public class MailDateFormat extends SimpleDateFormat
This class does not support methods that influence the format. It always formats the date based on the specification below.
3.3. Date and Time Specification
Date and time occur in several header fields. This section specifies the syntax for a full date and time specification. Though folding white space is permitted throughout the date-time specification, it is RECOMMENDED that a single space be used in each place that FWS appears (whether it is required or optional); some older implementations may not interpret other occurrences of folding white space correctly.
date-time = [ day-of-week "," ] date FWS time [CFWS] day-of-week = ([FWS] day-name) / obs-day-of-week day-name = "Mon" / "Tue" / "Wed" / "Thu" / "Fri" / "Sat" / "Sun" date = day month year year = 4*DIGIT / obs-year month = (FWS month-name FWS) / obs-month month-name = "Jan" / "Feb" / "Mar" / "Apr" / "May" / "Jun" / "Jul" / "Aug" / "Sep" / "Oct" / "Nov" / "Dec" day = ([FWS] 1*2DIGIT) / obs-day time = time-of-day FWS zone time-of-day = hour ":" minute [ ":" second ] hour = 2DIGIT / obs-hour minute = 2DIGIT / obs-minute second = 2DIGIT / obs-second zone = (( "+" / "-" ) 4DIGIT) / obs-zoneThe day is the numeric day of the month. The year is any numeric year 1900 or later.
The time-of-day specifies the number of hours, minutes, and optionally seconds since midnight of the date indicated.
The date and time-of-day SHOULD express local time.
The zone specifies the offset from Coordinated Universal Time (UTC, formerly referred to as "Greenwich Mean Time") that the date and time-of-day represent. The "+" or "-" indicates whether the time-of-day is ahead of (i.e., east of) or behind (i.e., west of) Universal Time. The first two digits indicate the number of hours difference from Universal Time, and the last two digits indicate the number of minutes difference from Universal Time. (Hence, +hhmm means +(hh * 60 + mm) minutes, and -hhmm means -(hh * 60 + mm) minutes). The form "+0000" SHOULD be used to indicate a time zone at Universal Time. Though "-0000" also indicates Universal Time, it is used to indicate that the time was generated on a system that may be in a local time zone other than Universal Time and therefore indicates that the date-time contains no information about the local time zone.
A date-time specification MUST be semantically valid. That is, the day-of-the-week (if included) MUST be the day implied by the date, the numeric day-of-month MUST be between 1 and the number of days allowed for the specified month (in the specified year), the time-of-day MUST be in the range 00:00:00 through 23:59:60 (the number of seconds allowing for a leap second; see [STD12]), and the zone MUST be within the range -9959 through +9959.
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.
DateFormat.Field
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 and Description |
---|
MailDateFormat()
Create a new date format for the RFC2822 specification with lenient
parsing.
|
Modifier and Type | Method and Description |
---|---|
void |
applyLocalizedPattern(String pattern)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates a specific pattern.
|
void |
applyPattern(String pattern)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates a specific pattern.
|
MailDateFormat |
clone()
Overrides Cloneable.
|
StringBuffer |
format(Date date,
StringBuffer dateStrBuf,
FieldPosition fieldPosition)
Formats the given date in the format specified by
RFC 2822 in the current TimeZone.
|
Date |
get2DigitYearStart()
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates another strategy for interpreting
2-digits years.
|
Date |
parse(String text,
ParsePosition pos)
Parses the given date in the format specified by
RFC 2822.
|
void |
set2DigitYearStart(Date startDate)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates another strategy for interpreting
2-digits years.
|
void |
setCalendar(Calendar newCalendar)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates a specific calendar.
|
void |
setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates specific date format symbols.
|
void |
setNumberFormat(NumberFormat newNumberFormat)
This method always throws an UnsupportedOperationException and should not
be used because RFC 2822 mandates a specific number format.
|
equals, formatToCharacterIterator, getDateFormatSymbols, hashCode, toLocalizedPattern, toPattern
format, format, getAvailableLocales, getCalendar, getDateInstance, getDateInstance, getDateInstance, getDateTimeInstance, getDateTimeInstance, getDateTimeInstance, getInstance, getNumberFormat, getTimeInstance, getTimeInstance, getTimeInstance, getTimeZone, isLenient, parse, parseObject, setLenient, setTimeZone
format, parseObject
public MailDateFormat()
public MailDateFormat clone()
clone
in class SimpleDateFormat
public StringBuffer format(Date date, StringBuffer dateStrBuf, FieldPosition fieldPosition)
format
in class SimpleDateFormat
date
- the Date objectdateStrBuf
- the formatted stringfieldPosition
- the current field positionpublic Date parse(String text, ParsePosition pos)
parse
in class SimpleDateFormat
text
- the formatted date to be parsedpos
- the current parse positionpublic void setCalendar(Calendar newCalendar)
setCalendar
in class DateFormat
UnsupportedOperationException
- if this method is invokedpublic void setNumberFormat(NumberFormat newNumberFormat)
setNumberFormat
in class DateFormat
UnsupportedOperationException
- if this method is invokedpublic void applyLocalizedPattern(String pattern)
applyLocalizedPattern
in class SimpleDateFormat
UnsupportedOperationException
- if this method is invokedpublic void applyPattern(String pattern)
applyPattern
in class SimpleDateFormat
UnsupportedOperationException
- if this method is invokedpublic Date get2DigitYearStart()
get2DigitYearStart
in class SimpleDateFormat
UnsupportedOperationException
- if this method is invokedpublic void set2DigitYearStart(Date startDate)
set2DigitYearStart
in class SimpleDateFormat
UnsupportedOperationException
- if this method is invokedpublic void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
setDateFormatSymbols
in class SimpleDateFormat
UnsupportedOperationException
- if this method is invokedCopyright © 2019 Eclipse Foundation. Use is subject to license terms.