Class SimpleDateFormat
- All Implemented Interfaces:
Serializable
,Cloneable
- Direct Known Subclasses:
ChineseDateFormat
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, all unquoted ASCII letters [A-Za-z] are reserved
as pattern letters representing calendar fields. SimpleDateFormat
supports
the date and time formatting algorithm and pattern letters defined by UTS#35
Unicode Locale Data Markup Language (LDML). The following pattern letters are
currently available (note that the actual values depend on CLDR and may change from the
examples shown here):
Field Sym. No. Example Description era G 1..3 AD Era - Replaced with the Era string for the current date. One to three letters for the abbreviated form, four letters for the long (wide) form, five for the narrow form. 4 Anno Domini 5 A year y 1..n 1996 Year. Normally the length specifies the padding, but for two letters it also specifies the maximum length. Example:
Year y yy yyy yyyy yyyyy AD 1 1 01 001 0001 00001 AD 12 12 12 012 0012 00012 AD 123 123 23 123 0123 00123 AD 1234 1234 34 1234 1234 01234 AD 12345 12345 45 12345 12345 12345 Y 1..n 1997 Year (in "Week of Year" based calendars). Normally the length specifies the padding, but for two letters it also specifies the maximum length. This year designation is used in ISO year-week calendar as defined by ISO 8601, but can be used in non-Gregorian based calendar systems where week date processing is desired. May not always be the same value as calendar year. u 1..n 4601 Extended year. This is a single number designating the year of this calendar system, encompassing all supra-year fields. For example, for the Julian calendar system, year numbers are positive, with an era of BCE or CE. An extended year value for the Julian calendar system assigns positive values to CE years and negative values to BCE years, with 1 BCE being year 0. U 1..3 甲子 Cyclic year name. Calendars such as the Chinese lunar calendar (and related calendars) and the Hindu calendars use 60-year cycles of year names. Use one through three letters for the abbreviated name, four for the full (wide) name, or five for the narrow name (currently the data only provides abbreviated names, which will be used for all requested name widths). If the calendar does not provide cyclic year name data, or if the year value to be formatted is out of the range of years for which cyclic name data is provided, then numeric formatting is used (behaves like 'y'). 4 (currently also 甲子) 5 (currently also 甲子) quarter Q 1..2 02 Quarter - Use one or two for the numerical quarter, three for the abbreviation, or four for the full (wide) name (five for the narrow name is not yet supported). 3 Q2 4 2nd quarter q 1..2 02 Stand-Alone Quarter - Use one or two for the numerical quarter, three for the abbreviation, or four for the full name (five for the narrow name is not yet supported). 3 Q2 4 2nd quarter month M 1..2 09 Month - Use one or two for the numerical month, three for the abbreviation, four for the full (wide) name, or five for the narrow name. With two ("MM"), the month number is zero-padded if necessary (e.g. "08"). 3 Sep 4 September 5 S L 1..2 09 Stand-Alone Month - Use one or two for the numerical month, three for the abbreviation, four for the full (wide) name, or 5 for the narrow name. With two ("LL"), the month number is zero-padded if necessary (e.g. "08"). 3 Sep 4 September 5 S week w 1..2 27 Week of Year. Use "w" to show the minimum number of digits, or "ww" to always show two digits (zero-padding if necessary, e.g. "08"). W 1 3 Week of Month day d 1..2 1 Date - Day of the month. Use "d" to show the minimum number of digits, or "dd" to always show two digits (zero-padding if necessary, e.g. "08"). D 1..3 345 Day of year F 1 2 Day of Week in Month. The example is for the 2nd Wed in July g 1..n 2451334 Modified Julian day. This is different from the conventional Julian day number in two regards. First, it demarcates days at local zone midnight, rather than noon GMT. Second, it is a local number; that is, it depends on the local time zone. It can be thought of as a single number that encompasses all the date-related fields. week
dayE 1..3 Tue Day of week - Use one through three letters for the short day, four for the full (wide) name, five for the narrow name, or six for the short name. 4 Tuesday 5 T 6 Tu e 1..2 2 Local day of week. Same as E except adds a numeric value that will depend on the local starting day of the week, using one or two letters. For this example, Monday is the first day of the week. 3 Tue 4 Tuesday 5 T 6 Tu c 1 2 Stand-Alone local day of week - Use one letter for the local numeric value (same as 'e'), three for the short day, four for the full (wide) name, five for the narrow name, or six for the short name. 3 Tue 4 Tuesday 5 T 6 Tu period a 1 AM AM or PM hour h 1..2 11 Hour [1-12]. When used in skeleton data or in a skeleton passed in an API for flexible data pattern generation, it should match the 12-hour-cycle format preferred by the locale (h or K); it should not match a 24-hour-cycle format (H or k). Use hh for zero padding. H 1..2 13 Hour [0-23]. When used in skeleton data or in a skeleton passed in an API for flexible data pattern generation, it should match the 24-hour-cycle format preferred by the locale (H or k); it should not match a 12-hour-cycle format (h or K). Use HH for zero padding. K 1..2 0 Hour [0-11]. When used in a skeleton, only matches K or h, see above. Use KK for zero padding. k 1..2 24 Hour [1-24]. When used in a skeleton, only matches k or H, see above. Use kk for zero padding. minute m 1..2 59 Minute. Use "m" to show the minimum number of digits, or "mm" to always show two digits (zero-padding if necessary, e.g. "08").. second s 1..2 12 Second. Use "s" to show the minimum number of digits, or "ss" to always show two digits (zero-padding if necessary, e.g. "08"). S 1..n 3450 Fractional Second - truncates (like other time fields) to the count of letters when formatting. Appends zeros if more than 3 letters specified. Truncates at three significant digits when parsing. (example shows display using pattern SSSS for seconds value 12.34567) A 1..n 69540000 Milliseconds in day. This field behaves exactly like a composite of all time-related fields, not including the zone fields. As such, it also reflects discontinuities of those fields on DST transition days. On a day of DST onset, it will jump forward. On a day of DST cessation, it will jump backward. This reflects the fact that is must be combined with the offset field to obtain a unique local time value. zone z 1..3 PDT The short specific non-location format. Where that is unavailable, falls back to the short localized GMT format ("O"). 4 Pacific Daylight Time The long specific non-location format. Where that is unavailable, falls back to the long localized GMT format ("OOOO"). Z 1..3 -0800 The ISO8601 basic format with hours, minutes and optional seconds fields. The format is equivalent to RFC 822 zone format (when optional seconds field is absent). This is equivalent to the "xxxx" specifier. 4 GMT-8:00 The long localized GMT format. This is equivalent to the "OOOO" specifier. 5 -08:00
-07:52:58The ISO8601 extended format with hours, minutes and optional seconds fields. The ISO8601 UTC indicator "Z" is used when local time offset is 0. This is equivalent to the "XXXXX" specifier. O 1 GMT-8 The short localized GMT format. 4 GMT-08:00 The long localized GMT format. v 1 PT The short generic non-location format. Where that is unavailable, falls back to the generic location format ("VVVV"), then the short localized GMT format as the final fallback. 4 Pacific Time The long generic non-location format. Where that is unavailable, falls back to generic location format ("VVVV"). V 1 uslax The short time zone ID. Where that is unavailable, the special short time zone ID unk (Unknown Zone) is used.
