com.ibm.icu.util
Class GregorianCalendar

java.lang.Object
  com.ibm.icu.util.Calendar
      com.ibm.icu.util.GregorianCalendar

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Calendar>

Direct Known Subclasses:

BuddhistCalendar, JapaneseCalendar, TaiwanCalendar

public class GregorianCalendar
extends Calendar

[icu enhancement] ICU's replacement for java.util.GregorianCalendar. Methods, fields, and other functionality specific to ICU are labeled '[icu]'.

GregorianCalendar is a concrete subclass of Calendar and provides the standard calendar used by most of the world.

The standard (Gregorian) calendar has 2 eras, BC and AD.

This implementation handles a single discontinuity, which corresponds by default to the date the Gregorian calendar was instituted (October 15, 1582 in some countries, later in others). The cutover date may be changed by the caller by calling setGregorianChange().

Historically, in those countries which adopted the Gregorian calendar first, October 4, 1582 was thus followed by October 15, 1582. This calendar models this correctly. Before the Gregorian cutover, GregorianCalendar implements the Julian calendar. The only difference between the Gregorian and the Julian calendar is the leap year rule. The Julian calendar specifies leap years every four years, whereas the Gregorian calendar omits century years which are not divisible by 400.

GregorianCalendar implements proleptic Gregorian and Julian calendars. That is, dates are computed by extrapolating the current rules indefinitely far backward and forward in time. As a result, GregorianCalendar may be used for all years to generate meaningful and consistent results. However, dates obtained using GregorianCalendar are historically accurate only from March 1, 4 AD onward, when modern Julian calendar rules were adopted. Before this date, leap year rules were applied irregularly, and before 45 BC the Julian calendar did not even exist.

Prior to the institution of the Gregorian calendar, New Year's Day was March 25. To avoid confusion, this calendar always uses January 1. A manual adjustment may be made if desired for dates that are prior to the Gregorian changeover and which fall between January 1 and March 24.

Values calculated for the WEEK_OF_YEAR field range from 1 to 53. Week 1 for a year is the earliest seven day period starting on getFirstDayOfWeek() that contains at least getMinimalDaysInFirstWeek() days from that year. It thus depends on the values of getMinimalDaysInFirstWeek(), getFirstDayOfWeek(), and the day of the week of January 1. Weeks between week 1 of one year and week 1 of the following year are numbered sequentially from 2 to 52 or 53 (as needed).

For example, January 1, 1998 was a Thursday. If getFirstDayOfWeek() is MONDAY and getMinimalDaysInFirstWeek() is 4 (these are the values reflecting ISO 8601 and many national standards), then week 1 of 1998 starts on December 29, 1997, and ends on January 4, 1998. If, however, getFirstDayOfWeek() is SUNDAY, then week 1 of 1998 starts on January 4, 1998, and ends on January 10, 1998; the first three days of 1998 then are part of week 53 of 1997.

Values calculated for the WEEK_OF_MONTH field range from 0 or 1 to 4 or 5. Week 1 of a month (the days with WEEK_OF_MONTH = 1) is the earliest set of at least getMinimalDaysInFirstWeek() contiguous days in that month, ending on the day before getFirstDayOfWeek(). Unlike week 1 of a year, week 1 of a month may be shorter than 7 days, need not start on getFirstDayOfWeek(), and will not include days of the previous month. Days of a month before week 1 have a WEEK_OF_MONTH of 0.

For example, if getFirstDayOfWeek() is SUNDAY and getMinimalDaysInFirstWeek() is 4, then the first week of January 1998 is Sunday, January 4 through Saturday, January 10. These days have a WEEK_OF_MONTH of 1. Thursday, January 1 through Saturday, January 3 have a WEEK_OF_MONTH of 0. If getMinimalDaysInFirstWeek() is changed to 3, then January 1 through January 3 have a WEEK_OF_MONTH of 1.

