Package ch.bailu.gtk.glib

Klasse DateTime

java.lang.Object
ch.bailu.gtk.type.Type
ch.bailu.gtk.type.Pointer
ch.bailu.gtk.type.Record
ch.bailu.gtk.glib.DateTime
Alle implementierten Schnittstellen:
PointerInterface
public class DateTime extends Record
`GDateTime` is a structure that combines a Gregorian date and time
into a single structure.

`GDateTime` provides many conversion and methods to manipulate dates and times.
Time precision is provided down to microseconds and the time can range
(proleptically) from 0001-01-01 00:00:00 to 9999-12-31 23:59:59.999999.
`GDateTime` follows POSIX time in the sense that it is oblivious to leap
seconds.

`GDateTime` is an immutable object; once it has been created it cannot
be modified further. All modifiers will create a new `GDateTime`.
Nearly all such functions can fail due to the date or time going out
of range, in which case %NULL will be returned.

`GDateTime` is reference counted: the reference count is increased by calling
[method@GLib.DateTime.ref] and decreased by calling [method@GLib.DateTime.unref].
When the reference count drops to 0, the resources allocated by the `GDateTime`
structure are released.

Many parts of the API may produce non-obvious results. As an
example, adding two months to January 31st will yield March 31st
whereas adding one month and then one month again will yield either
March 28th or March 29th. Also note that adding 24 hours is not
always the same as adding one day (since days containing daylight
savings time transitions are either 23 or 25 hours in length).

https://docs.gtk.org/glib/struct.DateTime.html

  • Konstruktordetails

    • DateTime

      public DateTime(PointerContainer pointer)

    • DateTime

      public DateTime(@Nonnull TimeZone tz, int year, int month, int day, int hour, int minute, double seconds)
      Creates a new #GDateTime corresponding to the given date and time in
      the time zone @tz.

      The @year must be between 1 and 9999, @month between 1 and 12 and @day
      between 1 and 28, 29, 30 or 31 depending on the month and the year.

      @hour must be between 0 and 23 and @minute must be between 0 and 59.

      @seconds must be at least 0.0 and must be strictly less than 60.0.
      It will be rounded down to the nearest microsecond.

      If the given time is not representable in the given time zone (for
      example, 02:30 on March 14th 2010 in Toronto, due to daylight savings
      time) then the time will be rounded up to the nearest existing time
      (in this case, 03:00). If this matters to you then you should verify
      the return value for containing the same as the numbers you gave.

      In the case that the given time is ambiguous in the given time zone
      (for example, 01:30 on November 7th 2010 in Toronto, due to daylight
      savings time) then the time falling within standard (ie:
      non-daylight) time is taken.

      It not considered a programmer error for the values to this function
      to be out of range, but in the case that they are, the function will
      return %NULL.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      tz - a #GTimeZone
      year - the year component of the date
      month - the month component of the date
      day - the day component of the date
      hour - the hour component of the date
      minute - the minute component of the date
      seconds - the number of seconds past the minute

  • Methodendetails

    • getClassHandler

      public static ClassHandler getClassHandler()

    • newFromIso8601DateTime

      public static DateTime newFromIso8601DateTime(@Nonnull Str text, @Nullable TimeZone default_tz)
      Creates a #GDateTime corresponding to the given
      [ISO 8601 formatted string](https://en.wikipedia.org/wiki/ISO_8601)
      @text. ISO 8601 strings of the form `<date><sep><time><tz>` are supported, with
      some extensions from [RFC 3339](https://tools.ietf.org/html/rfc3339) as
      mentioned below.

      Note that as #GDateTime "is oblivious to leap seconds", leap seconds information
      in an ISO-8601 string will be ignored, so a `23:59:60` time would be parsed as
      `23:59:59`.

      `<sep>` is the separator and can be either 'T', 't' or ' '. The latter two
      separators are an extension from
      [RFC 3339](https://tools.ietf.org/html/rfc3339#section-5.6).

      `<date>` is in the form:

      - `YYYY-MM-DD` - Year/month/day, e.g. 2016-08-24.
      - `YYYYMMDD` - Same as above without dividers.
      - `YYYY-DDD` - Ordinal day where DDD is from 001 to 366, e.g. 2016-237.
      - `YYYYDDD` - Same as above without dividers.
      - `YYYY-Www-D` - Week day where ww is from 01 to 52 and D from 1-7,
      e.g. 2016-W34-3.
      - `YYYYWwwD` - Same as above without dividers.

      `<time>` is in the form:

      - `hh:mm:ss(.sss)` - Hours, minutes, seconds (subseconds), e.g. 22:10:42.123.
      - `hhmmss(.sss)` - Same as above without dividers.

