Method Detail

• public static Date clearTime(Date self)

  Clears the time portion of this Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.

  Parameters:

  self - a Date

  Returns:

  the Date but with the time portion cleared

  Since:

  1.6.7

• public static Date clearTime(Date self)

  Clears the time portion of this java.sql.Date instance; useful utility where it makes sense to compare month/day/year only portions of a Date.

  Parameters:

  self - a java.sql.Date

  Returns:

  the java.sql.Date but with the time portion cleared

  Since:

  1.6.7

• public static Calendar clearTime(Calendar self)

  Clears the time portion of this Calendar instance; useful utility where it makes sense to compare month/day/year only portions of a Calendar.

  Parameters:

  self - a Calendar

  Returns:

  the Calendar but with the time portion cleared

  Since:

  1.6.7

• public static Calendar copyWith(Calendar self, Map<Object, Integer> updates)

  Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.

  Example usage:

   import static java.util.Calendar.YEAR
   def now = Calendar.instance
   def nextYear = now[YEAR] + 1
   def oneYearFromNow = now.copyWith(year: nextYear)
   println now.time
   println oneYearFromNow.time
   

  Parameters:

  self - A Calendar

  updates - A Map of Calendar keys and values

  Returns:

  The newly created Calendar

  See Also:

  Calendar.set

  Calendar.set

  set(java.util.Calendar, java.util.Map)

  Since:

  2.2.0

• public static Date copyWith(Date self, Map<Object, Integer> updates)

  Support creating a new Date having similar properties to an existing Date (which remains unaltered) but with some fields updated according to a Map of changes.

  Example usage:

   import static java.util.Calendar.YEAR
   def today = new Date()
   def nextYear = today[YEAR] + 1
   def oneYearFromNow = today.copyWith(year: nextYear)
   println today
   println oneYearFromNow
   

  Parameters:

  self - A Date

  updates - A Map of Calendar keys and values

  Returns:

  The newly created Date

  See Also:

  Calendar.set

  set(java.util.Date, java.util.Map)

  copyWith(java.util.Calendar, java.util.Map)

  Since:

  2.2.0

• public static void downto(Date self, Date to, Closure closure)

  Iterates from this date down to the given date, inclusive, decrementing by one day each time.

  Parameters:

  self - a Date

  to - another Date to go down to

  closure - the closure to call

  Since:

  2.2

• public static void downto(Calendar self, Calendar to, Closure closure)

  Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.

  Parameters:

  self - a Calendar

  to - another Calendar to go down to

  closure - the closure to call

  Since:

  2.2

• public static String format(Date self, String format)

  Create a String representation of this date according to the given format pattern.

  For example, if the system timezone is GMT, new Date(0).format('MM/dd/yy') would return the string "01/01/70". See documentation for SimpleDateFormat for format pattern use.

  Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

  Parameters:

  self - a Date

  format - the format pattern to use according to SimpleDateFormat

  Returns:

  a string representation of this date.

  See Also:

  SimpleDateFormat

  Since:

  1.5.7

• public static String format(Date self, String format, TimeZone tz)

  Create a String representation of this date according to the given format pattern and timezone.

  For example: def d = new Date(0) def tz = TimeZone.getTimeZone('GMT') println d.format('dd/MMM/yyyy', tz) would return the string "01/Jan/1970". See documentation for SimpleDateFormat for format pattern use.

  Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

  Parameters:

  self - a Date

  format - the format pattern to use according to SimpleDateFormat

  tz - the TimeZone to use

  Returns:

  a string representation of this date.

  See Also:

  SimpleDateFormat

  Since:

  1.8.3

• public static String format(Calendar self, String pattern)

  Shortcut for SimpleDateFormat to output a String representation of this calendar instance. This method respects the Calendar's assigned TimeZone, whereas calling cal.time.format('HH:mm:ss') would use the system timezone.

  Note that Calendar equivalents of date.getDateString() and variants do not exist because those methods are Locale-dependent. Although a Calendar may be assigned a Locale, that information is lost and therefore cannot be used to control the default date/time formats provided by these methods. Instead, the system Locale would always be used. The alternative is to simply call DateFormat.getDateInstance and pass the same Locale that was used for the Calendar.

  Parameters:

  self - this calendar

  pattern - format pattern

  Returns:

  String representation of this calendar with the given format.

  See Also:

  DateFormat.setTimeZone

  SimpleDateFormat.format

  format(java.util.Date, String)

  Since:

  1.6.0

• public static int getAt(Date self, int field)

  Support the subscript operator for a Date.

  Parameters:

  self - a Date

  field - a Calendar field, e.g. MONTH

  Returns:

  the value for the given field, e.g. FEBRUARY

  See Also:

  Calendar

  Since:

  1.5.5

• public static List<Integer> getAt(Date self, Collection fields)

  Support the subscript operator for a Date with a collection of indices.

