Calendar (Groovy JDK enhancements)

Methods Summary

Methods
Return type	Name and parameters
`Calendar`	`clearTime()` Clears the time portion of this Calendar instance; useful utility where it makes sense to compare month/day/year only portions of a Calendar.
`Calendar`	`copyWith(Map 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.
`void`	`downto(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.
`String`	`format(String pattern)` Shortcut for SimpleDateFormat to output a String representation of this calendar instance.
`int`	`getAt(int field)` Support the subscript operator for a Calendar.
`List`	`getAt(Collection fields)` Support the subscript operator for a Calendar with a collection of indices.
`ZoneId`	`getZoneId()` Returns the Time Zone of the Calendar as a java.time.ZoneId.
`ZoneOffset`	`getZoneOffset()` Returns the Time Zone offset of the Calendar as a ZoneOffset.
`int`	`minus(Calendar then)` Subtract another date from this one and return the number of days of the difference.
`Calendar`	`next()` Increment a Calendar by one day.
`Calendar`	`previous()` Decrement a Calendar by one day.
`void`	`putAt(int field, int value)` Support the subscript operator for mutating a Calendar.
`void`	`set(Map updates)` Support mutating a Calendar with a Map.
`DayOfWeek`	`toDayOfWeek()` Converts the Calendar to a corresponding DayOfWeek.
`Instant`	`toInstant()` Convenience method for converting a Calendar to a corresponding Instant.
`LocalDateTime`	`toLocalDateTime()` Converts the Calendar to a corresponding LocalDateTime.
`LocalTime`	`toLocalTime()` Converts the Calendar to a corresponding LocalTime.
`Month`	`toMonth()` Converts the Calendar to a corresponding Month.
`MonthDay`	`toMonthDay()` Converts the Calendar to a corresponding MonthDay.
`OffsetDateTime`	`toOffsetDateTime()` Converts the Calendar to a corresponding OffsetDateTime.
`OffsetTime`	`toOffsetTime()` Converts the Calendar to a corresponding OffsetTime.
`Year`	`toYear()` Converts the Calendar to a corresponding Year.
`YearMonth`	`toYearMonth()` Converts the Calendar to a corresponding YearMonth.
`ZonedDateTime`	`toZonedDateTime()` Converts the Calendar to a corresponding ZonedDateTime.
`Calendar`	`updated(Map updates)` Legacy alias for copyWith.
`void`	`upto(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.

Methods inherited from class java.lang.Object

addShutdownHook, any, any, asBoolean, asType, collect, collect, collect, dump, each, eachMatch, eachMatch, eachWithIndex, every, every, find, find, findAll, findAll, findIndexOf, findIndexOf, findIndexValues, findIndexValues, findLastIndexOf, findLastIndexOf, findResult, findResult, findResult, findResult, getAt, getMetaClass, getMetaPropertyValues, getProperties, grep, grep, hasProperty, identity, inject, inject, inspect, invokeMethod, is, isCase, isNotCase, iterator, metaClass, print, print, printf, printf, println, println, println, putAt, respondsTo, respondsTo, setMetaClass, split, sprintf, sprintf, stream, tap, toString, use, use, use, with, with, withCloseable, withStream, withTraits

Methods inherited from interface java.lang.Comparable

numberAwareCompareTo

- Methods Detail
  - public Calendar clearTime()
    
    Clears the time portion of this Calendar instance; useful utility where it makes sense to compare month/day/year only portions of a Calendar.
    
    Returns:
    
    the Calendar but with the time portion cleared
    
    Since:
    
    1.6.7
  - public Calendar copyWith(Map 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:
    
    updates - A Map of Calendar keys and values
    
    Returns:
    
    The newly created Calendar
    
    Since:
    
    2.2.0
    
    See Also:
    
    Calendar#set(int, int)
    
    Calendar#set(int, int, int, int, int, int)
    
    Calendar#set(java.util.Map)
  - public void downto(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:
    
    to - another Calendar to go down to
    
    closure - the closure to call
    
    Since:
    
    2.2
  - public String format(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(int, java.util.Locale) and pass the same Locale that was used for the Calendar.
    
    Parameters:
    
    pattern - format pattern
    
    Returns:
    
    String representation of this calendar with the given format.
    
    Since:
    
    1.6.0
    
    See Also:
    
    DateFormat#setTimeZone(java.util.TimeZone)
    
    SimpleDateFormat#format(java.util.Date)
    
    Date#format(String)
  - public int getAt(int field)
    
    Support the subscript operator for a Calendar.
    
    Parameters:
    
    field - a Calendar field, e.g. MONTH
    
    Returns:
    
    the value for the given field, e.g. FEBRUARY
    
    Since:
    
    1.7.3
    
    See Also:
    
    Calendar
  - public List getAt(Collection fields)
    
    Support the subscript operator for a Calendar with a collection of indices.
    
    Parameters:
    
    fields - a collection of Calendar fields, e.g. [YEAR, MONTH]
    
    Returns:
    
    the value for the given field, e.g. [2022, FEBRUARY]
    
    Since:
    
    4.0.5
    
    See Also:
    
    Calendar
  - public ZoneId getZoneId()
    
    Returns the Time Zone of the Calendar as a java.time.ZoneId.
    