      `<tz>` is an optional timezone suffix of the form:

      - `Z` - UTC.
      - `+hh:mm` or `-hh:mm` - Offset from UTC in hours and minutes, e.g. +12:00.
      - `+hh` or `-hh` - Offset from UTC in hours, e.g. +12.

      If the timezone is not provided in @text it must be provided in @default_tz
      (this field is otherwise ignored).

      This call can fail (returning %NULL) if @text is not a valid ISO 8601
      formatted string.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      text - an ISO 8601 formatted time string.
      default_tz - a #GTimeZone to use if the text doesn't contain a timezone, or %NULL.
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromIso8601DateTime

      public static DateTime newFromIso8601DateTime(String text, @Nullable TimeZone default_tz)
      Creates a #GDateTime corresponding to the given
      [ISO 8601 formatted string](https://en.wikipedia.org/wiki/ISO_8601)
      @text. ISO 8601 strings of the form `<date><sep><time><tz>` are supported, with
      some extensions from [RFC 3339](https://tools.ietf.org/html/rfc3339) as
      mentioned below.

      Note that as #GDateTime "is oblivious to leap seconds", leap seconds information
      in an ISO-8601 string will be ignored, so a `23:59:60` time would be parsed as
      `23:59:59`.

      `<sep>` is the separator and can be either 'T', 't' or ' '. The latter two
      separators are an extension from
      [RFC 3339](https://tools.ietf.org/html/rfc3339#section-5.6).

      `<date>` is in the form:

      - `YYYY-MM-DD` - Year/month/day, e.g. 2016-08-24.
      - `YYYYMMDD` - Same as above without dividers.
      - `YYYY-DDD` - Ordinal day where DDD is from 001 to 366, e.g. 2016-237.
      - `YYYYDDD` - Same as above without dividers.
      - `YYYY-Www-D` - Week day where ww is from 01 to 52 and D from 1-7,
      e.g. 2016-W34-3.
      - `YYYYWwwD` - Same as above without dividers.

      `<time>` is in the form:

      - `hh:mm:ss(.sss)` - Hours, minutes, seconds (subseconds), e.g. 22:10:42.123.
      - `hhmmss(.sss)` - Same as above without dividers.

      `<tz>` is an optional timezone suffix of the form:

      - `Z` - UTC.
      - `+hh:mm` or `-hh:mm` - Offset from UTC in hours and minutes, e.g. +12:00.
      - `+hh` or `-hh` - Offset from UTC in hours, e.g. +12.

      If the timezone is not provided in @text it must be provided in @default_tz
      (this field is otherwise ignored).

      This call can fail (returning %NULL) if @text is not a valid ISO 8601
      formatted string.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      text - an ISO 8601 formatted time string.
      default_tz - a #GTimeZone to use if the text doesn't contain a timezone, or %NULL.
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromTimevalLocalDateTime

      @Deprecated public static DateTime newFromTimevalLocalDateTime(@Nonnull TimeVal tv)
      Veraltet.
      Creates a #GDateTime corresponding to the given #GTimeVal @tv in the
      local time zone.

      The time contained in a #GTimeVal is always stored in the form of
      seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the
      local time offset.

      This call can fail (returning %NULL) if @tv represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      tv - a #GTimeVal
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromTimevalUtcDateTime

      @Deprecated public static DateTime newFromTimevalUtcDateTime(@Nonnull TimeVal tv)
      Veraltet.
      Creates a #GDateTime corresponding to the given #GTimeVal @tv in UTC.

      The time contained in a #GTimeVal is always stored in the form of
      seconds elapsed since 1970-01-01 00:00:00 UTC.

      This call can fail (returning %NULL) if @tv represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      tv - a #GTimeVal
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromUnixLocalDateTime

      public static DateTime newFromUnixLocalDateTime(long t)
      Creates a #GDateTime corresponding to the given Unix time @t in the
      local time zone.

      Unix time is the number of seconds that have elapsed since 1970-01-01
      00:00:00 UTC, regardless of the local time offset.

      This call can fail (returning %NULL) if @t represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      t - the Unix time
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromUnixLocalUsecDateTime

      public static DateTime newFromUnixLocalUsecDateTime(long usecs)
      Creates a [struct@GLib.DateTime] corresponding to the given Unix time @t in the
      local time zone.

      Unix time is the number of microseconds that have elapsed since 1970-01-01
      00:00:00 UTC, regardless of the local time offset.

      This call can fail (returning `NULL`) if @t represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling [method@GLib.DateTime.unref]
      when you are done with it.
      Parameter:
      usecs - the Unix time in microseconds
      Gibt zurück:
      a new [struct@GLib.DateTime], or `NULL`

    • newFromUnixUtcDateTime

      public static DateTime newFromUnixUtcDateTime(long t)
      Creates a #GDateTime corresponding to the given Unix time @t in UTC.

