconds since the beginning of the epoch starting at 1 January

 *     1970 {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE} to

 *     {@code Long.MAX_VALUE}.

 *

 * </table>

 *

 * <p> The following conversion characters are used for formatting dates:

 *

 * <table cellpadding=5 summary="date">

 *

 * <tr><td valign="top">{@code 'B'}

 *     <td> Locale-specific {@linkplain java.text.DateFormatSymbols#getMonths

 *     full month name}, e.g. {@code "January"}, {@code "February"}.

 *

 * <tr><td valign="top">{@code 'b'}

 *     <td> Locale-specific {@linkplain

 *     java.text.DateFormatSymbols#getShortMonths abbreviated month name},

 *     e.g. {@code "Jan"}, {@code "Feb"}.

 *

 * <tr><td valign="top">{@code 'h'}

 *     <td> Same as {@code 'b'}.

 *

 * <tr><td valign="top">{@code 'A'}

 *     <td> Locale-specific full name of the {@linkplain

 *     java.text.DateFormatSymbols#getWeekdays day of the week},

 *     e.g. {@code "Sunday"}, {@code "Monday"}

 *

 * <tr><td valign="top">{@code 'a'}

 *     <td> Locale-specific short name of the {@linkplain

 *     java.text.DateFormatSymbols#getShortWeekdays day of the week},

 *     e.g. {@code "Sun"}, {@code "Mon"}

 *

 * <tr><td valign="top">{@code 'C'}

 *     <td> Four-digit year divided by {@code 100}, formatted as two digits

 *     with leading zero as necessary, i.e. {@code 00 - 99}

 *

 * <tr><td valign="top">{@code 'Y'}

 *     <td> Year, formatted as at least four digits with leading zeros as

 *     necessary, e.g. {@code 0092} equals {@code 92} CE for the Gregorian

 *     calendar.

 *

 * <tr><td valign="top">{@code 'y'}

 *     <td> Last two digits of the year, formatted with leading zeros as

 *     necessary, i.e. {@code 00 - 99}.

 *

 * <tr><td valign="top">{@code 'j'}

 *     <td> Day of year, formatted as three digits with leading zeros as

 *     necessary, e.g. {@code 001 - 366} for the Gregorian calendar.

 *

 * <tr><td valign="top">{@code 'm'}

 *     <td> Month, formatted as two digits with leading zeros as necessary,

 *     i.e. {@code 01 - 13}.

 *

 * <tr><td valign="top">{@code 'd'}

 *     <td> Day of month, formatted as two digits with leading zeros as

 *     necessary, i.e. {@code 01 - 31}

 *

 * <tr><td valign="top">{@code 'e'}

 *     <td> Day of month, formatted as two digits, i.e. {@code 1 - 31}.

 *

 * </table>

 *

 * <p> The following conversion characters are used for formatting common

 * date/time compositions.

 *

 * <table cellpadding=5 summary="composites">

 *

 * <tr><td valign="top">{@code 'R'}

 *     <td> Time formatted for the 24-hour clock as {@code "%tH:%tM"}

 *

 * <tr><td valign="top">{@code 'T'}

 *     <td> Time formatted for the 24-hour clock as {@code "%tH:%tM:%tS"}.

 *

 * <tr><td valign="top">{@code 'r'}

 *     <td> Time formatted for the 12-hour clock as {@code "%tI:%tM:%tS %Tp"}.

 *     The location of the morning or afternoon marker ({@code '%Tp'}) may be

 *     locale-dependent.

 *

 * <tr><td valign="top">{@code 'D'}

 *     <td> Date formatted as {@code "%tm/%td/%ty"}.

 *

 * <tr><td valign="top">{@code 'F'}

 *     <td> <a href="http://www.w3.org/TR/NOTE-datetime">ISO&nbsp;8601</a>

 *     complete date formatted as {@code "%tY-%tm-%td"}.