  Parameters:

  self - a Date

  fields - a collection of Calendar fields, e.g. [YEAR, MONTH]

  Returns:

  the value for the given field, e.g. [2022, FEBRUARY]

  See Also:

  Calendar

  Since:

  4.0.5

• public static int getAt(Calendar self, int field)

  Support the subscript operator for a Calendar.

  Parameters:

  self - a Calendar

  field - a Calendar field, e.g. MONTH

  Returns:

  the value for the given field, e.g. FEBRUARY

  See Also:

  Calendar

  Since:

  1.7.3

• public static List<Integer> getAt(Calendar self, Collection fields)

  Support the subscript operator for a Calendar with a collection of indices.

  Parameters:

  self - a Calendar

  fields - a collection of Calendar fields, e.g. [YEAR, MONTH]

  Returns:

  the value for the given field, e.g. [2022, FEBRUARY]

  See Also:

  Calendar

  Since:

  4.0.5

• public static String getDateString(Date self)

  Return a string representation of the 'day' portion of this date according to the locale-specific DateFormat.SHORT default format. For an "en_UK" system locale, this would be dd/MM/yy.

  Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

  Parameters:

  self - a Date

  Returns:

  a string representation of this date

  See Also:

  DateFormat.getDateInstance

  DateFormat.SHORT

  Since:

  1.5.7

• public static String getDateTimeString(Date self)

  Return a string representation of the date and time portion of this Date instance, according to the locale-specific format used by DateFormat. This method uses the DateFormat.SHORT preset for the day portion and DateFormat.MEDIUM for the time portion of the output string.

  Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

  Parameters:

  self - a Date

  Returns:

  a string representation of this date and time

  See Also:

  DateFormat.getDateTimeInstance

  Since:

  1.5.7

• public static String getTimeString(Date self)

  Return a string representation of the time portion of this date according to the locale-specific DateFormat.MEDIUM default format. For an "en_UK" system locale, this would be HH:MM:ss.

  Note that a new DateFormat instance is created for every invocation of this method (for thread safety).

  Parameters:

  self - a Date

  Returns:

  a string representing the time portion of this date

  See Also:

  DateFormat.getTimeInstance

  DateFormat.MEDIUM

  Since:

  1.5.7

• public static Date minus(Date self, int days)

  Subtract a number of days from this date and returns the new date.

  Parameters:

  self - a Date

  days - the number of days to subtract

  Returns:

  the new date

  Since:

  1.0

• public static Date minus(Date self, int days)

  Subtract a number of days from this date and returns the new date.

  Parameters:

  self - a java.sql.Date

  days - the number of days to subtract

  Returns:

  the new date

  Since:

  1.0

• public static Timestamp minus(Timestamp self, int days)

  Subtract a number of days from this Timestamp and returns the new Timestamp object.

  Parameters:

  self - a Timestamp

  days - the number of days to subtract

  Returns:

  the new Timestamp

• public static int minus(Calendar self, Calendar then)

  Subtract another date from this one and return the number of days of the difference.

  Date self = Date then + (Date self - Date then)

  IOW, if self is before then the result is a negative value.

  Parameters:

  self - a Calendar

  then - another Calendar

  Returns:

  number of days

  Since:

  1.6.0

• public static int minus(Date self, Date then)

  Subtract another Date from this one and return the number of days of the difference.

  Date self = Date then + (Date self - Date then)

  IOW, if self is before then the result is a negative value.

  Parameters:

  self - a Date

  then - another Date

  Returns:

  number of days

  Since:

  1.6.0

• public static Date next(Date self)

  Increment a Date by one day.

  Parameters:

  self - a Date

  Returns:

  the next days date

  Since:

  1.0

• public static Calendar next(Calendar self)

  Increment a Calendar by one day.

  Parameters:

  self - a Calendar

  Returns:

  a new Calendar set to the next day

  Since:

  1.8.7

• public static Date next(Date self)

  Increment a java.sql.Date by one day.

  Parameters:

  self - a java.sql.Date

  Returns:

  the next days date

  Since:

  1.0

• public static Date plus(Date self, int days)

  Add a number of days to this date and returns the new date.

  Parameters:

  self - a Date

  days - the number of days to increase

  Returns:

  the new date

  Since:

  1.0

• public static Date plus(Date self, int days)

  Add a number of days to this date and returns the new date.

  Parameters:

  self - a java.sql.Date

  days - the number of days to increase

  Returns:

  the new date

  Since:

  1.0

• public static Timestamp plus(Timestamp self, int days)

  Add number of days to this Timestamp and returns the new Timestamp object.