      Unix time is the number of seconds that have elapsed since 1970-01-01
      00:00:00 UTC.

      This call can fail (returning %NULL) if @t represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      t - the Unix time
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newFromUnixUtcUsecDateTime

      public static DateTime newFromUnixUtcUsecDateTime(long usecs)
      Creates a [struct@GLib.DateTime] corresponding to the given Unix time @t in UTC.

      Unix time is the number of microseconds that have elapsed since 1970-01-01
      00:00:00 UTC.

      This call can fail (returning `NULL`) if @t represents a time outside
      of the supported range of #GDateTime.

      You should release the return value by calling [method@GLib.DateTime.unref]
      when you are done with it.
      Parameter:
      usecs - the Unix time in microseconds
      Gibt zurück:
      a new [struct@GLib.DateTime], or `NULL`

    • newLocalDateTime

      public static DateTime newLocalDateTime(int year, int month, int day, int hour, int minute, double seconds)
      Creates a new #GDateTime corresponding to the given date and time in
      the local time zone.

      This call is equivalent to calling g_date_time_new() with the time
      zone returned by g_time_zone_new_local().
      Parameter:
      year - the year component of the date
      month - the month component of the date
      day - the day component of the date
      hour - the hour component of the date
      minute - the minute component of the date
      seconds - the number of seconds past the minute
      Gibt zurück:
      a #GDateTime, or %NULL

    • newNowDateTime

      public static DateTime newNowDateTime(@Nonnull TimeZone tz)
      Creates a #GDateTime corresponding to this exact instant in the given
      time zone @tz. The time is as accurate as the system allows, to a
      maximum accuracy of 1 microsecond.

      This function will always succeed unless GLib is still being used after the
      year 9999.

      You should release the return value by calling g_date_time_unref()
      when you are done with it.
      Parameter:
      tz - a #GTimeZone
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newNowLocalDateTime

      public static DateTime newNowLocalDateTime()
      Creates a #GDateTime corresponding to this exact instant in the local
      time zone.

      This is equivalent to calling g_date_time_new_now() with the time
      zone returned by g_time_zone_new_local().
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newNowUtcDateTime

      public static DateTime newNowUtcDateTime()
      Creates a #GDateTime corresponding to this exact instant in UTC.

      This is equivalent to calling g_date_time_new_now() with the time
      zone returned by g_time_zone_new_utc().
      Gibt zurück:
      a new #GDateTime, or %NULL

    • newUtcDateTime

      public static DateTime newUtcDateTime(int year, int month, int day, int hour, int minute, double seconds)
      Creates a new #GDateTime corresponding to the given date and time in
      UTC.

      This call is equivalent to calling g_date_time_new() with the time
      zone returned by g_time_zone_new_utc().
      Parameter:
      year - the year component of the date
      month - the month component of the date
      day - the day component of the date
      hour - the hour component of the date
      minute - the minute component of the date
      seconds - the number of seconds past the minute
      Gibt zurück:
      a #GDateTime, or %NULL

    • addDays

      public DateTime addDays(int days)
      Creates a copy of @datetime and adds the specified number of days to the
      copy. Add negative values to subtract days.
      Parameter:
      days - the number of days
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addFull

      public DateTime addFull(int years, int months, int days, int hours, int minutes, double seconds)
      Creates a new #GDateTime adding the specified values to the current date and
      time in @datetime. Add negative values to subtract.
      Parameter:
      years - the number of years to add
      months - the number of months to add
      days - the number of days to add
      hours - the number of hours to add
      minutes - the number of minutes to add
      seconds - the number of seconds to add
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addHours

      public DateTime addHours(int hours)
      Creates a copy of @datetime and adds the specified number of hours.
      Add negative values to subtract hours.
      Parameter:
      hours - the number of hours to add
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addMinutes

      public DateTime addMinutes(int minutes)
      Creates a copy of @datetime adding the specified number of minutes.
      Add negative values to subtract minutes.
      Parameter:
      minutes - the number of minutes to add
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addMonths

      public DateTime addMonths(int months)
      Creates a copy of @datetime and adds the specified number of months to the
      copy. Add negative values to subtract months.

      The day of the month of the resulting #GDateTime is clamped to the number
      of days in the updated calendar month. For example, if adding 1 month to
      31st January 2018, the result would be 28th February 2018. In 2020 (a leap
      year), the result would be 29th February.
      Parameter:
      months - the number of months
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addSeconds

      public DateTime addSeconds(double seconds)
      Creates a copy of @datetime and adds the specified number of seconds.
      Add negative values to subtract seconds.
      Parameter:
      seconds - the number of seconds to add
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addWeeks

      public DateTime addWeeks(int weeks)
      Creates a copy of @datetime and adds the specified number of weeks to the
      copy. Add negative values to subtract weeks.
      Parameter:
      weeks - the number of weeks
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • addYears

      public DateTime addYears(int years)
      Creates a copy of @datetime and adds the specified number of years to the
      copy. Add negative values to subtract years.