Note: This specifier was originally used for a variant of the short specific non-location format, but it was deprecated in the later version of the LDML specification. In CLDR 23/ICU 51, the definition of the specifier was changed to designate a short time zone ID.2 America/Los_Angeles The long time zone ID. 3 Los Angeles The exemplar city (location) for the time zone. Where that is unavailable, the localized exemplar city name for the special zone Etc/Unknown is used as the fallback (for example, "Unknown City"). 4 Los Angeles Time The generic location format. Where that is unavailable, falls back to the long localized GMT format ("OOOO"; Note: Fallback is only necessary with a GMT-style Time Zone ID, like Etc/GMT-830.)
This is especially useful when presenting possible timezone choices for user selection, since the naming is more uniform than the "v" format.X 1 -08
+0530
ZThe ISO8601 basic format with hours field and optional minutes field. The ISO8601 UTC indicator "Z" is used when local time offset is 0. 2 -0800
ZThe ISO8601 basic format with hours and minutes fields. The ISO8601 UTC indicator "Z" is used when local time offset is 0. 3 -08:00
ZThe ISO8601 extended format with hours and minutes fields. The ISO8601 UTC indicator "Z" is used when local time offset is 0. 4 -0800
-075258
ZThe ISO8601 basic format with hours, minutes and optional seconds fields. (Note: The seconds field is not supported by the ISO8601 specification.) The ISO8601 UTC indicator "Z" is used when local time offset is 0. 5 -08:00
-07:52:58
ZThe ISO8601 extended format with hours, minutes and optional seconds fields. (Note: The seconds field is not supported by the ISO8601 specification.) The ISO8601 UTC indicator "Z" is used when local time offset is 0. x 1 -08
+0530The ISO8601 basic format with hours field and optional minutes field. 2 -0800 The ISO8601 basic format with hours and minutes fields. 3 -08:00 The ISO8601 extended format with hours and minutes fields. 4 -0800
-075258The ISO8601 basic format with hours, minutes and optional seconds fields. (Note: The seconds field is not supported by the ISO8601 specification.) 5 -08:00
-07:52:58The ISO8601 extended format with hours, minutes and optional seconds fields. (Note: The seconds field is not supported by the ISO8601 specification.)
Any characters in the pattern that are not in the ranges of ['a'..'z'] and ['A'..'Z'] will be treated as quoted text. For instance, characters like ':', '.', ' ', '#' and '@' will appear in the resulting time text even they are not embraced within single quotes.
A pattern containing any invalid pattern letter will result in a thrown exception during formatting or parsing.
Examples Using the US Locale:
Code Sample:Format Pattern Result -------------- ------- "yyyy.MM.dd G 'at' HH:mm:ss vvvv" ->> 1996.07.10 AD at 15:08:56 Pacific Time "EEE, MMM d, ''yy" ->> Wed, July 10, '96 "h:mm a" ->> 12:08 PM "hh 'o''clock' a, zzzz" ->> 12 o'clock PM, Pacific Daylight Time "K:mm a, vvv" ->> 0:00 PM, PT "yyyyy.MMMMM.dd GGG hh:mm aaa" ->> 01996.July.10 AD 12:08 PM
In the example, the time valueSimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, "PST"); pdt.setStartRule(Calendar.APRIL, 1, Calendar.SUNDAY, 2*60*60*1000); pdt.setEndRule(Calendar.OCTOBER, -1, Calendar.SUNDAY, 2*60*60*1000);
// Format the current time. SimpleDateFormat formatter = new SimpleDateFormat ("yyyy.MM.dd G 'at' hh:mm:ss a zzz"); Date currentTime_1 = new Date(); String dateString = formatter.format(currentTime_1);
// Parse the previous string back into a Date. ParsePosition pos = new ParsePosition(0); Date currentTime_2 = formatter.parse(dateString, pos);
currentTime_2
obtained from
parsing will be equal to currentTime_1
. However, they may not be
equal if the am/pm marker 'a' is left out from the format pattern while
the "hour in am/pm" pattern symbol is used. This information loss can
happen when formatting the time in PM.
When parsing a date string using the abbreviated year pattern ("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
UCharacter.isDigit(int)
, 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.
If the year pattern does not have exactly two 'y' characters, 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.
When numeric fields abut one another directly, with no intervening delimiter characters, they constitute a run of abutting numeric fields. Such runs are parsed specially. For example, the format "HHmmss" parses the input text "123456" to 12:34:56, parses the input text "12345" to 1:23:45, and fails to parse "1234". In other words, the leftmost field of the run is flexible, while the others keep a fixed width. If the parse fails anywhere in the run, then the leftmost field is shortened by one character, and the entire run is parsed again. This is repeated until either the parse succeeds or the leftmost field is one character in length. If the parse still fails at that point, the parse of the run fails.
For time zones that have no names, use strings GMT+hours:minutes or GMT-hours:minutes.
The calendar defines what is the first day of the week, the first week of the year, whether hours are zero based or not (0 vs 12 or 24), and the time zone. There is one common decimal format to handle all the numbers; the digit count is handled programmatically according to the pattern.