    Returns:
    
    a ZoneId
    
    Since:
    
    2.5.0
  - public ZoneOffset getZoneOffset()
    
    Returns the Time Zone offset of the Calendar as a ZoneOffset.
    
    Returns:
    
    a ZoneOffset
    
    Since:
    
    2.5.0
  - public int minus(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:
    
    then - another Calendar
    
    Returns:
    
    number of days
    
    Since:
    
    1.6.0
  - public Calendar next()
    
    Increment a Calendar by one day.
    
    Returns:
    
    a new Calendar set to the next day
    
    Since:
    
    1.8.7
  - public Calendar previous()
    
    Decrement a Calendar by one day.
    
    Returns:
    
    a new Calendar set to the previous day
    
    Since:
    
    1.8.7
  - public void putAt(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:
    
    field - A Calendar field, e.g. MONTH
    
    value - The value for the given field, e.g. FEBRUARY
    
    Since:
    
    1.7.3
    
    See Also:
    
    Calendar#set(int, int)
  - public void set(Map 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:
    
    updates - A Map of Calendar keys and values
    
    Since:
    
    1.7.3
    
    See Also:
    
    Calendar#set(int, int)
    
    Calendar#set(int, int, int, int, int, int)
  - public DayOfWeek toDayOfWeek()
    
    Converts the Calendar to a corresponding DayOfWeek. If the Calendar has a different time zone than the system default, the DayOfWeek will be adjusted into the default time zone.
    
    Returns:
    
    a DayOfWeek
    
    Since:
    
    2.5.0
  - public Instant toInstant()
    
    Convenience method for converting a Calendar to a corresponding Instant.
    
    Returns:
    
    an Instant
    
    Since:
    
    2.5.0
  - public LocalDateTime toLocalDateTime()
    
    Converts the Calendar to a corresponding LocalDateTime. If the Calendar has a different time zone than the system default, the LocalDateTime will be adjusted into the default time zone.
    
    Returns:
    
    a LocalDateTime
    
    Since:
    
    2.5.0
  - public LocalTime toLocalTime()
    
    Converts the Calendar to a corresponding LocalTime. If the Calendar has a different time zone than the system default, the LocalTime will be adjusted into the default time zone.
    
    Returns:
    
    a LocalTime
    
    Since:
    
    2.5.0
  - public Month toMonth()
    
    Converts the Calendar to a corresponding Month. If the Calendar has a different time zone than the system default, the Month will be adjusted into the default time zone.
    
    Returns:
    
    a Month
    
    Since:
    
    2.5.0
  - public MonthDay toMonthDay()
    
    Converts the Calendar to a corresponding MonthDay. If the Calendar has a different time zone than the system default, the MonthDay will be adjusted into the default time zone.
    
    Returns:
    
    a MonthDay
    
    Since:
    
    2.5.0
  - public OffsetDateTime toOffsetDateTime()
    
    Converts the Calendar to a corresponding OffsetDateTime.
    
    Returns:
    
    an OffsetDateTime
    
    Since:
    
    2.5.0
  - public OffsetTime toOffsetTime()
    
    Converts the Calendar to a corresponding OffsetTime.
    
    Returns:
    
    an OffsetTime
    
    Since:
    
    2.5.0
  - public Year toYear()
    
    Converts the Calendar to a corresponding Year. If the Calendar has a different time zone than the system default, the Year will be adjusted into the default time zone.
    
    Returns:
    
    a Year
    
    Since:
    
    2.5.0
  - public YearMonth toYearMonth()
    
    Converts the Calendar to a corresponding YearMonth. If the Calendar has a different time zone than the system default, the YearMonth will be adjusted into the default time zone.
    
    Returns:
    
    a YearMonth
    
    Since:
    
    2.5.0
  - public ZonedDateTime toZonedDateTime()
    
    Converts the Calendar to a corresponding ZonedDateTime.
    Note that GregorianCalendar has a GregorianCalendar#toZonedDateTime method, which is commonly the specific type of Calendar in use.
    
    Returns:
    
    a ZonedDateTime
    
    Since:
    
    2.5.0
  - public Calendar updated(Map updates)
    
    Legacy alias for copyWith. Will be deprecated and removed in future versions of Groovy.
    
    Parameters:
    
    Since:
    
    1.7.3
    
    See Also:
    
    Calendar#copyWith(java.util.Map)
  - public void upto(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:
    
    to - another Calendar to go up to
    
    closure - the closure to call
    
    Since:
    
    2.2

Class Calendar

Methods Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Comparable

Methods Detail

public Calendar clearTime()

public Calendar copyWith(Map updates)

public void downto(Calendar to, Closure closure)

public String format(String pattern)

public int getAt(int field)

public List getAt(Collection fields)

public ZoneId getZoneId()

public ZoneOffset getZoneOffset()

public int minus(Calendar then)

public Calendar next()

public Calendar previous()

public void putAt(int field, int value)

public void set(Map updates)

public DayOfWeek toDayOfWeek()

public Instant toInstant()

public LocalDateTime toLocalDateTime()

public LocalTime toLocalTime()

public Month toMonth()

public MonthDay toMonthDay()

public OffsetDateTime toOffsetDateTime()

public OffsetTime toOffsetTime()

public Year toYear()

public YearMonth toYearMonth()

public ZonedDateTime toZonedDateTime()

public Calendar updated(Map updates)

public void upto(Calendar to, Closure closure)

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