      As with g_date_time_add_months(), if the resulting date would be 29th
      February on a non-leap year, the day will be clamped to 28th February.
      Parameter:
      years - the number of years
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • compare

      public int compare(@Nonnull Pointer dt2)
      A comparison function for #GDateTimes that is suitable
      as a #GCompareFunc. Both #GDateTimes must be non-%NULL.
      Parameter:
      dt2 - second #GDateTime to compare
      Gibt zurück:
      -1, 0 or 1 if @dt1 is less than, equal to or greater than @dt2.

    • equal

      public boolean equal(@Nonnull Pointer dt2)
      Checks to see if @dt1 and @dt2 are equal.

      Equal here means that they represent the same moment after converting
      them to the same time zone.
      Parameter:
      dt2 - a #GDateTime
      Gibt zurück:
      %TRUE if @dt1 and @dt2 are equal

    • format

      public Str format(@Nonnull Str format)
      Creates a newly allocated string representing the requested @format.

      The format strings understood by this function are a subset of the
      `strftime()` format language as specified by C99. The `%D`, `%U` and `%W`
      conversions are not supported, nor is the `E` modifier. The GNU
      extensions `%k`, `%l`, `%s` and `%P` are supported, however, as are the
      `0`, `_` and `-` modifiers. The Python extension `%f` is also supported.

      In contrast to `strftime()`, this function always produces a UTF-8
      string, regardless of the current locale. Note that the rendering of
      many formats is locale-dependent and may not match the `strftime()`
      output exactly.

      The following format specifiers are supported:

      - `%a`: the abbreviated weekday name according to the current locale
      - `%A`: the full weekday name according to the current locale
      - `%b`: the abbreviated month name according to the current locale
      - `%B`: the full month name according to the current locale
      - `%c`: the preferred date and time representation for the current locale
      - `%C`: the century number (year/100) as a 2-digit integer (00-99)
      - `%d`: the day of the month as a decimal number (range 01 to 31)
      - `%e`: the day of the month as a decimal number (range 1 to 31);
      single digits are preceded by a figure space (U+2007)
      - `%F`: equivalent to `%Y-%m-%d` (the ISO 8601 date format)
      - `%g`: the last two digits of the ISO 8601 week-based year as a
      decimal number (00-99). This works well with `%V` and `%u`.
      - `%G`: the ISO 8601 week-based year as a decimal number. This works
      well with `%V` and `%u`.
      - `%h`: equivalent to `%b`
      - `%H`: the hour as a decimal number using a 24-hour clock (range 00 to 23)
      - `%I`: the hour as a decimal number using a 12-hour clock (range 01 to 12)
      - `%j`: the day of the year as a decimal number (range 001 to 366)
      - `%k`: the hour (24-hour clock) as a decimal number (range 0 to 23);
      single digits are preceded by a figure space (U+2007)
      - `%l`: the hour (12-hour clock) as a decimal number (range 1 to 12);
      single digits are preceded by a figure space (U+2007)
      - `%m`: the month as a decimal number (range 01 to 12)
      - `%M`: the minute as a decimal number (range 00 to 59)
      - `%f`: the microsecond as a decimal number (range 000000 to 999999)
      - `%p`: either ‘AM’ or ‘PM’ according to the given time value, or the
      corresponding strings for the current locale. Noon is treated as
      ‘PM’ and midnight as ‘AM’. Use of this format specifier is discouraged, as
      many locales have no concept of AM/PM formatting. Use `%c` or `%X` instead.
      - `%P`: like `%p` but lowercase: ‘am’ or ‘pm’ or a corresponding string for
      the current locale. Use of this format specifier is discouraged, as
      many locales have no concept of AM/PM formatting. Use `%c` or `%X` instead.
      - `%r`: the time in a.m. or p.m. notation. Use of this format specifier is
      discouraged, as many locales have no concept of AM/PM formatting. Use `%c`
      or `%X` instead.
      - `%R`: the time in 24-hour notation (`%H:%M`)
      - `%s`: the number of seconds since the Epoch, that is, since 1970-01-01
      00:00:00 UTC
      - `%S`: the second as a decimal number (range 00 to 60)
      - `%t`: a tab character
      - `%T`: the time in 24-hour notation with seconds (`%H:%M:%S`)
      - `%u`: the ISO 8601 standard day of the week as a decimal, range 1 to 7,
      Monday being 1. This works well with `%G` and `%V`.
      - `%V`: the ISO 8601 standard week number of the current year as a decimal
      number, range 01 to 53, where week 1 is the first week that has at
      least 4 days in the new year. See g_date_time_get_week_of_year().
      This works well with `%G` and `%u`.
      - `%w`: the day of the week as a decimal, range 0 to 6, Sunday being 0.
      This is not the ISO 8601 standard format — use `%u` instead.
      - `%x`: the preferred date representation for the current locale without
      the time
      - `%X`: the preferred time representation for the current locale without
      the date
      - `%y`: the year as a decimal number without the century
      - `%Y`: the year as a decimal number including the century
      - `%z`: the time zone as an offset from UTC (`+hhmm`)
      - `%:z`: the time zone as an offset from UTC (`+hh:mm`).
      This is a gnulib `strftime()` extension. Since: 2.38
      - `%::z`: the time zone as an offset from UTC (`+hh:mm:ss`). This is a
      gnulib `strftime()` extension. Since: 2.38
      - `%:::z`: the time zone as an offset from UTC, with `:` to necessary
      precision (e.g., `-04`, `+05:30`). This is a gnulib `strftime()` extension. Since: 2.38
      - `%Z`: the time zone or name or abbreviation
      - `%%`: a literal `%` character