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.-
Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprivate static enum
Old ContextValue enum, preserved only to avoid deserialization errs from ICU 49.1.private static class
Nested classes/interfaces inherited from class com.ibm.icu.text.DateFormat
DateFormat.BooleanAttribute, DateFormat.Field, DateFormat.HourCycle
Nested classes/interfaces inherited from class com.ibm.icu.text.UFormat
UFormat.SpanField
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static ULocale
private static String
private static final int[]
private BreakIterator
BreakIterator to use for capitalization (will be cloned for actual use)(package private) static final int
(package private) static final UnicodeSet
private char[]
private static final int
private char[]
private long
private Date
We map dates with two-digit years into the century starting atdefaultCenturyStart
, which may be any date.private int
(package private) static boolean
private static final String
private DateFormatSymbols
The symbols used by this formatter for week names, month names, etc.private boolean
DateFormat pattern contains the Han year character 年=年, => non-numeric E Asian format.private boolean
DateFormat pattern contains the minute field.private boolean
DateFormat pattern contains the second field.private static final int
private static final int
private static final int
private ULocale
private static final long
Maximum range for detecting daylight offset of a time zone when parsed time zone string indicates it's daylight saving time, but the detected time zone does not observe daylight saving time at the parsed date.private static final int
private HashMap<String,
NumberFormat> The hash map used for number format overrides.private static final String
Format characters that indicate numeric fields always.private static final String
Format characters that indicate numeric fields when pattern length is up to 2.private String
The override string of this formatter.The hash map used for number format overrides.private String
The pattern string of this formatter.private static final boolean[]
private static final int[]
private static final int[]
private static final int[]
private static final DateFormat.Field[]
private static final int[]
private Object[]
private int
The version of the serialized data on the stream.private static final long
private static final String
private TimeZoneFormat
private boolean
If true, this object supports fast formatting using the subFormat variant that takes a StringBuffer.private boolean
Fields inherited from class com.ibm.icu.text.DateFormat
ABBR_GENERIC_TZ, ABBR_MONTH, ABBR_MONTH_DAY, ABBR_MONTH_WEEKDAY_DAY, ABBR_QUARTER, ABBR_SPECIFIC_TZ, ABBR_STANDALONE_MONTH, ABBR_UTC_TZ, ABBR_WEEKDAY, AM_PM_FIELD, AM_PM_MIDNIGHT_NOON_FIELD, calendar, DATE_FIELD, DATE_SKELETONS, DAY, DAY_OF_WEEK_FIELD, DAY_OF_WEEK_IN_MONTH_FIELD, DAY_OF_YEAR_FIELD, DEFAULT, DOW_LOCAL_FIELD, ERA_FIELD, EXTENDED_YEAR_FIELD, FIELD_COUNT, FLEXIBLE_DAY_PERIOD_FIELD, FRACTIONAL_SECOND_FIELD, FULL, GENERIC_TZ, HOUR, HOUR_GENERIC_TZ, HOUR_MINUTE, HOUR_MINUTE_GENERIC_TZ, HOUR_MINUTE_SECOND, HOUR_MINUTE_TZ, HOUR_OF_DAY0_FIELD, HOUR_OF_DAY1_FIELD, HOUR_TZ, HOUR0_FIELD, HOUR1_FIELD, HOUR24, HOUR24_MINUTE, HOUR24_MINUTE_SECOND, JP_ERA_2019_JA, JP_ERA_2019_NARROW, JP_ERA_2019_ROOT, JULIAN_DAY_FIELD, LOCATION_TZ, LONG, MEDIUM, MILLISECOND_FIELD, MILLISECONDS_IN_DAY_FIELD, MINUTE, MINUTE_FIELD, MINUTE_SECOND, MONTH, MONTH_DAY, MONTH_FIELD, MONTH_WEEKDAY_DAY, NONE, NUM_MONTH, NUM_MONTH_DAY, NUM_MONTH_WEEKDAY_DAY, numberFormat, QUARTER, QUARTER_FIELD, RELATED_YEAR, RELATIVE, RELATIVE_DEFAULT, RELATIVE_FULL, RELATIVE_LONG, RELATIVE_MEDIUM, RELATIVE_SHORT, SECOND, SECOND_FIELD, SHORT, SPECIFIC_TZ, STANDALONE_DAY_FIELD, STANDALONE_MONTH, STANDALONE_MONTH_FIELD, STANDALONE_QUARTER_FIELD, TIME_SEPARATOR, TIME_SKELETONS, TIMEZONE_FIELD, TIMEZONE_GENERIC_FIELD, TIMEZONE_ISO_FIELD, TIMEZONE_ISO_LOCAL_FIELD, TIMEZONE_LOCALIZED_GMT_OFFSET_FIELD, TIMEZONE_RFC_FIELD, TIMEZONE_SPECIAL_FIELD, WEEK_OF_MONTH_FIELD, WEEK_OF_YEAR_FIELD, WEEKDAY, YEAR, YEAR_ABBR_MONTH, YEAR_ABBR_MONTH_DAY, YEAR_ABBR_MONTH_WEEKDAY_DAY, YEAR_ABBR_QUARTER, YEAR_FIELD, YEAR_MONTH, YEAR_MONTH_DAY, YEAR_MONTH_WEEKDAY_DAY, YEAR_NAME_FIELD, YEAR_NUM_MONTH, YEAR_NUM_MONTH_DAY, YEAR_NUM_MONTH_WEEKDAY_DAY, YEAR_QUARTER, YEAR_WOY_FIELD, ZONE_SKELETONS
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Constructor Summary
ConstructorsModifierConstructorDescriptionConstructs a SimpleDateFormat using the default pattern for the defaultFORMAT
locale.SimpleDateFormat
(String pattern) Constructs a SimpleDateFormat using the given pattern in the defaultFORMAT
locale.SimpleDateFormat
(String pattern, DateFormatSymbols formatData) Constructs a SimpleDateFormat using the given pattern and locale-specific symbol data.private
SimpleDateFormat
(String pattern, DateFormatSymbols formatData, Calendar calendar, NumberFormat numberFormat, ULocale locale, boolean useFastFormat, String override) (package private)
SimpleDateFormat
(String pattern, DateFormatSymbols formatData, Calendar calendar, ULocale locale, boolean useFastFormat, String override) Package-private constructor that allows a subclass to specify whether it supports fast formatting.SimpleDateFormat
(String pattern, DateFormatSymbols formatData, ULocale loc) Deprecated.This API is ICU internal only.SimpleDateFormat
(String pattern, ULocale loc) Constructs a SimpleDateFormat using the given pattern and locale.SimpleDateFormat
(String pattern, String override, ULocale loc) Constructs a SimpleDateFormat using the given pattern , override and locale.SimpleDateFormat
(String pattern, Locale loc) Constructs a SimpleDateFormat using the given pattern and locale. -
Method Summary
Modifier and TypeMethodDescriptionprivate boolean
allowNumericFallback
(int patternCharIndex) return true if the pattern specified by patternCharIndex is one that allows numeric fallback regardless of actual pattern size.void
Apply the given localized pattern string to this date format.void
applyPattern
(String pat) Apply the given unlocalized pattern string to this date format.clone()
Overrides Cloneableprivate static int
countDigits
(String text, int start, int end) Counts number of digit code points in the specified text.private boolean
diffCalFieldValue
(Calendar fromCalendar, Calendar toCalendar, Object[] items, int i) check whether the i-th item in 2 calendar is in different value.boolean
Override equals.private void
fastZeroPaddingNumber
(StringBuffer buf, int value, int minDigits, int maxDigits) private StringBuffer
format
