java.text
Class SimpleDateFormat

java.lang.Object
  java.text.Format
      java.text.DateFormat
          java.text.SimpleDateFormat

All Implemented Interfaces:

Cloneable, Serializable

public class SimpleDateFormat

extends DateFormat

SimpleDateFormat is a concrete class for formatting and parsing dates in a locale-sensitive manner. It allows for formatting (date -> text), parsing (text -> date), and normalization.

SimpleDateFormat allows you to start by choosing any user-defined patterns for date-time formatting. However, you are encouraged to create a date-time formatter with either getTimeInstance, getDateInstance, or getDateTimeInstance in DateFormat. Each of these class methods can return a date/time formatter initialized with a default format pattern. You may modify the format pattern using the applyPattern methods as desired. For more information on using these methods, see DateFormat.

Date and Time Patterns

Date and time formats are specified by date and time pattern strings. Within date and time pattern strings, unquoted letters from 'A' to 'Z' and from 'a' to 'z' are interpreted as pattern letters representing the components of a date or time string. Text can be quoted using single quotes (') to avoid interpretation. "''" represents a single quote. All other characters are not interpreted; they're simply copied into the output string during formatting or matched against the input string during parsing.

The following pattern letters are defined (all other characters from 'A' to 'Z' and from 'a' to 'z' are reserved):

Letter	Date or Time Component	Presentation	Examples
G	Era designator	Text	AD
y	Year	Year	1996; 96
M	Month in year	Month	July; Jul; 07
w	Week in year	Number	27
W	Week in month	Number	2
D	Day in year	Number	189
d	Day in month	Number	10
F	Day of week in month	Number	2
E	Day in week	Text	Tuesday; Tue
a	Am/pm marker	Text	PM
H	Hour in day (0-23)	Number	0
k	Hour in day (1-24)	Number	24
K	Hour in am/pm (0-11)	Number	0
h	Hour in am/pm (1-12)	Number	12
m	Minute in hour	Number	30
s	Second in minute	Number	55
S	Millisecond	Number	978
z	Time zone	General time zone	Pacific Standard Time; PST; GMT-08:00
Z	Time zone	RFC 822 time zone	-0800

Pattern letters are usually repeated, as their number determines the exact presentation:

• Text: For formatting, if the number of pattern letters is 4 or more, the full form is used; otherwise a short or abbreviated form is used if available. For parsing, both forms are accepted, independent of the number of pattern letters.
• Number: For formatting, the number of pattern letters is the minimum number of digits, and shorter numbers are zero-padded to this amount. For parsing, the number of pattern letters is ignored unless it's needed to separate two adjacent fields.
• Year: For formatting, if the number of pattern letters is 2, the year is truncated to 2 digits; otherwise it is interpreted as a number.

  For parsing, if the number of pattern letters is more than 2, the year is interpreted literally, regardless of the number of digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to Jan 11, 12 A.D.

  For parsing with the abbreviated year pattern ("y" or "yy"), SimpleDateFormat must interpret the abbreviated year relative to some century. It does this by adjusting dates to be within 80 years before and 20 years after the time the SimpleDateFormat instance is created. For example, using a pattern of "MM/dd/yy" and a SimpleDateFormat instance created on Jan 1, 1997, the string "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64" would be interpreted as May 4, 1964. During parsing, only strings consisting of exactly two digits, as defined by Character.isDigit(char), will be parsed into the default century. Any other numeric string, such as a one digit string, a three or more digit string, or a two digit string that isn't all digits (for example, "-1"), is interpreted literally. So "01/02/3" or "01/02/003" are parsed, using the same pattern, as Jan 2, 3 AD. Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.

• Month: If the number of pattern letters is 3 or more, the month is interpreted as text; otherwise, it is interpreted as a number.
• General time zone: Time zones are interpreted as text if they have names. For time zones representing a GMT offset value, the following syntax is used:

       GMTOffsetTimeZone:
               GMT Sign Hours : Minutes
       Sign: one of
               + -
       Hours:
               Digit
               Digit Digit
       Minutes:
               Digit Digit
       Digit: one of
               0 1 2 3 4 5 6 7 8 9

  Hours must be between 0 and 23, and Minutes must be between 00 and 59. The format is locale independent and digits must be taken from the Basic Latin block of the Unicode standard.