Example:

 // get the supported ids for GMT-08:00 (Pacific Standard Time)
 String[] ids = TimeZone.getAvailableIDs(-8 * 60 * 60 * 1000);
 // if no ids were returned, something is wrong. get out.
 if (ids.length == 0)
     System.exit(0);

  // begin output
 System.out.println("Current Time");

 // create a Pacific Standard Time time zone
 SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids[0]);

 // set up rules for daylight savings time
 pdt.setStartRule(Calendar.MARCH, 2, Calendar.SUNDAY, 2 * 60 * 60 * 1000);
 pdt.setEndRule(Calendar.NOVEMBER, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000);

 // create a GregorianCalendar with the Pacific Daylight time zone
 // and the current date and time
 Calendar calendar = new GregorianCalendar(pdt);
 Date trialTime = new Date();
 calendar.setTime(trialTime);

 // print out a bunch of interesting things
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
                    + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
 System.out.println("DST_OFFSET: "
                    + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));

 System.out.println("Current Time, with hour reset to 3");
 calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
 calendar.set(Calendar.HOUR, 3);
 System.out.println("ERA: " + calendar.get(Calendar.ERA));
 System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
 System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
 System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
 System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
 System.out.println("DATE: " + calendar.get(Calendar.DATE));
 System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
 System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
 System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
 System.out.println("DAY_OF_WEEK_IN_MONTH: "
                    + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
 System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
 System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
 System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
 System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
 System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
 System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
 System.out.println("ZONE_OFFSET: "
        + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
 System.out.println("DST_OFFSET: "
        + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours

GregorianCalendar usually should be instantiated using Calendar.getInstance(ULocale) passing in a ULocale with the tag "@calendar=gregorian".

Author:

David Goldsmith, Mark Davis, Chen-Lieh Huang, Alan Liu

See Also:

Calendar, TimeZone, Serialized Form

Status:

Stable ICU 2.0.

Nested Class Summary

Nested classes/interfaces inherited from class com.ibm.icu.util.Calendar

Calendar.FormatConfiguration

Field Summary

static int	AD Value of the ERA field indicating the common era (Anno Domini), also known as CE.
static int	BC Value of the ERA field indicating the period before the common era (before Christ), also known as BCE.
protected boolean	invertGregorian Used by handleComputeJulianDay() and handleComputeMonthStart().
protected boolean	isGregorian Used by handleComputeJulianDay() and handleComputeMonthStart().

Fields inherited from class com.ibm.icu.util.Calendar

AM, AM_PM, APRIL, AUGUST, BASE_FIELD_COUNT, DATE, DAY_OF_MONTH, DAY_OF_WEEK, DAY_OF_WEEK_IN_MONTH, DAY_OF_YEAR, DECEMBER, DOW_LOCAL, DST_OFFSET, EPOCH_JULIAN_DAY, ERA, EXTENDED_YEAR, FEBRUARY, FRIDAY, GREATEST_MINIMUM, HOUR, HOUR_OF_DAY, INTERNALLY_SET, IS_LEAP_MONTH, JAN_1_1_JULIAN_DAY, JANUARY, JULIAN_DAY, JULY, JUNE, LEAST_MAXIMUM, MARCH, MAX_DATE, MAX_FIELD_COUNT, MAX_JULIAN, MAX_MILLIS, MAXIMUM, MAY, MILLISECOND, MILLISECONDS_IN_DAY, MIN_DATE, MIN_JULIAN, MIN_MILLIS, MINIMUM, MINIMUM_USER_STAMP, MINUTE, MONDAY, MONTH, NOVEMBER, OCTOBER, ONE_DAY, ONE_HOUR, ONE_MINUTE, ONE_SECOND, ONE_WEEK, PM, RESOLVE_REMAP, SATURDAY, SECOND, SEPTEMBER, SUNDAY, THURSDAY, TUESDAY, UNDECIMBER, UNSET, WEDNESDAY, WEEK_OF_MONTH, WEEK_OF_YEAR, WEEKDAY, WEEKEND, WEEKEND_CEASE, WEEKEND_ONSET, YEAR, YEAR_WOY, ZONE_OFFSET

Constructor Summary

GregorianCalendar()
Constructs a default GregorianCalendar using the current time in the default time zone with the default locale.

