Class MailDateFormat

All Implemented Interfaces:
Serializable, Cloneable

public class MailDateFormat extends SimpleDateFormat
Formats and parses date specification based on RFC 2822.

This class does not take pattern strings. 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-zone
 
The 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.

Since:
JavaMail 1.2
See Also:
  • Constructor Details

    • MailDateFormat

      public MailDateFormat()
  • Method Details

    • format

      public StringBuffer format(Date date, StringBuffer dateStrBuf, FieldPosition fieldPosition)
      Formats the given date in the format specified by RFC 2822 in the current TimeZone.
      Overrides:
      format in class SimpleDateFormat
      Parameters:
      date - the Date object
      dateStrBuf - the formatted string
      fieldPosition - the current field position
      Returns:
      StringBuffer the formatted String
      Since:
      JavaMail 1.2
    • parse

      public Date parse(String text, ParsePosition pos)
      Parses the given date in the format specified by RFC 2822 in the current TimeZone.
      Overrides:
      parse in class SimpleDateFormat
      Parameters:
      text - the formatted date to be parsed
      pos - the current parse position
      Returns:
      Date the parsed date in a Date object
      Since:
      JavaMail 1.2
    • setCalendar

      public void setCalendar(Calendar newCalendar)
      Don't allow setting the calendar
      Overrides:
      setCalendar in class DateFormat
    • setNumberFormat

      public void setNumberFormat(NumberFormat newNumberFormat)
      Don't allow setting the NumberFormat
      Overrides:
      setNumberFormat in class DateFormat