  For parsing, RFC 822 time zones are also accepted.

• RFC 822 time zone: For formatting, the RFC 822 4-digit time zone format is used:

       RFC822TimeZone:
               Sign TwoDigitHours Minutes
       TwoDigitHours:
               Digit Digit

  TwoDigitHours must be between 00 and 23. Other definitions are as for general time zones.

  For parsing, general time zones are also accepted.

SimpleDateFormat also supports localized date and time pattern strings. In these strings, the pattern letters described above may be replaced with other, locale dependent, pattern letters. SimpleDateFormat does not deal with the localization of text other than the pattern letters; that's up to the client of the class.

Examples

The following examples show how date and time patterns are interpreted in the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time in the U.S. Pacific Time time zone.

Date and Time Pattern	Result
"yyyy.MM.dd G 'at' HH:mm:ss z"	2001.07.04 AD at 12:08:56 PDT
"EEE, MMM d, ''yy"	Wed, Jul 4, '01
"h:mm a"	12:08 PM
"hh 'o''clock' a, zzzz"	12 o'clock PM, Pacific Daylight Time
"K:mm a, z"	0:08 PM, PDT
"yyyyy.MMMMM.dd GGG hh:mm aaa"	02001.July.04 AD 12:08 PM
"EEE, d MMM yyyy HH:mm:ss Z"	Wed, 4 Jul 2001 12:08:56 -0700
"yyMMddHHmmssZ"	010704120856-0700

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.

Author:

Mark Davis, Chen-Lieh Huang, Alan Liu

See Also:

Java Tutorial, Calendar, TimeZone, DateFormat, DateFormatSymbols, Serialized Form

Nested Class Summary

Nested classes inherited from class java.text.DateFormat

DateFormat.Field

Nested classes inherited from class java.text.Format

Format.FieldDelegate

Field Summary

private static Hashtable	cachedLocaleData Cache to hold the DateTimePatterns of a Locale.
private static Hashtable	cachedNumberFormatData Cache NumberFormat instances with Locale key.
private char[]	compiledPattern The compiled pattern.
(package private) static int	currentSerialVersion
private Date	defaultCenturyStart We map dates with two-digit years into the century starting at defaultCenturyStart, which may be any date.
private int	defaultCenturyStartYear
private DateFormatSymbols	formatData The symbols used by this formatter for week names, month names, etc.
private static String	GMT
private static String	GMT_MINUS
private static String	GMT_PLUS
private static int	millisPerHour
private static int	millisPerMinute
private String	pattern The pattern string of this formatter.
private static int[]	PATTERN_INDEX_TO_CALENDAR_FIELD
private static int[]	PATTERN_INDEX_TO_DATE_FORMAT_FIELD
private static DateFormat.Field[]	PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID
private int	serialVersionOnStream The version of the serialized data on the stream.
(package private) static long	serialVersionUID
private static int	TAG_QUOTE_ASCII_CHAR Tags for the compiled pattern.
private static int	TAG_QUOTE_CHARS
private char	zeroDigit Locale dependent digit zero.

Fields inherited from class java.text.DateFormat

AM_PM_FIELD, calendar, DATE_FIELD, DAY_OF_WEEK_FIELD, DAY_OF_WEEK_IN_MONTH_FIELD, DAY_OF_YEAR_FIELD, DEFAULT, ERA_FIELD, FULL, HOUR_OF_DAY0_FIELD, HOUR_OF_DAY1_FIELD, HOUR0_FIELD, HOUR1_FIELD, LONG, MEDIUM, MILLISECOND_FIELD, MINUTE_FIELD, MONTH_FIELD, numberFormat, SECOND_FIELD, SHORT, TIMEZONE_FIELD, WEEK_OF_MONTH_FIELD, WEEK_OF_YEAR_FIELD, YEAR_FIELD

Constructor Summary

	SimpleDateFormat() Constructs a SimpleDateFormat using the default pattern and date format symbols for the default locale.
(package private)	SimpleDateFormat(int timeStyle, int dateStyle, Locale loc)
	SimpleDateFormat(String pattern) Constructs a SimpleDateFormat using the given pattern and the default date format symbols for the default locale.
	SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols) Constructs a SimpleDateFormat using the given pattern and date format symbols.
	SimpleDateFormat(String pattern, Locale locale) Constructs a SimpleDateFormat using the given pattern and the default date format symbols for the given locale.