 *

 * <tr><td valign="top">{@code 'c'}

 *     <td> Date and time formatted as {@code "%ta %tb %td %tT %tZ %tY"},

 *     e.g. {@code "Sun Jul 20 16:17:00 EDT 1969"}.

 *

 * </table>

 *

 * <p> Any characters not explicitly defined as date/time conversion suffixes

 * are illegal and are reserved for future extensions.

 *

 * <h4> Flags </h4>

 *

 * <p> The following table summarizes the supported flags.  <i>y</i> means the

 * flag is supported for the indicated argument types.

 *

 * <table cellpadding=5 summary="genConv">

 *

 * <tr><th valign="bottom"> Flag <th valign="bottom"> General

 *     <th valign="bottom"> Character <th valign="bottom"> Integral

 *     <th valign="bottom"> Floating Point

 *     <th valign="bottom"> Date/Time

 *     <th valign="bottom"> Description

 *

 * <tr><td> '-' <td align="center" valign="top"> y

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> y

 *     <td> The result will be left-justified.

 *

 * <tr><td> '#' <td align="center" valign="top"> y<sup>1</sup>

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y<sup>3</sup>

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> -

 *     <td> The result should use a conversion-dependent alternate form

 *

 * <tr><td> '+' <td align="center" valign="top"> -

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y<sup>4</sup>

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> -

 *     <td> The result will always include a sign

 *

 * <tr><td> '&nbsp;&nbsp;' <td align="center" valign="top"> -

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y<sup>4</sup>

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> -

 *     <td> The result will include a leading space for positive values

 *

 * <tr><td> '0' <td align="center" valign="top"> -

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> y

 *     <td align="center" valign="top"> -

 *     <td> The result will be zero-padded

 *

 * <tr><td> ',' <td align="center" valign="top"> -

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y<sup>2</sup>

 *     <td align="center" valign="top"> y<sup>5</sup>

 *     <td align="center" valign="top"> -

 *     <td> The result will include locale-specific {@linkplain

 *     java.text.DecimalFormatSymbols#getGroupingSeparator grouping separators}

 *

 * <tr><td> '(' <td align="center" valign="top"> -

 *     <td align="center" valign="top"> -

 *     <td align="center" valign="top"> y<sup>4</sup>

 *     <td align="center" valign="top"> y<sup>5</sup>

 *     <td align="center"> -

 *     <td> The result will enclose negative numbers in parentheses

 *

 * </table>

 *

 * <p> <sup>1</sup> Depends on the definition of {@link Formattable}.

 *

 * <p> <sup>2</sup> For {@code 'd'} conversion only.

 *

 * <p> <sup>3</sup> For {@code 'o'}, {@code 'x'}, and {@code 'X'}

 * conversions only.

 *

 * <p> <sup>4</sup> For {@code 'd'}, {@code 'o'}, {@code 'x'}, and

 * {@code 'X'} conversions applied to {@link java.math.BigInteger BigInteger}

 * or {@code 'd'} applied to {@code byte}, {@link Byte}, {@code short}, {@link

 * Short}, {@code int} and {@link Integer}, {@code long}, and {@link Long}.

 *

 * <p> <sup>5</sup> For {@code 'e'}, {@code 'E'}, {@code 'f'},

 * {@code 'g'}, and {@code 'G'} conversions only.

 *

 * <p> Any characters not explicitly defined as flags are illegal and are

 * reserved for future extensions.

 *

 * <h4> Width </h4>

 *

 * <p> The width is the minimum number of characters to be written to the

 * output.  For the line separator conversion, width is not applicable; if it

 * is provided, an exception will be thrown.

 *

 * <h4> Precision </h4>

 *

 * <p> For general argument types, the precision is the maximum number of

 * characters to be written to the output.

 *

 * <p> For the floating-point conversions {@code 'a'}, {@code 'A'}, {@code 'e'},

 * {@code 'E'}, and {@code 'f'} the precision is the number of digits after the

 * radix point.  If the conversion is {@code 'g'} or {@code 'G'}, then the

 * precision is the total number of digits in the resulting magnitude after

 * rounding.