GregorianCalendar(int year, int month, int date)
Constructs a GregorianCalendar with the given date set in the default time zone with the default locale.

GregorianCalendar(int year, int month, int date, int hour, int minute)
Constructs a GregorianCalendar with the given date and time set for the default time zone with the default locale.

GregorianCalendar(int year, int month, int date, int hour, int minute, int second)
Constructs a GregorianCalendar with the given date and time set for the default time zone with the default locale.

GregorianCalendar(Locale aLocale)
Constructs a GregorianCalendar based on the current time in the default time zone with the given locale.

GregorianCalendar(TimeZone zone)
Constructs a GregorianCalendar based on the current time in the given time zone with the default locale.

GregorianCalendar(TimeZone zone, Locale aLocale)
[icu] Constructs a GregorianCalendar based on the current time in the given time zone with the given locale.

GregorianCalendar(TimeZone zone, ULocale locale)
Constructs a GregorianCalendar based on the current time in the given time zone with the given locale.

GregorianCalendar(ULocale locale)
[icu] Constructs a GregorianCalendar based on the current time in the default time zone with the given locale.

Method Summary

int	getActualMaximum(int field) Return the maximum value that this field could have, given the current date.
int	getActualMinimum(int field) Return the minimum value that this field could have, given the current date.
Date	getGregorianChange() Gets the Gregorian Calendar change date.
String	getType() Return the current Calendar type.
protected void	handleComputeFields(int julianDay) Override Calendar to compute several fields specific to the hybrid Gregorian-Julian calendar system.
protected int	handleComputeJulianDay(int bestField) Subclasses may override this.
protected int	handleComputeMonthStart(int eyear, int month, boolean useMonth) Return JD of start of given month/year
protected int	handleGetExtendedYear() Returns the extended year defined by the current fields.
protected int	handleGetLimit(int field, int limitType) Subclass API for defining limits of different types.
protected int	handleGetMonthLength(int extendedYear, int month) Returns the number of days in the given month of the given extended year of this calendar system.
protected int	handleGetYearLength(int eyear) Returns the number of days in the given extended year of this calendar system.
int	hashCode() Override hashCode.
boolean	isEquivalentTo(Calendar other) Returns true if the given Calendar object is equivalent to this one.
boolean	isLeapYear(int year) Determines if the given year is a leap year.
void	roll(int field, int amount) Roll a field by a signed amount.
void	setGregorianChange(Date date) Sets the GregorianCalendar change date.

Methods inherited from class com.ibm.icu.util.Calendar

add, after, before, clear, clear, clone, compareTo, complete, computeFields, computeGregorianFields, computeGregorianMonthStart, computeJulianDay, computeMillisInDay, computeTime, computeZoneOffset, equals, fieldDifference, fieldName, floorDivide, floorDivide, floorDivide, floorDivide, get, getAvailableLocales, getAvailableULocales, getDateTimeFormat, getDateTimeFormat, getDateTimePattern, getDayOfWeekType, getDefaultDayInMonth, getDefaultMonthInYear, getDisplayName, getDisplayName, getFieldCount, getFieldResolutionTable, getFirstDayOfWeek, getGreatestMinimum, getGregorianDayOfMonth, getGregorianDayOfYear, getGregorianMonth, getGregorianYear, getInstance, getInstance, getInstance, getInstance, getInstance, getInstance, getKeywordValuesForLocale, getLeastMaximum, getLimit, getLocale, getMaximum, getMinimalDaysInFirstWeek, getMinimum, getStamp, getTime, getTimeInMillis, getTimeZone, getWeekendTransition, gregorianMonthLength, gregorianPreviousMonthLength, handleCreateFields, handleGetDateFormat, handleGetDateFormat, handleGetDateFormat, handleGetDateFormat, internalGet, internalGet, internalGetTimeInMillis, internalSet, isGregorianLeapYear, isLenient, isSet, isWeekend, isWeekend, julianDayToDayOfWeek, julianDayToMillis, millisToJulianDay, newerField, newestStamp, pinField, prepareGetActual, resolveFields, roll, set, set, set, set, setFirstDayOfWeek, setLenient, setMinimalDaysInFirstWeek, setTime, setTimeInMillis, setTimeZone, toString, validateField, validateField, validateFields, weekNumber, weekNumber

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

BC

public static final int BC

Value of the ERA field indicating the period before the common era (before Christ), also known as BCE. The sequence of years at the transition from BC to AD is ..., 2 BC, 1 BC, 1 AD, 2 AD,...