  Parameters:

  self - a Timestamp

  days - the number of days to increase

  Returns:

  the new Timestamp

• public static Calendar previous(Calendar self)

  Decrement a Calendar by one day.

  Parameters:

  self - a Calendar

  Returns:

  a new Calendar set to the previous day

  Since:

  1.8.7

• public static Date previous(Date self)

  Decrement a Date by one day.

  Parameters:

  self - a Date

  Returns:

  the previous days date

  Since:

  1.0

• public static Date previous(Date self)

  Decrement a java.sql.Date by one day.

  Parameters:

  self - a java.sql.Date

  Returns:

  the previous days date

  Since:

  1.0

• public static void putAt(Calendar self, int field, int value)

  Support the subscript operator for mutating a Calendar. Example usage:

   import static java.util.Calendar.*
   def cal = Calendar.instance
   cal[DAY_OF_WEEK] = MONDAY
   cal[MONTH] = MARCH
   println cal.time // A Monday in March
   

  Parameters:

  self - A Calendar

  field - A Calendar field, e.g. MONTH

  value - The value for the given field, e.g. FEBRUARY

  See Also:

  Calendar.set

  Since:

  1.7.3

• public static void putAt(Date self, int field, int value)

  Support the subscript operator for mutating a Date.

  Parameters:

  self - A Date

  field - A Calendar field, e.g. MONTH

  value - The value for the given field, e.g. FEBRUARY

  See Also:

  putAt(java.util.Calendar, int, int)

  Calendar.set

  Since:

  1.7.3

• public static void set(Calendar self, Map<Object, Integer> updates)

  Support mutating a Calendar with a Map.

  The map values are the normal values provided as the second parameter to java.util.Calendar#set(int, int). The keys can either be the normal fields values provided as the first parameter to that method or one of the following Strings:

  Calendar index values

  year	Calendar.YEAR
  month	Calendar.MONTH
  date	Calendar.DATE
  dayOfMonth	Calendar.DATE
  hourOfDay	Calendar.HOUR_OF_DAY
  minute	Calendar.MINUTE
  second	Calendar.SECOND

  Example usage:

   import static java.util.Calendar.*
   def cal = Calendar.instance
   def m = [:]
   m[YEAR] = 2010
   m[MONTH] = DECEMBER
   m[DATE] = 25
   cal.set(m)
   println cal.time // Christmas 2010
  
   cal.set(year:2011, month:DECEMBER, date:25)
   println cal.time // Christmas 2010
   

  Parameters:

  self - A Calendar

  updates - A Map of Calendar keys and values

  See Also:

  Calendar.set

  Calendar.set

  Since:

  1.7.3

• public static void set(Date self, Map<Object, Integer> updates)

  Support mutating a Date with a Map.

  The map values are the normal values provided as the second parameter to java.util.Calendar#set(int, int). The keys can either be the normal fields values provided as the first parameter to that method or one of the following Strings:

  Calendar index values

  year	Calendar.YEAR
  month	Calendar.MONTH
  date	Calendar.DATE
  dayOfMonth	Calendar.DATE
  hourOfDay	Calendar.HOUR_OF_DAY
  minute	Calendar.MINUTE
  second	Calendar.SECOND

  Example usage:

   import static java.util.Calendar.YEAR
   def date = new Date()
   def nextYear = date[YEAR] + 1
   date.set(year: nextYear)
   println date
   

  Parameters:

  self - A Date

  updates - A Map of Calendar keys and values

  See Also:

  Calendar.set

  set(java.util.Calendar, java.util.Map)

  Since:

  1.7.3

• public static Calendar toCalendar(Date self)

  Convert a Date to a Calendar.

  Parameters:

  self - a Date

  Returns:

  a Calendar corresponding to the given Date

  Since:

  1.7.6

• public static Calendar updated(Calendar self, Map<Object, Integer> updates)

  Legacy alias for copyWith. Will be deprecated and removed in future versions of Groovy.

  See Also:

  copyWith(java.util.Calendar, java.util.Map)

  Since:

  1.7.3

• public static Date updated(Date self, Map<Object, Integer> updates)

  Legacy alias for copyWith. Will be deprecated and removed in future versions of Groovy.

  See Also:

  copyWith(java.util.Date, java.util.Map)

  Since:

  1.7.3

• public static void upto(Date self, Date to, Closure closure)

  Iterates from this date up to the given date, inclusive, incrementing by one day each time.

  Parameters:

  self - a Date

  to - another Date to go up to

  closure - the closure to call

  Since:

  2.2

• public static void upto(Calendar self, Calendar to, Closure closure)

  Iterates from the date represented by this calendar up to the date represented by the given calendar, inclusive, incrementing by one day each time.

  Parameters:

  self - a Calendar

  to - another Calendar to go up to

  closure - the closure to call

  Since:

  2.2