      Some conversion specifications can be modified by preceding the
      conversion specifier by one or more modifier characters.

      The following modifiers are supported for many of the numeric
      conversions:

      - `O`: Use alternative numeric symbols, if the current locale supports those.
      - `_`: Pad a numeric result with spaces. This overrides the default padding
      for the specifier.
      - `-`: Do not pad a numeric result. This overrides the default padding
      for the specifier.
      - `0`: Pad a numeric result with zeros. This overrides the default padding
      for the specifier.

      The following modifiers are supported for many of the alphabetic conversions:

      - `^`: Use upper case if possible. This is a gnulib `strftime()` extension.
      Since: 2.80
      - `#`: Use opposite case if possible. This is a gnulib `strftime()`
      extension. Since: 2.80

      Additionally, when `O` is used with `B`, `b`, or `h`, it produces the alternative
      form of a month name. The alternative form should be used when the month
      name is used without a day number (e.g., standalone). It is required in
      some languages (Baltic, Slavic, Greek, and more) due to their grammatical
      rules. For other languages there is no difference. `%OB` is a GNU and BSD
      `strftime()` extension expected to be added to the future POSIX specification,
      `%Ob` and `%Oh` are GNU `strftime()` extensions. Since: 2.56

      Since GLib 2.80, when `E` is used with `%c`, `%C`, `%x`, `%X`, `%y` or `%Y`,
      the date is formatted using an alternate era representation specific to the
      locale. This is typically used for the Thai solar calendar or Japanese era
      names, for example.

      - `%Ec`: the preferred date and time representation for the current locale,
      using the alternate era representation
      - `%EC`: the name of the era
      - `%Ex`: the preferred date representation for the current locale without
      the time, using the alternate era representation
      - `%EX`: the preferred time representation for the current locale without
      the date, using the alternate era representation
      - `%Ey`: the year since the beginning of the era denoted by the `%EC`
      specifier
      - `%EY`: the full alternative year representation
      Parameter:
      format - a valid UTF-8 string, containing the format for the #GDateTime
      Gibt zurück:
      a newly allocated string formatted to the requested format or %NULL in the case that there was an error (such as a format specifier not being supported in the current locale). The string should be freed with g_free().

    • format

      public Str format(String format)
      Creates a newly allocated string representing the requested @format.

      The format strings understood by this function are a subset of the
      `strftime()` format language as specified by C99. The `%D`, `%U` and `%W`
      conversions are not supported, nor is the `E` modifier. The GNU
      extensions `%k`, `%l`, `%s` and `%P` are supported, however, as are the
      `0`, `_` and `-` modifiers. The Python extension `%f` is also supported.

      In contrast to `strftime()`, this function always produces a UTF-8
      string, regardless of the current locale. Note that the rendering of
      many formats is locale-dependent and may not match the `strftime()`
      output exactly.

      The following format specifiers are supported:

      - `%a`: the abbreviated weekday name according to the current locale
      - `%A`: the full weekday name according to the current locale
      - `%b`: the abbreviated month name according to the current locale
      - `%B`: the full month name according to the current locale
      - `%c`: the preferred date and time representation for the current locale
      - `%C`: the century number (year/100) as a 2-digit integer (00-99)
      - `%d`: the day of the month as a decimal number (range 01 to 31)
      - `%e`: the day of the month as a decimal number (range 1 to 31);
      single digits are preceded by a figure space (U+2007)
      - `%F`: equivalent to `%Y-%m-%d` (the ISO 8601 date format)
      - `%g`: the last two digits of the ISO 8601 week-based year as a
      decimal number (00-99). This works well with `%V` and `%u`.
      - `%G`: the ISO 8601 week-based year as a decimal number. This works
      well with `%V` and `%u`.
      - `%h`: equivalent to `%b`
      - `%H`: the hour as a decimal number using a 24-hour clock (range 00 to 23)
      - `%I`: the hour as a decimal number using a 12-hour clock (range 01 to 12)
      - `%j`: the day of the year as a decimal number (range 001 to 366)
      - `%k`: the hour (24-hour clock) as a decimal number (range 0 to 23);
      single digits are preceded by a figure space (U+2007)
      - `%l`: the hour (12-hour clock) as a decimal number (range 1 to 12);
      single digits are preceded by a figure space (U+2007)
      - `%m`: the month as a decimal number (range 01 to 12)
      - `%M`: the minute as a decimal number (range 00 to 59)
      - `%f`: the microsecond as a decimal number (range 000000 to 999999)
      - `%p`: either ‘AM’ or ‘PM’ according to the given time value, or the
      corresponding strings for the current locale. Noon is treated as
      ‘PM’ and midnight as ‘AM’. Use of this format specifier is discouraged, as
      many locales have no concept of AM/PM formatting. Use `%c` or `%X` instead.
      - `%P`: like `%p` but lowercase: ‘am’ or ‘pm’ or a corresponding string for
      the current locale. Use of this format specifier is discouraged, as
      many locales have no concept of AM/PM formatting. Use `%c` or `%X` instead.
      - `%r`: the time in a.m. or p.m. notation. Use of this format specifier is
      discouraged, as many locales have no concept of AM/PM formatting. Use `%c`
      or `%X` instead.
      - `%R`: the time in 24-hour notation (`%H:%M`)
      - `%s`: the number of seconds since the Epoch, that is, since 1970-01-01
      00:00:00 UTC
      - `%S`: the second as a decimal number (range 00 to 60)
      - `%t`: a tab character
      - `%T`: the time in 24-hour notation with seconds (`%H:%M:%S`)
      - `%u`: the ISO 8601 standard day of the week as a decimal, range 1 to 7,
      Monday being 1. This works well with `%G` and `%V`.
      - `%V`: the ISO 8601 standard week number of the current year as a decimal
      number, range 01 to 53, where week 1 is the first week that has at
      least 4 days in the new year. See g_date_time_get_week_of_year().
      This works well with `%G` and `%u`.
      - `%w`: the day of the week as a decimal, range 0 to 6, Sunday being 0.
      This is not the ISO 8601 standard format — use `%u` instead.
      - `%x`: the preferred date representation for the current locale without
      the time
      - `%X`: the preferred time representation for the current locale without
      the date
      - `%y`: the year as a decimal number without the century
      - `%Y`: the year as a decimal number including the century
      - `%z`: the time zone as an offset from UTC (`+hhmm`)
      - `%:z`: the time zone as an offset from UTC (`+hh:mm`).
      This is a gnulib `strftime()` extension. Since: 2.38
      - `%::z`: the time zone as an offset from UTC (`+hh:mm:ss`). This is a
      gnulib `strftime()` extension. Since: 2.38
      - `%:::z`: the time zone as an offset from UTC, with `:` to necessary
      precision (e.g., `-04`, `+05:30`). This is a gnulib `strftime()` extension. Since: 2.38
      - `%Z`: the time zone or name or abbreviation
      - `%%`: a literal `%` character

      Some conversion specifications can be modified by preceding the
      conversion specifier by one or more modifier characters.

      The following modifiers are supported for many of the numeric
      conversions:

      - `O`: Use alternative numeric symbols, if the current locale supports those.
      - `_`: Pad a numeric result with spaces. This overrides the default padding
      for the specifier.
      - `-`: Do not pad a numeric result. This overrides the default padding
      for the specifier.
      - `0`: Pad a numeric result with zeros. This overrides the default padding
      for the specifier.

      The following modifiers are supported for many of the alphabetic conversions:

      - `^`: Use upper case if possible. This is a gnulib `strftime()` extension.
      Since: 2.80
      - `#`: Use opposite case if possible. This is a gnulib `strftime()`
      extension. Since: 2.80

      Additionally, when `O` is used with `B`, `b`, or `h`, it produces the alternative
      form of a month name. The alternative form should be used when the month
      name is used without a day number (e.g., standalone). It is required in
      some languages (Baltic, Slavic, Greek, and more) due to their grammatical
      rules. For other languages there is no difference. `%OB` is a GNU and BSD
      `strftime()` extension expected to be added to the future POSIX specification,
      `%Ob` and `%Oh` are GNU `strftime()` extensions. Since: 2.56

      Since GLib 2.80, when `E` is used with `%c`, `%C`, `%x`, `%X`, `%y` or `%Y`,
      the date is formatted using an alternate era representation specific to the
      locale. This is typically used for the Thai solar calendar or Japanese era
      names, for example.