 *

 * <p> For character, integral, and date/time argument types and the percent

 * and line separator conversions, the precision is not applicable; if a

 * precision is provided, an exception will be thrown.

 *

 * <h4> Argument Index </h4>

 *

 * <p> The argument index is a decimal integer indicating the position of the

 * argument in the argument list.  The first argument is referenced by

 * "{@code 1$}", the second by "{@code 2$}", etc.

 *

 * <p> Another way to reference arguments by position is to use the

 * {@code '<'} (<tt>'&#92;u003c'</tt>) flag, which causes the argument for

 * the previous format specifier to be re-used.  For example, the following two

 * statements would produce identical strings:

 *

 * <blockquote><pre>

 *   Calendar c = ...;

 *   String s1 = String.format("Duke's Birthday: %1$tm %1$te,%1$tY", c);

 *

 *   String s2 = String.format("Duke's Birthday: %1$tm %<te,%<tY", c);

 * </pre></blockquote>

 *

 * <hr>

 * <h3><a name="detail">Details</a></h3>

 *

 * <p> This section is intended to provide behavioral details for formatting,

 * including conditions and exceptions, supported data types, localization, and

 * interactions between flags, conversions, and data types.  For an overview of

 * formatting concepts, refer to the <a href="#summary">Summary</a>

 *

 * <p> Any characters not explicitly defined as conversions, date/time

 * conversion suffixes, or flags are illegal and are reserved for

 * future extensions.  Use of such a character in a format string will

 * cause an {@link UnknownFormatConversionException} or {@link

 * UnknownFormatFlagsException} to be thrown.

 *

 * <p> If the format specifier contains a width or precision with an invalid

 * value or which is otherwise unsupported, then a {@link

 * IllegalFormatWidthException} or {@link IllegalFormatPrecisionException}

 * respectively will be thrown.

 *

 * <p> If a format specifier contains a conversion character that is not

 * applicable to the corresponding argument, then an {@link

 * IllegalFormatConversionException} will be thrown.

 *

 * <p> All specified exceptions may be thrown by any of the {@code format}

 * methods of {@code Formatter} as well as by any {@code format} convenience

 * methods such as {@link String#format(String,Object...) String.format} and

 * {@link java.io.PrintStream#printf(String,Object...) PrintStream.printf}.

 *

 * <p> Conversions denoted by an upper-case character (i.e. {@code 'B'},

 * {@code 'H'}, {@code 'S'}, {@code 'C'}, {@code 'X'}, {@code 'E'},

 * {@code 'G'}, {@code 'A'}, and {@code 'T'}) are the same as those for the

 * corresponding lower-case conversion characters except that the result is

 * converted to upper case according to the rules of the prevailing {@link

 * java.util.Locale Locale}.  The result is equivalent to the following

 * invocation of {@link String#toUpperCase()}

 *

 * <pre>

 *    out.toUpperCase() </pre>

 *

 * <h4><a name="dgen">General</a></h4>

 *

 * <p> The following general conversions may be applied to any argument type:

 *

 * <table cellpadding=5 summary="dgConv">

 *

 * <tr><td valign="top"> {@code 'b'}

 *     <td valign="top"> <tt>'&#92;u0062'</tt>

 *     <td> Produces either "{@code true}" or "{@code false}" as returned by

 *     {@link Boolean#toString(boolean)}.

 *

 *     <p> If the argument is {@code null}, then the result is

 *     "{@code false}".  If the argument is a {@code boolean} or {@link

 *     Boolean}, then the result is the string returned by {@link

 *     String#valueOf(boolean) String.valueOf()}.  Otherwise, the result is

 *     "{@code true}".

 *

 *     <p> If the {@code '#'} flag is given, then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'B'}

 *     <td valign="top"> <tt>'&#92;u0042'</tt>

 *     <td> The upper-case variant of {@code 'b'}.

 *

 * <tr><td valign="top"> {@code 'h'}

 *     <td valign="top"> <tt>'&#92;u0068'</tt>

 *     <td> Produces a string representing the hash code value of the object.