(Calendar cal, DisplayContext capitalizationContext, StringBuffer toAppendTo, FieldPosition pos, List<FieldPosition> attributes) format
(Calendar cal, StringBuffer toAppendTo, FieldPosition pos) Formats a date or time, which is the standard millis since January 1, 1970, 00:00:00 GMT.(package private) StringBuffer
format
(Calendar cal, StringBuffer toAppendTo, FieldPosition pos, List<FieldPosition> attributes) Internal formatting method that accepts an attributes list.Format the object to an attributed string, and return the corresponding iterator Overrides superclass method.Returns the beginning date of the 100-year period 2-digit years are interpreted as being within.Gets the date/time formatting data.private Date
private int
private static String
private static int
getIndexFromChar
(char ch) static SimpleDateFormat
getInstance
(Calendar.FormatConfiguration formatConfig) Deprecated.This API is ICU internal only.private static int
getLevelFromChar
(char ch) Map calendar field letter into calendar field level.(package private) ULocale
Get the locale of this simple date formatter.getNumberFormat
(char field) give the NumberFormat used for the field like 'y'(year) and 'M'(year)private Object[]
protected DateFormatSymbols
Method for subclasses to access the DateFormatSymbols.Gets the time zone formatter which this date/time formatter uses to format and parse a time zone.int
hashCode()
Override hashCode.private void
private void
initializeDefaultCenturyStart
(long baseTime) private void
initializeTimeZoneFormat
(boolean bForceUpdate) Private method lazily instantiate the TimeZoneFormat fieldprivate void
private void
final StringBuffer
intervalFormatByAlgorithm
(Calendar fromCalendar, Calendar toCalendar, StringBuffer appendTo, FieldPosition pos) Deprecated.This API is ICU internal only.(package private) boolean
isFieldUnitIgnored
(int field) Check whether the 'field' is smaller than all the fields covered in pattern, return true if it is.(package private) static boolean
isFieldUnitIgnored
(String pattern, int field) private static final boolean
isNumeric
(char formatChar, int count) Return true if the given format character, occurring count times, represents a numeric field.private static boolean
isSyntaxChar
(char ch) Tell if a character can be used to define a field in a format string.private boolean
lowerLevel
(Object[] items, int i, int level) check whether the i-th item's level is lower than the input 'level' It is supposed to be used only by CLDR survey tool.private int
matchAlphaMonthStrings
(String text, int start, String[] wideData, String[] shortData, Calendar cal) Deprecated.This API is ICU internal only.private int
matchDayPeriodString
(String text, int start, String[] data, int dataLength, Output<DayPeriodRules.DayPeriod> dayPeriod) Similar to matchQuarterString but customized for day periods.private int
matchLiteral
(String text, int pos, Object[] items, int itemIndex, boolean[] complete) Matches text (starting at pos) with patl.protected int
matchQuarterString
(String text, int start, int field, String[] data, Calendar cal) Attempt to match the text at a given position against an array of quarter strings.protected int
matchString
(String text, int start, int field, String[] data, Calendar cal) Attempt to match the text at a given position against an array of strings.private int
matchString
(String text, int start, int field, String[] data, String monthPattern, Calendar cal) Deprecated.This API is ICU internal only.void
parse
(String text, Calendar cal, ParsePosition parsePos) Overrides DateFormatprivate void
parseAmbiguousDatesAsAfter
(Date startDate) private Number
parseInt
(String text, int maxDigits, ParsePosition pos, boolean allowNegative, NumberFormat fmt) Parse an integer using numberFormat up to maxDigits.private Number
parseInt
(String text, ParsePosition pos, boolean allowNegative, NumberFormat fmt) Parse an integer using numberFormat.private void
protected DateFormat.Field
patternCharToDateFormatField
(char ch) Returns a DateFormat.Field constant associated with the specified format pattern character.private void
processOverrideString
(ULocale loc, String str) private void
readObject
(ObjectInputStream stream) Override readObject.private int
regionMatchesWithOptionalDot
(String text, int start, String data, int length) private static void
safeAppend
(String[] array, int value, StringBuffer appendTo) private static void
safeAppendWithMonthPattern
(String[] array, int value, StringBuffer appendTo, String monthPattern) 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
setContext
(DisplayContext context) Set a particular DisplayContext value in the formatter, such as CAPITALIZATION_FOR_STANDALONE.void
setDateFormatSymbols
(DateFormatSymbols newFormatSymbols) Allows you to set the date/time formatting data.void
setNumberFormat
(NumberFormat newNumberFormat) Overrides superclass method and This method also clears per field NumberFormat instances previously set bysetNumberFormat(String, NumberFormat)
void
setNumberFormat
(String fields, NumberFormat overrideNF) allow the user to set the NumberFormat for several fields It can be a single field like: "y"(year) or "M"(month) It can be several field combined together: "yMd"(year, month and date) Note: 1 symbol field is enough for multiple symbol fields (so "y" will override "yy", "yyy") If the field is not numeric, then override has no effect (like "MMM" will use abbreviation, not numerical field)void
setTimeZoneFormat
(TimeZoneFormat tzfmt) Allows you to set the time zone formatter.protected String
subFormat
(char ch, int count, int beginOffset, int fieldNum, DisplayContext capitalizationContext, FieldPosition pos, char patternCharToOutput, Calendar cal) Deprecated.This API is ICU internal only.protected String
subFormat
(char ch, int count, int beginOffset, FieldPosition pos, DateFormatSymbols fmtData, Calendar cal) Formats a single field, given its pattern character.protected void
subFormat
(StringBuffer buf, char ch, int count, int beginOffset, int fieldNum, DisplayContext capitalizationContext, FieldPosition pos, char patternCharToOutput, Calendar cal) Deprecated.This API is ICU internal only.protected int
subParse
(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal) Protected method that converts one field of the input string into a numeric field value incal
.private int
subParse
(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal, MessageFormat numericLeapMonthFormatter, Output<TimeZoneFormat.TimeType> tzTimeType) Overloading to provide default argument (null) for day period.private int
subParse