      - `%Ec`: the preferred date and time representation for the current locale,
      using the alternate era representation
      - `%EC`: the name of the era
      - `%Ex`: the preferred date representation for the current locale without
      the time, using the alternate era representation
      - `%EX`: the preferred time representation for the current locale without
      the date, using the alternate era representation
      - `%Ey`: the year since the beginning of the era denoted by the `%EC`
      specifier
      - `%EY`: the full alternative year representation
      Parameter:
      format - a valid UTF-8 string, containing the format for the #GDateTime
      Gibt zurück:
      a newly allocated string formatted to the requested format or %NULL in the case that there was an error (such as a format specifier not being supported in the current locale). The string should be freed with g_free().

    • formatIso8601

      public Str formatIso8601()
      Format @datetime in [ISO 8601 format](https://en.wikipedia.org/wiki/ISO_8601),
      including the date, time and time zone, and return that as a UTF-8 encoded
      string.

      Since GLib 2.66, this will output to sub-second precision if needed.
      Gibt zurück:
      a newly allocated string formatted in ISO 8601 format or %NULL in the case that there was an error. The string should be freed with g_free().

    • getDayOfMonth

      public int getDayOfMonth()
      Retrieves the day of the month represented by @datetime in the gregorian
      calendar.
      Gibt zurück:
      the day of the month

    • getDayOfWeek

      public int getDayOfWeek()
      Retrieves the ISO 8601 day of the week on which @datetime falls (1 is
      Monday, 2 is Tuesday... 7 is Sunday).
      Gibt zurück:
      the day of the week

    • getDayOfYear

      public int getDayOfYear()
      Retrieves the day of the year represented by @datetime in the Gregorian
      calendar.
      Gibt zurück:
      the day of the year

    • getHour

      public int getHour()
      Retrieves the hour of the day represented by @datetime
      Gibt zurück:
      the hour of the day

    • getMicrosecond

      public int getMicrosecond()
      Retrieves the microsecond of the date represented by @datetime
      Gibt zurück:
      the microsecond of the second

    • getMinute

      public int getMinute()
      Retrieves the minute of the hour represented by @datetime
      Gibt zurück:
      the minute of the hour

    • getMonth

      public int getMonth()
      Retrieves the month of the year represented by @datetime in the Gregorian
      calendar.
      Gibt zurück:
      the month represented by @datetime

    • getSecond

      public int getSecond()
      Retrieves the second of the minute represented by @datetime
      Gibt zurück:
      the second represented by @datetime

    • getSeconds

      public double getSeconds()
      Retrieves the number of seconds since the start of the last minute,
      including the fractional part.
      Gibt zurück:
      the number of seconds

    • getTimezone

      public TimeZone getTimezone()
      Get the time zone for this @datetime.
      Gibt zurück:
      the time zone

    • getTimezoneAbbreviation

      public Str getTimezoneAbbreviation()
      Determines the time zone abbreviation to be used at the time and in
      the time zone of @datetime.

      For example, in Toronto this is currently "EST" during the winter
      months and "EDT" during the summer months when daylight savings
      time is in effect.
      Gibt zurück:
      the time zone abbreviation. The returned string is owned by the #GDateTime and it should not be modified or freed

    • getWeekNumberingYear

      public int getWeekNumberingYear()
      Returns the ISO 8601 week-numbering year in which the week containing
      @datetime falls.

      This function, taken together with g_date_time_get_week_of_year() and
      g_date_time_get_day_of_week() can be used to determine the full ISO
      week date on which @datetime falls.

      This is usually equal to the normal Gregorian year (as returned by
      g_date_time_get_year()), except as detailed below:

      For Thursday, the week-numbering year is always equal to the usual
      calendar year. For other days, the number is such that every day
      within a complete week (Monday to Sunday) is contained within the
      same week-numbering year.

      For Monday, Tuesday and Wednesday occurring near the end of the year,
      this may mean that the week-numbering year is one greater than the
      calendar year (so that these days have the same week-numbering year
      as the Thursday occurring early in the next year).

      For Friday, Saturday and Sunday occurring near the start of the year,
      this may mean that the week-numbering year is one less than the
      calendar year (so that these days have the same week-numbering year
      as the Thursday occurring late in the previous year).

      An equivalent description is that the week-numbering year is equal to
      the calendar year containing the majority of the days in the current
      week (Monday to Sunday).

      Note that January 1 0001 in the proleptic Gregorian calendar is a
      Monday, so this function never returns 0.
      Gibt zurück:
      the ISO 8601 week-numbering year for @datetime

    • getWeekOfYear

      public int getWeekOfYear()
      Returns the ISO 8601 week number for the week containing @datetime.
      The ISO 8601 week number is the same for every day of the week (from
      Moday through Sunday). That can produce some unusual results
      (described below).