 *

 *     <p> If the argument, <i>arg</i> is {@code null}, then the

 *     result is "{@code null}".  Otherwise, the result is obtained

 *     by invoking {@code Integer.toHexString(arg.hashCode())}.

 *

 *     <p> If the {@code '#'} flag is given, then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'H'}

 *     <td valign="top"> <tt>'&#92;u0048'</tt>

 *     <td> The upper-case variant of {@code 'h'}.

 *

 * <tr><td valign="top"> {@code 's'}

 *     <td valign="top"> <tt>'&#92;u0073'</tt>

 *     <td> Produces a string.

 *

 *     <p> If the argument is {@code null}, then the result is

 *     "{@code null}".  If the argument implements {@link Formattable}, then

 *     its {@link Formattable#formatTo formatTo} method is invoked.

 *     Otherwise, the result is obtained by invoking the argument's

 *     {@code toString()} method.

 *

 *     <p> If the {@code '#'} flag is given and the argument is not a {@link

 *     Formattable} , then a {@link FormatFlagsConversionMismatchException}

 *     will be thrown.

 *

 * <tr><td valign="top"> {@code 'S'}

 *     <td valign="top"> <tt>'&#92;u0053'</tt>

 *     <td> The upper-case variant of {@code 's'}.

 *

 * </table>

 *

 * <p> The following <a name="dFlags">flags</a> apply to general conversions:

 *

 * <table cellpadding=5 summary="dFlags">

 *

 * <tr><td valign="top"> {@code '-'}

 *     <td valign="top"> <tt>'&#92;u002d'</tt>

 *     <td> Left justifies the output.  Spaces (<tt>'&#92;u0020'</tt>) will be

 *     added at the end of the converted value as required to fill the minimum

 *     width of the field.  If the width is not provided, then a {@link

 *     MissingFormatWidthException} will be thrown.  If this flag is not given

 *     then the output will be right-justified.

 *

 * <tr><td valign="top"> {@code '#'}

 *     <td valign="top"> <tt>'&#92;u0023'</tt>

 *     <td> Requires the output use an alternate form.  The definition of the

 *     form is specified by the conversion.

 *

 * </table>

 *

 * <p> The <a name="genWidth">width</a> is the minimum number of characters to

 * be written to the

 * output.  If the length of the converted value is less than the width then

 * the output will be padded by <tt>'&nbsp;&nbsp;'</tt> (<tt>'&#92;u0020'</tt>)

 * until the total number of characters equals the width.  The padding is on

 * the left by default.  If the {@code '-'} flag is given, then the padding

 * will be on the right.  If the width is not specified then there is no

 * minimum.

 *

 * <p> The precision is the maximum number of characters to be written to the

 * output.  The precision is applied before the width, thus the output will be

 * truncated to {@code precision} characters even if the width is greater than

 * the precision.  If the precision is not specified then there is no explicit

 * limit on the number of characters.

 *

 * <h4><a name="dchar">Character</a></h4>

 *

 * This conversion may be applied to {@code char} and {@link Character}.  It

 * may also be applied to the types {@code byte}, {@link Byte},

 * {@code short}, and {@link Short}, {@code int} and {@link Integer} when

 * {@link Character#isValidCodePoint} returns {@code true}.  If it returns

 * {@code false} then an {@link IllegalFormatCodePointException} will be

 * thrown.

 *

 * <table cellpadding=5 summary="charConv">

 *

 * <tr><td valign="top"> {@code 'c'}

 *     <td valign="top"> <tt>'&#92;u0063'</tt>

 *     <td> Formats the argument as a Unicode character as described in <a

 *     href="../lang/Character.html#unicode">Unicode Character

 *     Representation</a>.  This may be more than one 16-bit {@code char} in

 *     the case where the argument represents a supplementary character.

 *

 *     <p> If the {@code '#'} flag is given, then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'C'}

 *     <td valign="top"> <tt>'&#92;u0043'</tt>

 *     <td> The upper-case variant of {@code 'c'}.