(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal, MessageFormat numericLeapMonthFormatter, Output<TimeZoneFormat.TimeType> tzTimeType, Output<DayPeriodRules.DayPeriod> dayPeriod) Deprecated.This API is ICU internal only.Return a localized pattern string describing this date format.Return a pattern string describing this date format.private String
translatePattern
(String pat, String from, String to) Translate a pattern, mapping each character in the from string to the corresponding character in the to string.private TimeZoneFormat
tzFormat()
Private method, returns non-null TimeZoneFormat.private void
writeObject
(ObjectOutputStream stream) Override writeObject.protected String
zeroPaddingNumber
(long value, int minDigits, int maxDigits) Formats a number with the specified minimum and maximum number of digits.protected void
zeroPaddingNumber
(NumberFormat nf, StringBuffer buf, int value, int minDigits, int maxDigits) Deprecated.This API is ICU internal only.Methods inherited from class com.ibm.icu.text.DateFormat
fixNumberFormatForDates, format, format, format, getAvailableLocales, getAvailableULocales, getBooleanAttribute, getCalendar, getContext, getDateInstance, getDateInstance, getDateInstance, getDateInstance, getDateInstance, getDateInstance, getDateInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getInstance, getInstance, getInstance, getInstance, getInstanceForSkeleton, getInstanceForSkeleton, getInstanceForSkeleton, getInstanceForSkeleton, getInstanceForSkeleton, getNumberFormat, getPatternInstance, getPatternInstance, getPatternInstance, getPatternInstance, getPatternInstance, getTimeInstance, getTimeInstance, getTimeInstance, getTimeInstance, getTimeInstance, getTimeInstance, getTimeInstance, getTimeZone, isCalendarLenient, isLenient, parse, parse, parseObject, setBooleanAttribute, setCalendar, setCalendarLenient, setLenient, setTimeZone
Methods inherited from class java.text.Format
format, parseObject
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Field Details
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serialVersionUID
private static final long serialVersionUID- See Also:
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currentSerialVersion
static final int currentSerialVersion- See Also:
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DelayedHebrewMonthCheck
static boolean DelayedHebrewMonthCheck -
CALENDAR_FIELD_TO_LEVEL
private static final int[] CALENDAR_FIELD_TO_LEVEL -
PATTERN_CHAR_TO_LEVEL
private static final int[] PATTERN_CHAR_TO_LEVEL -
PATTERN_CHAR_IS_SYNTAX
private static final boolean[] PATTERN_CHAR_IS_SYNTAX -
HEBREW_CAL_CUR_MILLENIUM_START_YEAR
private static final int HEBREW_CAL_CUR_MILLENIUM_START_YEAR- See Also:
-
HEBREW_CAL_CUR_MILLENIUM_END_YEAR
private static final int HEBREW_CAL_CUR_MILLENIUM_END_YEAR- See Also:
-
serialVersionOnStream
private int serialVersionOnStreamThe 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
. - 2 This version writes an additional int for
capitalizationSetting
.
serialVersionOnStream
is written. - 0 or not present on stream: JDK 1.1.3. This version
has no
-
pattern
The pattern string of this formatter. This is always a non-localized pattern. May not be null. See class documentation for details. -
override
The override string of this formatter. Used to override the numbering system for one or more fields. -
numberFormatters
The hash map used for number format overrides. -
overrideMap
The hash map used for number format overrides. -
formatData
The symbols used by this formatter for week names, month names, etc. May not be null.- See Also:
-
locale
-
defaultCenturyStart
We map dates with two-digit years into the century starting atdefaultCenturyStart
, which may be any date. May not be null.- Since:
- JDK1.1.4
-
defaultCenturyStartYear
private transient int defaultCenturyStartYear -
defaultCenturyBase
private transient long defaultCenturyBase -
millisPerHour
private static final int millisPerHour- See Also:
-
ISOSpecialEra
private static final int ISOSpecialEra- See Also:
-
SUPPRESS_NEGATIVE_PREFIX
- See Also:
-
useFastFormat
private transient boolean useFastFormatIf true, this object supports fast formatting using the subFormat variant that takes a StringBuffer. -
tzFormat
-
capitalizationBrkIter
BreakIterator to use for capitalization (will be cloned for actual use) -
hasMinute
private transient boolean hasMinuteDateFormat pattern contains the minute field. -
hasSecond
private transient boolean hasSecondDateFormat pattern contains the second field. -
hasHanYearChar
private transient boolean hasHanYearCharDateFormat pattern contains the Han year character 年=年, => non-numeric E Asian format. -
cachedDefaultLocale
-
cachedDefaultPattern
-
FALLBACKPATTERN
- See Also:
-
PATTERN_CHAR_TO_INDEX
private static final int[] PATTERN_CHAR_TO_INDEX -
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_ATTRIBUTE
-
PARSED_PATTERN_CACHE
-
patternItems
-
useLocalZeroPaddingNumberFormat
private transient boolean useLocalZeroPaddingNumberFormat -
decDigits
private transient char[] decDigits -
decimalBuf
private transient char[] decimalBuf -
DECIMAL_BUF_SIZE
private static final int DECIMAL_BUF_SIZE- See Also:
-
NUMERIC_FORMAT_CHARS
Format characters that indicate numeric fields always.- See Also:
-
NUMERIC_FORMAT_CHARS2
Format characters that indicate numeric fields when pattern length is up to 2.- See Also:
-
MAX_DAYLIGHT_DETECTION_RANGE
private static final long MAX_DAYLIGHT_DETECTION_RANGEMaximum range for detecting daylight offset of a time zone when parsed time zone string indicates it's daylight saving time, but the detected time zone does not observe daylight saving time at the parsed date.- See Also:
-
DATE_PATTERN_TYPE
-
-
Constructor Details
-
SimpleDateFormat
public SimpleDateFormat()Constructs a SimpleDateFormat using the default pattern for the defaultFORMAT
locale. Note: Not all locales support SimpleDateFormat; for full generality, use the factory methods in the DateFormat class.- See Also:
-
SimpleDateFormat
Constructs a SimpleDateFormat using the given pattern in the defaultFORMAT
locale. Note: Not all locales support SimpleDateFormat; for full generality, use the factory methods in the DateFormat class.- See Also:
-
SimpleDateFormat
Constructs a SimpleDateFormat using the given pattern and locale. Note: Not all locales support SimpleDateFormat; for full generality, use the factory methods in the DateFormat class. -
SimpleDateFormat
Constructs a SimpleDateFormat using the given pattern and locale. Note: Not all locales support SimpleDateFormat; for full generality, use the factory methods in the DateFormat class. -
SimpleDateFormat