Method Summary

void	applyLocalizedPattern(String pattern) Applies the given localized pattern string to this date format.
void	applyPattern(String pattern) Applies the given pattern string to this date format.
Object	clone() Creates a copy of this SimpleDateFormat.
private char[]	compile(String pattern) Returns the compiled form of the given pattern.
private static void	encode(int tag, int length, StringBuffer buffer) Encodes the given tag and length and puts encoded char(s) into buffer.
boolean	equals(Object obj) Compares the given object with this SimpleDateFormat for equality.
StringBuffer	format(Date date, StringBuffer toAppendTo, FieldPosition pos) Formats the given Date into a date/time string and appends the result to the given StringBuffer.
private StringBuffer	format(Date date, StringBuffer toAppendTo, Format.FieldDelegate delegate)
AttributedCharacterIterator	formatToCharacterIterator(Object obj) Formats an Object producing an AttributedCharacterIterator.
Date	get2DigitYearStart() Returns the beginning date of the 100-year period 2-digit years are interpreted as being within.
DateFormatSymbols	getDateFormatSymbols() Gets a copy of the date and time format symbols of this date format.
int	hashCode() Returns the hash code value for this SimpleDateFormat object.
private void	initialize(Locale loc)
private void	initializeDefaultCentury()
private int	matchString(String text, int start, int field, String[] data) Private code-size reduction function used by subParse.
private int	matchZoneString(String text, int start, int zoneIndex)
Date	parse(String text, ParsePosition pos) Parses text from a string to produce a Date.
private void	parseAmbiguousDatesAsAfter(Date startDate)
private void	readObject(ObjectInputStream stream) After reading an object from the input stream, the format pattern in the object is verified.
void	set2DigitYearStart(Date startDate) Sets the 100-year period 2-digit years will be interpreted as being in to begin on the date the user specifies.
void	setDateFormatSymbols(DateFormatSymbols newFormatSymbols) Sets the date and time format symbols of this date format.
private void	subFormat(int patternCharIndex, int count, Format.FieldDelegate delegate, StringBuffer buffer) Private member function that does the real date/time formatting.
private int	subParse(String text, int start, int patternCharIndex, int count, boolean obeyCount, boolean[] ambiguousYear, ParsePosition origPos) Private member function that converts the parsed date strings into timeFields.
private int	subParseZoneString(String text, int start) find time zone 'text' matched zoneStrings and set to internal calendar.
String	toLocalizedPattern() Returns a localized pattern string describing this date format.
String	toPattern() Returns a pattern string describing this date format.
private String	translatePattern(String pattern, String from, String to) Translates a pattern, mapping each character in the from string to the corresponding character in the to string.
private void	zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer) Formats a number with the specified minimum and maximum number of digits.

Methods inherited from class java.text.DateFormat

format, format, getAvailableLocales, getCalendar, getDateInstance, getDateInstance, getDateInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getInstance, getNumberFormat, getTimeInstance, getTimeInstance, getTimeInstance, getTimeZone, isLenient, parse, parseObject, setCalendar, setLenient, setNumberFormat, setTimeZone

Methods inherited from class java.text.Format

createAttributedCharacterIterator, createAttributedCharacterIterator, createAttributedCharacterIterator, createAttributedCharacterIterator, format, parseObject

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

currentSerialVersion

static final int currentSerialVersion

See Also:

Constant Field Values

serialVersionOnStream

private int serialVersionOnStream

The version of the serialized data on the stream. Possible values:

• 0 or not present on stream: JDK 1.1.3. This version has no defaultCenturyStart on stream.
• 1 JDK 1.1.4 or later. This version adds defaultCenturyStart.

When streaming out this class, the most recent format and the highest allowable serialVersionOnStream is written.