 *

 * </table>

 *

 * <p> The {@code '-'} flag defined for <a href="#dFlags">General

 * conversions</a> applies.  If the {@code '#'} flag is given, then a {@link

 * FormatFlagsConversionMismatchException} will be thrown.

 *

 * <p> The width is defined as for <a href="#genWidth">General conversions</a>.

 *

 * <p> The precision is not applicable.  If the precision is specified then an

 * {@link IllegalFormatPrecisionException} will be thrown.

 *

 * <h4><a name="dnum">Numeric</a></h4>

 *

 * <p> Numeric conversions are divided into the following categories:

 *

 * <ol>

 *

 * <li> <a href="#dnint"><b>Byte, Short, Integer, and Long</b></a>

 *

 * <li> <a href="#dnbint"><b>BigInteger</b></a>

 *

 * <li> <a href="#dndec"><b>Float and Double</b></a>

 *

 * <li> <a href="#dnbdec"><b>BigDecimal</b></a>

 *

 * </ol>

 *

 * <p> Numeric types will be formatted according to the following algorithm:

 *

 * <p><b><a name="L10nAlgorithm"> Number Localization Algorithm</a></b>

 *

 * <p> After digits are obtained for the integer part, fractional part, and

 * exponent (as appropriate for the data type), the following transformation

 * is applied:

 *

 * <ol>

 *

 * <li> Each digit character <i>d</i> in the string is replaced by a

 * locale-specific digit computed relative to the current locale's

 * {@linkplain java.text.DecimalFormatSymbols#getZeroDigit() zero digit}

 * <i>z</i>; that is <i>d&nbsp;-&nbsp;</i> {@code '0'}

 * <i>&nbsp;+&nbsp;z</i>.

 *

 * <li> If a decimal separator is present, a locale-specific {@linkplain

 * java.text.DecimalFormatSymbols#getDecimalSeparator decimal separator} is

 * substituted.

 *

 * <li> If the {@code ','} (<tt>'&#92;u002c'</tt>)

 * <a name="L10nGroup">flag</a> is given, then the locale-specific {@linkplain

 * java.text.DecimalFormatSymbols#getGroupingSeparator grouping separator} is

 * inserted by scanning the integer part of the string from least significant

 * to most significant digits and inserting a separator at intervals defined by

 * the locale's {@linkplain java.text.DecimalFormat#getGroupingSize() grouping

 * size}.

 *

 * <li> If the {@code '0'} flag is given, then the locale-specific {@linkplain

 * java.text.DecimalFormatSymbols#getZeroDigit() zero digits} are inserted

 * after the sign character, if any, and before the first non-zero digit, until

 * the length of the string is equal to the requested field width.

 *

 * <li> If the value is negative and the {@code '('} flag is given, then a

 * {@code '('} (<tt>'&#92;u0028'</tt>) is prepended and a {@code ')'}

 * (<tt>'&#92;u0029'</tt>) is appended.

 *

 * <li> If the value is negative (or floating-point negative zero) and

 * {@code '('} flag is not given, then a {@code '-'} (<tt>'&#92;u002d'</tt>)

 * is prepended.

 *

 * <li> If the {@code '+'} flag is given and the value is positive or zero (or

 * floating-point positive zero), then a {@code '+'} (<tt>'&#92;u002b'</tt>)

 * will be prepended.

 *

 * </ol>

 *

 * <p> If the value is NaN or positive infinity the literal strings "NaN" or

 * "Infinity" respectively, will be output.  If the value is negative infinity,

 * then the output will be "(Infinity)" if the {@code '('} flag is given

 * otherwise the output will be "-Infinity".  These values are not localized.

 *

 * <p><a name="dnint"><b> Byte, Short, Integer, and Long </b></a>

 *

 * <p> The following conversions may be applied to {@code byte}, {@link Byte},

 * {@code short}, {@link Short}, {@code int} and {@link Integer},

 * {@code long}, and {@link Long}.