Constructs a SimpleDateFormat using the given pattern , override and locale.- Parameters:
pattern
- The pattern to be usedoverride
- The override string. A numbering system override string can take one of the following forms: 1). If just a numbering system name is specified, it applies to all numeric fields in the date format pattern. 2). To specify an alternate numbering system on a field by field basis, use the field letters from the pattern followed by an = sign, followed by the numbering system name. For example, to specify that just the year be formatted using Hebrew digits, use the override "y=hebr". Multiple overrides can be specified in a single string by separating them with a semi-colon. For example, the override string "m=thai;y=deva" would format using Thai digits for the month and Devanagari digits for the year.loc
- The locale to be used
-
SimpleDateFormat
Constructs a SimpleDateFormat using the given pattern and locale-specific symbol data. Warning: uses defaultFORMAT
locale for digits! -
SimpleDateFormat
Deprecated.This API is ICU internal only. -
SimpleDateFormat
SimpleDateFormat(String pattern, DateFormatSymbols formatData, Calendar calendar, ULocale locale, boolean useFastFormat, String override) Package-private constructor that allows a subclass to specify whether it supports fast formatting. TODO make this API public. -
SimpleDateFormat
private SimpleDateFormat(String pattern, DateFormatSymbols formatData, Calendar calendar, NumberFormat numberFormat, ULocale locale, boolean useFastFormat, String override)
-
-
Method Details
-
getLevelFromChar
private static int getLevelFromChar(char ch) Map calendar field letter into calendar field level. -
isSyntaxChar
private static boolean isSyntaxChar(char ch) Tell if a character can be used to define a field in a format string. -
getInstance
Deprecated.This API is ICU internal only.Creates an instance of SimpleDateFormat for the given format configuration- Parameters:
formatConfig
- the format configuration- Returns:
- A SimpleDateFormat instance
-
initialize
private void initialize() -
initializeTimeZoneFormat
private void initializeTimeZoneFormat(boolean bForceUpdate) Private method lazily instantiate the TimeZoneFormat field- Parameters:
bForceUpdate
- when true, check if tzFormat is synchronized with the current numberFormat and update its digits if necessary. When false, this check is skipped.
-
tzFormat
Private method, returns non-null TimeZoneFormat.- Returns:
- the TimeZoneFormat used by this formatter.
-
getDefaultPattern
-
parseAmbiguousDatesAsAfter
-
initializeDefaultCenturyStart
private void initializeDefaultCenturyStart(long baseTime) -
getDefaultCenturyStart
-
getDefaultCenturyStartYear
private int getDefaultCenturyStartYear() -
set2DigitYearStart
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 rangestartDate
tostartDate + 100 years
.
-
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
-
setContext
Set a particular DisplayContext value in the formatter, such as CAPITALIZATION_FOR_STANDALONE. Note: For getContext, see DateFormat.- Overrides:
setContext
in classDateFormat
- Parameters:
context
- The DisplayContext value to set.
-
format
Formats a date or time, which is the standard millis since January 1, 1970, 00:00:00 GMT.Example: using the US locale: "yyyy.MM.dd G 'at' HH:mm:ss zzz" ->> 1996.07.10 AD at 15:08:56 PDT
- Specified by:
format
in classDateFormat
- Parameters:
cal
- the calendar whose date-time value is to be formatted into a date-time stringtoAppendTo
- where the new date-time text is to be appendedpos
- the formatting position. On input: an alignment field, if desired. On output: the offsets of the alignment field.- Returns:
- the formatted date-time string.
- See Also:
-
format
StringBuffer format(Calendar cal, StringBuffer toAppendTo, FieldPosition pos, List<FieldPosition> attributes) Internal formatting method that accepts an attributes list. -
format
private StringBuffer format(Calendar cal, DisplayContext capitalizationContext, StringBuffer toAppendTo, FieldPosition pos, List<FieldPosition> attributes) -
getIndexFromChar
private static int getIndexFromChar(char ch) -
patternCharToDateFormatField
Returns a DateFormat.Field constant associated with the specified format pattern character.- Parameters:
ch
- The pattern character- Returns:
- DateFormat.Field associated with the pattern character
-
subFormat
protected String subFormat(char ch, int count, int beginOffset, FieldPosition pos, DateFormatSymbols fmtData, Calendar cal) throws IllegalArgumentException Formats a single field, given its pattern character. Subclasses may override this method in order to modify or add formatting capabilities.- Parameters:
ch
- the pattern charactercount
- the number of times ch is repeated in the patternbeginOffset
- the offset of the output string at the start of this field; used to set pos when appropriatepos
- receives the position of a field, when appropriatefmtData
- the symbols for this formatter- Throws:
IllegalArgumentException
-
subFormat
@Deprecated protected String subFormat(char ch, int count, int beginOffset, int fieldNum, DisplayContext capitalizationContext, FieldPosition pos, char patternCharToOutput, Calendar cal) Deprecated.This API is ICU internal only.Formats a single field. This is the version called internally; it adds fieldNum and capitalizationContext parameters. -
subFormat
@Deprecated protected void subFormat(StringBuffer buf, char ch, int count, int beginOffset, int fieldNum, DisplayContext capitalizationContext, FieldPosition pos, char patternCharToOutput, Calendar cal) Deprecated.This API is ICU internal only.Formats a single field; useFastFormat variant. Reuses a StringBuffer for results instead of creating a String on the heap for each call. NOTE We don't really need the beginOffset parameter, EXCEPT for the need to support the slow subFormat variant (above) which has to pass it in to us. -
safeAppend
-
safeAppendWithMonthPattern
private static void safeAppendWithMonthPattern(String[] array, int value, StringBuffer appendTo, String monthPattern) -
getPatternItems
-
zeroPaddingNumber
@Deprecated protected void zeroPaddingNumber(NumberFormat nf, StringBuffer buf, int value, int minDigits, int maxDigits) Deprecated.This API is ICU internal only.Internal high-speed method. Reuses a StringBuffer for results instead of creating a String on the heap for each call. -
setNumberFormat
Overrides superclass method and This method also clears per field NumberFormat instances previously set bysetNumberFormat(String, NumberFormat)
- Overrides:
setNumberFormat
in classDateFormat
- Parameters:
newNumberFormat
- the given new NumberFormat.