Since:

JDK1.1.4

pattern

private String pattern

The pattern string of this formatter. This is always a non-localized pattern. May not be null. See class documentation for details.

compiledPattern

private transient char[] compiledPattern

The compiled pattern.

TAG_QUOTE_ASCII_CHAR

private static final int TAG_QUOTE_ASCII_CHAR

Tags for the compiled pattern.

See Also:

Constant Field Values

TAG_QUOTE_CHARS

private static final int TAG_QUOTE_CHARS

See Also:

Constant Field Values

zeroDigit

private transient char zeroDigit

Locale dependent digit zero.

See Also:

zeroPaddingNumber(int, int, int, java.lang.StringBuffer), DecimalFormatSymbols.getZeroDigit()

formatData

private DateFormatSymbols formatData

The symbols used by this formatter for week names, month names, etc. May not be null.

See Also:

DateFormatSymbols

defaultCenturyStart

private Date defaultCenturyStart

We map dates with two-digit years into the century starting at defaultCenturyStart, which may be any date. May not be null.

Since:

JDK1.1.4

defaultCenturyStartYear

private transient int defaultCenturyStartYear

millisPerHour

private static final int millisPerHour

See Also:

Constant Field Values

millisPerMinute

private static final int millisPerMinute

See Also:

Constant Field Values

GMT_PLUS

private static final String GMT_PLUS

See Also:

Constant Field Values

GMT_MINUS

private static final String GMT_MINUS

See Also:

Constant Field Values

GMT

private static final String GMT

See Also:

Constant Field Values

cachedLocaleData

private static Hashtable cachedLocaleData

Cache to hold the DateTimePatterns of a Locale.

cachedNumberFormatData

private static Hashtable cachedNumberFormatData

Cache NumberFormat instances with Locale key.

PATTERN_INDEX_TO_CALENDAR_FIELD

private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD

PATTERN_INDEX_TO_DATE_FORMAT_FIELD

private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD

PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID

private static final DateFormat.Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID

Constructor Detail

SimpleDateFormat

public SimpleDateFormat()

Constructs a SimpleDateFormat using the default pattern and date format symbols for the default locale. Note: This constructor may not support all locales. For full coverage, use the factory methods in the DateFormat class.

SimpleDateFormat

public SimpleDateFormat(String pattern)

Constructs a SimpleDateFormat using the given pattern and the default date format symbols for the default locale. Note: This constructor may not support all locales. For full coverage, use the factory methods in the DateFormat class.

Parameters:

pattern - the pattern describing the date and time format

Throws:

NullPointerException - if the given pattern is null

IllegalArgumentException - if the given pattern is invalid

SimpleDateFormat

public SimpleDateFormat(String pattern,
                        Locale locale)

Constructs a SimpleDateFormat using the given pattern and the default date format symbols for the given locale. Note: This constructor may not support all locales. For full coverage, use the factory methods in the DateFormat class.

Parameters:

pattern - the pattern describing the date and time format

locale - the locale whose date format symbols should be used

Throws:

NullPointerException - if the given pattern is null

IllegalArgumentException - if the given pattern is invalid

SimpleDateFormat

public SimpleDateFormat(String pattern,
                        DateFormatSymbols formatSymbols)

Constructs a SimpleDateFormat using the given pattern and date format symbols.

Parameters:

pattern - the pattern describing the date and time format

formatSymbols - the date format symbols to be used for formatting

Throws:

NullPointerException - if the given pattern or formatSymbols is null

IllegalArgumentException - if the given pattern is invalid

SimpleDateFormat

SimpleDateFormat(int timeStyle,
                 int dateStyle,
                 Locale loc)

Method Detail

initialize

private void initialize(Locale loc)

compile

private char[] compile(String pattern)

Returns the compiled form of the given pattern. The syntax of the compiled pattern is:

CompiledPattern: EntryList EntryList: Entry EntryList Entry Entry: TagField TagField data TagField: Tag Length TaggedData Tag: pattern_char_index TAG_QUOTE_CHARS Length: short_length long_length TaggedData: TAG_QUOTE_ASCII_CHAR ascii_char

where `short_length' is an 8-bit unsigned integer between 0 and 254. `long_length' is a sequence of an 8-bit integer 255 and a 32-bit signed integer value which is split into upper and lower 16-bit fields in two char's. `pattern_char_index' is an 8-bit integer between 0 and 18. `ascii_char' is an 7-bit ASCII character value. `data' depends on its Tag value.