 *

 * <table cellpadding=5 summary="IntConv">

 *

 * <tr><td valign="top"> {@code 'd'}

 *     <td valign="top"> <tt>'&#92;u0064'</tt>

 *     <td> Formats the argument as a decimal integer. The <a

 *     href="#L10nAlgorithm">localization algorithm</a> is applied.

 *

 *     <p> If the {@code '0'} flag is given and the value is negative, then

 *     the zero padding will occur after the sign.

 *

 *     <p> If the {@code '#'} flag is given then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'o'}

 *     <td valign="top"> <tt>'&#92;u006f'</tt>

 *     <td> Formats the argument as an integer in base eight.  No localization

 *     is applied.

 *

 *     <p> If <i>x</i> is negative then the result will be an unsigned value

 *     generated by adding 2<sup>n</sup> to the value where {@code n} is the

 *     number of bits in the type as returned by the static {@code SIZE} field

 *     in the {@linkplain Byte#SIZE Byte}, {@linkplain Short#SIZE Short},

 *     {@linkplain Integer#SIZE Integer}, or {@linkplain Long#SIZE Long}

 *     classes as appropriate.

 *

 *     <p> If the {@code '#'} flag is given then the output will always begin

 *     with the radix indicator {@code '0'}.

 *

 *     <p> If the {@code '0'} flag is given then the output will be padded

 *     with leading zeros to the field width following any indication of sign.

 *

 *     <p> If {@code '('}, {@code '+'}, '&nbsp;&nbsp;', or {@code ','} flags

 *     are given then a {@link FormatFlagsConversionMismatchException} will be

 *     thrown.

 *

 * <tr><td valign="top"> {@code 'x'}

 *     <td valign="top"> <tt>'&#92;u0078'</tt>

 *     <td> Formats the argument as an integer in base sixteen. No

 *     localization is applied.

 *

 *     <p> If <i>x</i> is negative then the result will be an unsigned value

 *     generated by adding 2<sup>n</sup> to the value where {@code n} is the

 *     number of bits in the type as returned by the static {@code SIZE} field

 *     in the {@linkplain Byte#SIZE Byte}, {@linkplain Short#SIZE Short},

 *     {@linkplain Integer#SIZE Integer}, or {@linkplain Long#SIZE Long}

 *     classes as appropriate.

 *

 *     <p> If the {@code '#'} flag is given then the output will always begin

 *     with the radix indicator {@code "0x"}.

 *

 *     <p> If the {@code '0'} flag is given then the output will be padded to

 *     the field width with leading zeros after the radix indicator or sign (if

 *     present).

 *

 *     <p> If {@code '('}, <tt>'&nbsp;&nbsp;'</tt>, {@code '+'}, or

 *     {@code ','} flags are given then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'X'}

 *     <td valign="top"> <tt>'&#92;u0058'</tt>

 *     <td> The upper-case variant of {@code 'x'}.  The entire string

 *     representing the number will be converted to {@linkplain

 *     String#toUpperCase upper case} including the {@code 'x'} (if any) and

 *     all hexadecimal digits {@code 'a'} - {@code 'f'}

 *     (<tt>'&#92;u0061'</tt> -  <tt>'&#92;u0066'</tt>).

 *

 * </table>

 *

 * <p> If the conversion is {@code 'o'}, {@code 'x'}, or {@code 'X'} and

 * both the {@code '#'} and the {@code '0'} flags are given, then result will

 * contain the radix indicator ({@code '0'} for octal and {@code "0x"} or

 * {@code "0X"} for hexadecimal), some number of zeros (based on the width),

 * and the value.

 *

 * <p> If the {@code '-'} flag is not given, then the space padding will occur

 * before the sign.

 *

 * <p> The following <a name="intFlags">flags</a> apply to numeric integral

 * conversions:

 *

 * <table cellpadding=5 summary="intFlags">

 *

 * <tr><td valign="top"> {@code '+'}

 *     <td valign="top"> <tt>'&#92;u002b'</tt>

 *     <td> Requires the output to include a positive sign for all positive

 *     numbers.  If this flag is not given then only negative values will

 *     include a sign.