-
initLocalZeroPaddingNumberFormat
private void initLocalZeroPaddingNumberFormat() -
fastZeroPaddingNumber
-
zeroPaddingNumber
Formats a number with the specified minimum and maximum number of digits. -
isNumeric
private static final boolean isNumeric(char formatChar, int count) Return true if the given format character, occurring count times, represents a numeric field. -
parse
Overrides DateFormat- Specified by:
parse
in classDateFormat
- Parameters:
text
- The date/time string to be parsedcal
- The calendar set on input to the date and time to be used for missing values in the date/time string being parsed, and set on output to the parsed date/time. In general, this should be initialized before calling this method - either cleared or set to the current date, depending on desired behavior. If this parse fails, the calendar may still have been modified. When the calendar type is different from the internal calendar held by this DateFormat instance, calendar field values will be parsed based on the internal calendar initialized with the time and the time zone taken from this calendar, then the parse result (time in milliseconds and time zone) will be set back to this calendar.parsePos
- On input, the position at which to start parsing; on output, the position at which parsing terminated, or the start position if the parse failed.- See Also:
-
matchLiteral
Matches text (starting at pos) with patl. Returns the new pos, and sets complete[0] if it matched the entire text. Whitespace sequences are treated as singletons.If isLenient and if we fail to match the first time, some special hacks are put into place.
- we are between date and time fields, then one or more whitespace characters in the text are accepted instead.
- we are after a non-numeric field, and the text starts with a ".", we skip it.
-
matchAlphaMonthStrings
@Deprecated private int matchAlphaMonthStrings(String text, int start, String[] wideData, String[] shortData, Calendar cal) Deprecated.This API is ICU internal only. Does not handle monthPattern. field is always Calendar.MONTHAttempt to match the text at a given position against two arrays of month symbol strings. Since multiple strings in the array may match (for example, if the array contains "a", "ab", and "abc", all will match the input string "abcd") the longest match is returned. As a side effect, the given field ofcal
is set to the index of the best match, if there is one.- Parameters:
text
- the time text being parsed.start
- where to start parsing.wideData
- the string array of wide month symbolsshortData
- the string array of short month symbolscal
-- Returns:
- the new start position if matching succeeded; a negative
number indicating matching failure, otherwise. As a side effect,
sets the
cal
fieldfield
to the index of the best match, if matching succeeded.
-
matchString
Attempt to match the text at a given position against an array of strings. Since multiple strings in the array may match (for example, if the array contains "a", "ab", and "abc", all will match the input string "abcd") the longest match is returned. As a side effect, the given field ofcal
is set to the index of the best match, if there is one.- Parameters:
text
- the time text being parsed.start
- where to start parsing.field
- the date field being parsed.data
- the string array to parsed.cal
-- Returns:
- the new start position if matching succeeded; a negative
number indicating matching failure, otherwise. As a side effect,
sets the
cal
fieldfield
to the index of the best match, if matching succeeded.
-
matchString
@Deprecated private int matchString(String text, int start, int field, String[] data, String monthPattern, Calendar cal) Deprecated.This API is ICU internal only.Attempt to match the text at a given position against an array of strings. Since multiple strings in the array may match (for example, if the array contains "a", "ab", and "abc", all will match the input string "abcd") the longest match is returned. As a side effect, the given field ofcal
is set to the index of the best match, if there is one.- Parameters:
text
- the time text being parsed.start
- where to start parsing.field
- the date field being parsed.data
- the string array to parsed.monthPattern
- leap month pattern, or null if none.cal
-- Returns:
- the new start position if matching succeeded; a negative
number indicating matching failure, otherwise. As a side effect,
sets the
cal
fieldfield
to the index of the best match, if matching succeeded.
-
regionMatchesWithOptionalDot
-
matchQuarterString
Attempt to match the text at a given position against an array of quarter strings. Since multiple strings in the array may match (for example, if the array contains "a", "ab", and "abc", all will match the input string "abcd") the longest match is returned. As a side effect, the given field ofcal
is set to the index of the best match, if there is one.- 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. As a side effect,
sets the
cal
fieldfield
to the index of the best match, if matching succeeded.
-
matchDayPeriodString
private int matchDayPeriodString(String text, int start, String[] data, int dataLength, Output<DayPeriodRules.DayPeriod> dayPeriod) Similar to matchQuarterString but customized for day periods. -
subParse
protected int subParse(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal) Protected method that converts one field of the input string into a numeric field value incal
. Returns -start (for ParsePosition) if failed. Subclasses may override this method to modify or add parsing capabilities.- Parameters:
text
- the time text to be parsed.start
- where to start parsing.ch
- the pattern character for the date field text to be parsed.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.cal
-- Returns:
- the new start position if matching succeeded; a negative
number indicating matching failure, otherwise. As a side effect,
set the appropriate field of
cal
with the parsed value.
-
subParse
private int subParse(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal, MessageFormat numericLeapMonthFormatter, Output<TimeZoneFormat.TimeType> tzTimeType) Overloading to provide default argument (null) for day period. -
subParse
@Deprecated private int subParse(String text, int start, char ch, int count, boolean obeyCount, boolean allowNegative, boolean[] ambiguousYear, Calendar cal, MessageFormat numericLeapMonthFormatter, Output<TimeZoneFormat.TimeType> tzTimeType, Output<DayPeriodRules.DayPeriod> dayPeriod) Deprecated.This API is ICU internal only.Protected method that converts one field of the input string into a numeric field value incal
. Returns -start (for ParsePosition) if failed. Subclasses may override this method to modify or add parsing capabilities.- Parameters:
text
- the time text to be parsed.start
- where to start parsing.ch
- the pattern character for the date field text to be parsed.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.cal
-numericLeapMonthFormatter
- if non-null, used to parse numeric leap months.tzTimeType
- the type of parsed time zone - standard, daylight or unknown (output). This parameter can be null if caller does not need the information.- Returns:
- the new start position if matching succeeded; a negative
number indicating matching failure, otherwise. As a side effect,
set the appropriate field of
cal
with the parsed value.