If Length is short_length, Tag and short_length are packed in a single char, as illustrated below.

char[0] = (Tag << 8) | short_length;

If Length is long_length, Tag and 255 are packed in the first char and a 32-bit integer, as illustrated below.

char[0] = (Tag << 8) | 255; char[1] = (char) (long_length >>> 16); char[2] = (char) (long_length & 0xffff);

If Tag is a pattern_char_index, its Length is the number of pattern characters. For example, if the given pattern is "yyyy", Tag is 1 and Length is 4, followed by no data.

If Tag is TAG_QUOTE_CHARS, its Length is the number of char's following the TagField. For example, if the given pattern is "'o''clock'", Length is 7 followed by a char sequence of o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k.

TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII character in place of Length. For example, if the given pattern is "'o'", the TaggedData entry is ((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o').

Throws:

NullPointerException - if the given pattern is null

IllegalArgumentException - if the given pattern is invalid

encode

private static final void encode(int tag,
                                 int length,
                                 StringBuffer buffer)

Encodes the given tag and length and puts encoded char(s) into buffer.

initializeDefaultCentury

private void initializeDefaultCentury()

parseAmbiguousDatesAsAfter

private void parseAmbiguousDatesAsAfter(Date startDate)

set2DigitYearStart

public void set2DigitYearStart(Date startDate)

Sets the 100-year period 2-digit years will be interpreted as being in to begin on the date the user specifies.

Parameters:

startDate - During parsing, two digit years will be placed in the range startDate to startDate + 100 years.

Since:

1.2

See Also:

get2DigitYearStart()

get2DigitYearStart

public Date get2DigitYearStart()

Returns the beginning date of the 100-year period 2-digit years are interpreted as being within.

Returns:

the start of the 100-year period into which two digit years are parsed

Since:

1.2

See Also:

set2DigitYearStart(java.util.Date)

format

public StringBuffer format(Date date,
                           StringBuffer toAppendTo,
                           FieldPosition pos)

Formats the given Date into a date/time string and appends the result to the given StringBuffer.

Specified by:

format in class DateFormat

Parameters:

date - the date-time value to be formatted into a date-time string.

toAppendTo - where the new date-time text is to be appended.

pos - the formatting position. On input: an alignment field, if desired. On output: the offsets of the alignment field.

Returns:

the formatted date-time string.

Throws:

NullPointerException - if the given date is null

format

private StringBuffer format(Date date,
                            StringBuffer toAppendTo,
                            Format.FieldDelegate delegate)

formatToCharacterIterator

public AttributedCharacterIterator formatToCharacterIterator(Object obj)

Formats an Object producing an AttributedCharacterIterator. You can use the returned AttributedCharacterIterator to build the resulting String, as well as to determine information about the resulting String.

Each attribute key of the AttributedCharacterIterator will be of type DateFormat.Field, with the corresponding attribute value being the same as the attribute key.

Overrides:

formatToCharacterIterator in class Format

Parameters:

obj - The object to format

Returns:

AttributedCharacterIterator describing the formatted value.

Throws:

NullPointerException - if obj is null.

IllegalArgumentException - if the Format cannot format the given object, or if the Format's pattern string is invalid.

Since:

1.4

subFormat

private void subFormat(int patternCharIndex,
                       int count,
                       Format.FieldDelegate delegate,
                       StringBuffer buffer)

Private member function that does the real date/time formatting.

zeroPaddingNumber

private final void zeroPaddingNumber(int value,
                                     int minDigits,
                                     int maxDigits,
                                     StringBuffer buffer)

Formats a number with the specified minimum and maximum number of digits.

parse

public Date parse(String text,
                  ParsePosition pos)

Parses text from a string to produce a Date.

The method attempts to parse text starting at the index given by pos. If parsing succeeds, then the index of pos 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 pos can be used to indicate the starting point for the next call to this method. If an error occurs, then the index of pos is not changed, the error index of pos is set to the index of the character where the error occurred, and null is returned.