 *

 *     <p> If both the {@code '+'} and <tt>'&nbsp;&nbsp;'</tt> flags are given

 *     then an {@link IllegalFormatFlagsException} will be thrown.

 *

 * <tr><td valign="top"> <tt>'&nbsp;&nbsp;'</tt>

 *     <td valign="top"> <tt>'&#92;u0020'</tt>

 *     <td> Requires the output to include a single extra space

 *     (<tt>'&#92;u0020'</tt>) for non-negative values.

 *

 *     <p> If both the {@code '+'} and <tt>'&nbsp;&nbsp;'</tt> flags are given

 *     then an {@link IllegalFormatFlagsException} will be thrown.

 *

 * <tr><td valign="top"> {@code '0'}

 *     <td valign="top"> <tt>'&#92;u0030'</tt>

 *     <td> Requires the output to be padded with leading {@linkplain

 *     java.text.DecimalFormatSymbols#getZeroDigit zeros} to the minimum field

 *     width following any sign or radix indicator except when converting NaN

 *     or infinity.  If the width is not provided, then a {@link

 *     MissingFormatWidthException} will be thrown.

 *

 *     <p> If both the {@code '-'} and {@code '0'} flags are given then an

 *     {@link IllegalFormatFlagsException} will be thrown.

 *

 * <tr><td valign="top"> {@code ','}

 *     <td valign="top"> <tt>'&#92;u002c'</tt>

 *     <td> Requires the output to include the locale-specific {@linkplain

 *     java.text.DecimalFormatSymbols#getGroupingSeparator group separators} as

 *     described in the <a href="#L10nGroup">"group" section</a> of the

 *     localization algorithm.

 *

 * <tr><td valign="top"> {@code '('}

 *     <td valign="top"> <tt>'&#92;u0028'</tt>

 *     <td> Requires the output to prepend a {@code '('}

 *     (<tt>'&#92;u0028'</tt>) and append a {@code ')'}

 *     (<tt>'&#92;u0029'</tt>) to negative values.

 *

 * </table>

 *

 * <p> If no <a name="intdFlags">flags</a> are given the default formatting is

 * as follows:

 *

 * <ul>

 *

 * <li> The output is right-justified within the {@code width}

 *

 * <li> Negative numbers begin with a {@code '-'} (<tt>'&#92;u002d'</tt>)

 *

 * <li> Positive numbers and zero do not include a sign or extra leading

 * space

 *

 * <li> No grouping separators are included

 *

 * </ul>

 *

 * <p> The <a name="intWidth">width</a> is the minimum number of characters to

 * be written to the output.  This includes any signs, digits, grouping

 * separators, radix indicator, and parentheses.  If the length of the

 * converted value is less than the width then the output will be padded by

 * spaces (<tt>'&#92;u0020'</tt>) until the total number of characters equals

 * width.  The padding is on the left by default.  If {@code '-'} flag is

 * given then the padding will be on the right.  If width is not specified then

 * there is no minimum.

 *

 * <p> The precision is not applicable.  If precision is specified then an

 * {@link IllegalFormatPrecisionException} will be thrown.

 *

 * <p><a name="dnbint"><b> BigInteger </b></a>

 *

 * <p> The following conversions may be applied to {@link

 * java.math.BigInteger}.

 *

 * <table cellpadding=5 summary="BIntConv">

 *

 * <tr><td valign="top"> {@code 'd'}

 *     <td valign="top"> <tt>'&#92;u0064'</tt>

 *     <td> Requires the output to be formatted as a decimal integer. The <a

 *     href="#L10nAlgorithm">localization algorithm</a> is applied.

 *

 *     <p> If the {@code '#'} flag is given {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'o'}

 *     <td valign="top"> <tt>'&#92;u006f'</tt>

 *     <td> Requires the output to be formatted as an integer in base eight.