-
allowNumericFallback
private boolean allowNumericFallback(int patternCharIndex) return true if the pattern specified by patternCharIndex is one that allows numeric fallback regardless of actual pattern size. -
parseInt
Parse an integer using numberFormat. This method is semantically const, but actually may modify fNumberFormat. -
parseInt
private Number parseInt(String text, int maxDigits, ParsePosition pos, boolean allowNegative, NumberFormat fmt) Parse an integer using numberFormat up to maxDigits. -
countDigits
Counts number of digit code points in the specified text.- Parameters:
text
- input textstart
- start index, inclusiveend
- end index, exclusive- Returns:
- number of digits found in the text in the specified range.
-
translatePattern
Translate a pattern, mapping each character in the from string to the corresponding character in the to string. -
toPattern
Return a pattern string describing this date format. -
toLocalizedPattern
Return a localized pattern string describing this date format.Note: This implementation depends on
DateFormatSymbols.getLocalPatternChars()
to get localized format pattern characters. ICU does not include localized pattern character data, therefore, unless user sets localized pattern characters manually, this method returns the same result astoPattern()
. -
applyPattern
Apply the given unlocalized pattern string to this date format. -
applyLocalizedPattern
Apply the given localized pattern string to this date format. -
getDateFormatSymbols
Gets the date/time formatting data.- Returns:
- a copy of the date-time formatting data associated with this date-time formatter.
-
setDateFormatSymbols
Allows you to set the date/time formatting data.- Parameters:
newFormatSymbols
- the new symbols
-
getSymbols
Method for subclasses to access the DateFormatSymbols. -
getTimeZoneFormat
Gets the time zone formatter which this date/time formatter uses to format and parse a time zone.- Returns:
- the time zone formatter which this date/time formatter uses.
-
setTimeZoneFormat
Allows you to set the time zone formatter.- Parameters:
tzfmt
- the new time zone formatter
-
clone
Overrides Cloneable- Overrides:
clone
in classDateFormat
-
hashCode
public int hashCode()Override hashCode. Generates the hash code for the SimpleDateFormat object- Overrides:
hashCode
in classDateFormat
-
equals
Override equals.- Overrides:
equals
in classDateFormat
-
writeObject
Override writeObject. See http://docs.oracle.com/javase/6/docs/api/java/io/ObjectOutputStream.html- Throws:
IOException
-
readObject
Override readObject. See http://docs.oracle.com/javase/6/docs/api/java/io/ObjectInputStream.html- Throws:
IOException
ClassNotFoundException
-
formatToCharacterIterator
Format the object to an attributed string, and return the corresponding iterator Overrides superclass method.- Overrides:
formatToCharacterIterator
in classFormat
- Parameters:
obj
- The object to format- Returns:
AttributedCharacterIterator
describing the formatted value.
-
getLocale
ULocale getLocale()Get the locale of this simple date formatter. It is package accessible. also used in DateIntervalFormat.- Returns:
- locale in this simple date formatter
-
isFieldUnitIgnored
boolean isFieldUnitIgnored(int field) Check whether the 'field' is smaller than all the fields covered in pattern, return true if it is. The sequence of calendar field, from large to small is: ERA, YEAR, MONTH, DATE, AM_PM, HOUR, MINUTE,...- Parameters:
field
- the calendar field need to check against- Returns:
- true if the 'field' is smaller than all the fields covered in pattern. false otherwise.
-
isFieldUnitIgnored
-
intervalFormatByAlgorithm
@Deprecated public final StringBuffer intervalFormatByAlgorithm(Calendar fromCalendar, Calendar toCalendar, StringBuffer appendTo, FieldPosition pos) throws IllegalArgumentException Deprecated.This API is ICU internal only.Format date interval by algorithm. It is supposed to be used only by CLDR survey tool.- Parameters:
fromCalendar
- calendar set to the from date in date interval to be formatted into date interval stringtoCalendar
- calendar set to the to date in date interval to be formatted into date interval stringappendTo
- Output parameter to receive result. Result is appended to existing contents.pos
- On input: an alignment field, if desired. On output: the offsets of the alignment field.- Returns:
- Reference to 'appendTo' parameter.
- Throws:
IllegalArgumentException
- when there is non-recognized pattern letter
-
diffCalFieldValue
private boolean diffCalFieldValue(Calendar fromCalendar, Calendar toCalendar, Object[] items, int i) throws IllegalArgumentException check whether the i-th item in 2 calendar is in different value. It is supposed to be used only by CLDR survey tool. It is used by intervalFormatByAlgorithm().- Parameters:
fromCalendar
- one calendartoCalendar
- the other calendaritems
- pattern itemsi
- the i-th item in pattern items- Returns:
- true is i-th item in 2 calendar is in different value, false otherwise.
- Throws:
IllegalArgumentException
- when there is non-recognized pattern letter
-
lowerLevel
check whether the i-th item's level is lower than the input 'level' It is supposed to be used only by CLDR survey tool. It is used by intervalFormatByAlgorithm().- Parameters:
items
- the pattern itemsi
- the i-th item in pattern itemslevel
- the level with which the i-th pattern item compared to- Returns:
- true if i-th pattern item is lower than 'level', false otherwise
- Throws:
IllegalArgumentException
- when there is non-recognized pattern letter
-
setNumberFormat
allow the user to set the NumberFormat for several fields It can be a single field like: "y"(year) or "M"(month) It can be several field combined together: "yMd"(year, month and date) Note: 1 symbol field is enough for multiple symbol fields (so "y" will override "yy", "yyy") If the field is not numeric, then override has no effect (like "MMM" will use abbreviation, not numerical field)- Parameters:
fields
- the fields to overrideoverrideNF
- the NumbeferFormat used- Throws:
IllegalArgumentException
- when the fields contain invalid field
-
getNumberFormat
give the NumberFormat used for the field like 'y'(year) and 'M'(year)- Parameters:
field
- the field the user wants- Returns:
- override NumberFormat used for the field
-
initNumberFormatters
-
processOverrideString
-
parsePattern
private void parsePattern()
-