Specified by:

parse in class DateFormat

Parameters:

text - A String, part of which should be parsed.

pos - A ParsePosition object with index and error index information as described above.

Returns:

A Date parsed from the string. In case of error, returns null.

Throws:

NullPointerException - if text or pos is null.

See Also:

DateFormat.setLenient(boolean)

matchString

private int matchString(String text,
                        int start,
                        int field,
                        String[] data)

Private code-size reduction function used by subParse.

Parameters:

text - the time text being parsed.

start - where to start parsing.

field - the date field being parsed.

data - the string array to parsed.

Returns:

the new start position if matching succeeded; a negative number indicating matching failure, otherwise.

matchZoneString

private int matchZoneString(String text,
                            int start,
                            int zoneIndex)

subParseZoneString

private int subParseZoneString(String text,
                               int start)

find time zone 'text' matched zoneStrings and set to internal calendar.

subParse

private int subParse(String text,
                     int start,
                     int patternCharIndex,
                     int count,
                     boolean obeyCount,
                     boolean[] ambiguousYear,
                     ParsePosition origPos)

Private member function that converts the parsed date strings into timeFields. Returns -start (for ParsePosition) if failed.

Parameters:

text - the time text to be parsed.

start - where to start parsing.

count - the count of a pattern character.

obeyCount - if true, then the next field directly abuts this one, and we should use the count to know when to stop parsing.

ambiguousYear - return parameter; upon return, if ambiguousYear[0] is true, then a two-digit year was parsed and may need to be readjusted.

origPos - origPos.errorIndex is used to return an error index at which a parse error occurred, if matching failure occurs.

Returns:

the new start position if matching succeeded; -1 indicating matching failure, otherwise. In case matching failure occurred, an error index is set to origPos.errorIndex.

translatePattern

private String translatePattern(String pattern,
                                String from,
                                String to)

Translates a pattern, mapping each character in the from string to the corresponding character in the to string.

Throws:

IllegalArgumentException - if the given pattern is invalid

toPattern

public String toPattern()

Returns a pattern string describing this date format.

Returns:

a pattern string describing this date format.

toLocalizedPattern

public String toLocalizedPattern()

Returns a localized pattern string describing this date format.

Returns:

a localized pattern string describing this date format.

applyPattern

public void applyPattern(String pattern)

Applies the given pattern string to this date format.

Parameters:

pattern - the new date and time pattern for this date format

Throws:

NullPointerException - if the given pattern is null

IllegalArgumentException - if the given pattern is invalid

applyLocalizedPattern

public void applyLocalizedPattern(String pattern)

Applies the given localized pattern string to this date format.

Parameters:

pattern - a String to be mapped to the new date and time format pattern for this format

Throws:

NullPointerException - if the given pattern is null

IllegalArgumentException - if the given pattern is invalid

getDateFormatSymbols

public DateFormatSymbols getDateFormatSymbols()

Gets a copy of the date and time format symbols of this date format.

Returns:

the date and time format symbols of this date format

See Also:

setDateFormatSymbols(java.text.DateFormatSymbols)

setDateFormatSymbols

public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)

Sets the date and time format symbols of this date format.

Parameters:

newFormatSymbols - the new date and time format symbols

Throws:

NullPointerException - if the given newFormatSymbols is null

See Also:

getDateFormatSymbols()

clone

public Object clone()

Creates a copy of this SimpleDateFormat. This also clones the format's date format symbols.

Overrides:

clone in class DateFormat

Returns:

a clone of this SimpleDateFormat

hashCode

public int hashCode()

Returns the hash code value for this SimpleDateFormat object.

Overrides:

hashCode in class DateFormat

Returns:

the hash code value for this SimpleDateFormat object.

equals

public boolean equals(Object obj)

Compares the given object with this SimpleDateFormat for equality.

Overrides:

equals in class DateFormat

Returns:

true if the given object is equal to this SimpleDateFormat

readObject

private void readObject(ObjectInputStream stream)
                 throws IOException,
                        ClassNotFoundException

After reading an object from the input stream, the format pattern in the object is verified.

Throws:

InvalidObjectException - if the pattern is invalid

IOException

ClassNotFoundException