 *     No localization is applied.

 *

 *     <p> If <i>x</i> is negative then the result will be a signed value

 *     beginning with {@code '-'} (<tt>'&#92;u002d'</tt>).  Signed output is

 *     allowed for this type because unlike the primitive types it is not

 *     possible to create an unsigned equivalent without assuming an explicit

 *     data-type size.

 *

 *     <p> If <i>x</i> is positive or zero and the {@code '+'} flag is given

 *     then the result will begin with {@code '+'} (<tt>'&#92;u002b'</tt>).

 *

 *     <p> If the {@code '#'} flag is given then the output will always begin

 *     with {@code '0'} prefix.

 *

 *     <p> If the {@code '0'} flag is given then the output will be padded

 *     with leading zeros to the field width following any indication of sign.

 *

 *     <p> If the {@code ','} flag is given then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'x'}

 *     <td valign="top"> <tt>'&#92;u0078'</tt>

 *     <td> Requires the output to be formatted as an integer in base

 *     sixteen.  No localization is applied.

 *

 *     <p> If <i>x</i> is negative then the result will be a signed value

 *     beginning with {@code '-'} (<tt>'&#92;u002d'</tt>).  Signed output is

 *     allowed for this type because unlike the primitive types it is not

 *     possible to create an unsigned equivalent without assuming an explicit

 *     data-type size.

 *

 *     <p> If <i>x</i> is positive or zero and the {@code '+'} flag is given

 *     then the result will begin with {@code '+'} (<tt>'&#92;u002b'</tt>).

 *

 *     <p> If the {@code '#'} flag is given then the output will always begin

 *     with the radix indicator {@code "0x"}.

 *

 *     <p> If the {@code '0'} flag is given then the output will be padded to

 *     the field width with leading zeros after the radix indicator or sign (if

 *     present).

 *

 *     <p> If the {@code ','} flag is given then a {@link

 *     FormatFlagsConversionMismatchException} will be thrown.

 *

 * <tr><td valign="top"> {@code 'X'}

 *     <td valign="top"> <tt>'&#92;u0058'</tt>

 *     <td> The upper-case variant of {@code 'x'}.  The entire string

 *     representing the number will be converted to {@linkplain

 *     String#toUpperCase upper case} including the {@code 'x'} (if any) and

 *     all hexadecimal digits {@code 'a'} - {@code 'f'}

 *     (<tt>'&#92;u0061'</tt> - <tt>'&#92;u0066'</tt>).

 *

 * </table>

 *

 * <p> If the conversion is {@code 'o'}, {@code 'x'}, or {@code 'X'} and

 * both the {@code '#'} and the {@code '0'} flags are given, then result will

 * contain the base indicator ({@code '0'} for octal and {@code "0x"} or

 * {@code "0X"} for hexadecimal), some number of zeros (based on the width),

 * and the value.

 *

 * <p> If the {@code '0'} flag is given and the value is negative, then the

 * zero padding will occur after the sign.

 *

 * <p> If the {@code '-'} flag is not given, then the space padding will occur

 * before the sign.

 *

 * <p> All <a href="#intFlags">flags</a> defined for Byte, Short, Integer, and

 * Long apply.  The <a href="#intdFlags">default behavior</a> when no flags are

 * given is the same as for Byte, Short, Integer, and Long.

 *

 * <p> The specification of <a href="#intWidth">width</a> is the same as

 * defined for Byte, Short, Integer, and Long.

 *

 * <p> The precision is not applicable.  If precision is specified then an

 * {@link IllegalFormatPrecisionException} will be thrown.

 *

 * <p><a name="dndec"><b> Float and Double</b></a>

 *

 * <p> The following conversions may be applied to {@code float}, {@link

 * Float}, {@code double} and {@link Double}.

 *

 * <table cellpadding=5 summary="floatConv">

 *

 * <tr><td valign="top"> {@code 'e'}

 *     <td valign="top"> <tt>'&#92;u0065'</tt>