      The first week of the year is week 1. This is the week that contains
      the first Thursday of the year. Equivalently, this is the first week
      that has more than 4 of its days falling within the calendar year.

      The value 0 is never returned by this function. Days contained
      within a year but occurring before the first ISO 8601 week of that
      year are considered as being contained in the last week of the
      previous year. Similarly, the final days of a calendar year may be
      considered as being part of the first ISO 8601 week of the next year
      if 4 or more days of that week are contained within the new year.
      Gibt zurück:
      the ISO 8601 week number for @datetime.

    • getYear

      public int getYear()
      Retrieves the year represented by @datetime in the Gregorian calendar.
      Gibt zurück:
      the year represented by @datetime

    • getYmd

      public void getYmd(@Nullable Int year, @Nullable Int month, @Nullable Int day)
      Retrieves the Gregorian day, month, and year of a given #GDateTime.
      Parameter:
      year - the return location for the gregorian year, or %NULL.
      month - the return location for the month of the year, or %NULL.
      day - the return location for the day of the month, or %NULL.

    • hash

      public int hash()
      Hashes @datetime into a #guint, suitable for use within #GHashTable.
      Gibt zurück:
      a #guint containing the hash

    • isDaylightSavings

      public boolean isDaylightSavings()
      Determines if daylight savings time is in effect at the time and in
      the time zone of @datetime.
      Gibt zurück:
      %TRUE if daylight savings time is in effect

    • ref

      public DateTime ref()
      Atomically increments the reference count of @datetime by one.
      Gibt zurück:
      the #GDateTime with the reference count increased

    • toLocal

      public DateTime toLocal()
      Creates a new #GDateTime corresponding to the same instant in time as
      @datetime, but in the local time zone.

      This call is equivalent to calling g_date_time_to_timezone() with the
      time zone returned by g_time_zone_new_local().
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • toTimeval

      @Deprecated public boolean toTimeval(@Nonnull TimeVal tv)
      Veraltet.
      Stores the instant in time that @datetime represents into @tv.

      The time contained in a #GTimeVal is always stored in the form of
      seconds elapsed since 1970-01-01 00:00:00 UTC, regardless of the time
      zone associated with @datetime.

      On systems where 'long' is 32bit (ie: all 32bit systems and all
      Windows systems), a #GTimeVal is incapable of storing the entire
      range of values that #GDateTime is capable of expressing. On those
      systems, this function returns %FALSE to indicate that the time is
      out of range.

      On systems where 'long' is 64bit, this function never fails.
      Parameter:
      tv - a #GTimeVal to modify
      Gibt zurück:
      %TRUE if successful, else %FALSE

    • toTimezone

      public DateTime toTimezone(@Nonnull TimeZone tz)
      Create a new #GDateTime corresponding to the same instant in time as
      @datetime, but in the time zone @tz.

      This call can fail in the case that the time goes out of bounds. For
      example, converting 0001-01-01 00:00:00 UTC to a time zone west of
      Greenwich will fail (due to the year 0 being out of range).
      Parameter:
      tz - the new #GTimeZone
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • toUnix

      public long toUnix()
      Gives the Unix time corresponding to @datetime, rounding down to the
      nearest second.

      Unix time is the number of seconds that have elapsed since 1970-01-01
      00:00:00 UTC, regardless of the time zone associated with @datetime.
      Gibt zurück:
      the Unix time corresponding to @datetime

    • toUnixUsec

      public long toUnixUsec()
      Gives the Unix time corresponding to @datetime, in microseconds.

      Unix time is the number of microseconds that have elapsed since 1970-01-01
      00:00:00 UTC, regardless of the time zone associated with @datetime.
      Gibt zurück:
      the Unix time corresponding to @datetime

    • toUtc

      public DateTime toUtc()
      Creates a new #GDateTime corresponding to the same instant in time as
      @datetime, but in UTC.

      This call is equivalent to calling g_date_time_to_timezone() with the
      time zone returned by g_time_zone_new_utc().
      Gibt zurück:
      the newly created #GDateTime which should be freed with g_date_time_unref(), or %NULL

    • unref

      public void unref()
      Atomically decrements the reference count of @datetime by one.

      When the reference count reaches zero, the resources allocated by
      @datetime are freed

    • getTypeID

      public static long getTypeID()

    • getParentTypeID

      public static long getParentTypeID()

    • getTypeSize

      public static TypeSystem.TypeSize getTypeSize()

    • getParentTypeSize

      public static TypeSystem.TypeSize getParentTypeSize()

    • getInstanceSize

      public static int getInstanceSize()