See Also:

Calendar.ERA, Constant Field Values

Status:

Stable ICU 2.0.

AD

public static final int AD

Value of the ERA field indicating the common era (Anno Domini), also known as CE. The sequence of years at the transition from BC to AD is ..., 2 BC, 1 BC, 1 AD, 2 AD,...

See Also:

Calendar.ERA, Constant Field Values

Status:

Stable ICU 2.0.

isGregorian

protected transient boolean isGregorian

Used by handleComputeJulianDay() and handleComputeMonthStart().

Status:

Stable ICU 2.0.

invertGregorian

protected transient boolean invertGregorian

Used by handleComputeJulianDay() and handleComputeMonthStart().

Status:

Stable ICU 2.0.

Constructor Detail

GregorianCalendar

public GregorianCalendar()

Constructs a default GregorianCalendar using the current time in the default time zone with the default locale.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(TimeZone zone)

Constructs a GregorianCalendar based on the current time in the given time zone with the default locale.

Parameters:

zone - the given time zone.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(Locale aLocale)

Constructs a GregorianCalendar based on the current time in the default time zone with the given locale.

Parameters:

aLocale - the given locale.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(ULocale locale)

[icu] Constructs a GregorianCalendar based on the current time in the default time zone with the given locale.

Parameters:

locale - the given ulocale.

Status:

Stable ICU 3.2.

GregorianCalendar

public GregorianCalendar(TimeZone zone,
                         Locale aLocale)

[icu] Constructs a GregorianCalendar based on the current time in the given time zone with the given locale.

Parameters:

zone - the given time zone.

aLocale - the given locale.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(TimeZone zone,
                         ULocale locale)

Constructs a GregorianCalendar based on the current time in the given time zone with the given locale.

Parameters:

zone - the given time zone.

locale - the given ulocale.

Status:

Stable ICU 3.2.

GregorianCalendar

public GregorianCalendar(int year,
                         int month,
                         int date)

Constructs a GregorianCalendar with the given date set in the default time zone with the default locale.

Parameters:

year - the value used to set the YEAR time field in the calendar.

month - the value used to set the MONTH time field in the calendar. Month value is 0-based. e.g., 0 for January.

date - the value used to set the DATE time field in the calendar.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(int year,
                         int month,
                         int date,
                         int hour,
                         int minute)

Constructs a GregorianCalendar with the given date and time set for the default time zone with the default locale.

Parameters:

year - the value used to set the YEAR time field in the calendar.

month - the value used to set the MONTH time field in the calendar. Month value is 0-based. e.g., 0 for January.

date - the value used to set the DATE time field in the calendar.

hour - the value used to set the HOUR_OF_DAY time field in the calendar.

minute - the value used to set the MINUTE time field in the calendar.

Status:

Stable ICU 2.0.

GregorianCalendar

public GregorianCalendar(int year,
                         int month,
                         int date,
                         int hour,
                         int minute,
                         int second)

Constructs a GregorianCalendar with the given date and time set for the default time zone with the default locale.

Parameters:

year - the value used to set the YEAR time field in the calendar.

month - the value used to set the MONTH time field in the calendar. Month value is 0-based. e.g., 0 for January.

date - the value used to set the DATE time field in the calendar.

hour - the value used to set the HOUR_OF_DAY time field in the calendar.

minute - the value used to set the MINUTE time field in the calendar.

second - the value used to set the SECOND time field in the calendar.

Status:

Stable ICU 2.0.

Method Detail

handleGetLimit

protected int handleGetLimit(int field,
                             int limitType)

Description copied from class: Calendar

Subclass API for defining limits of different types. Subclasses must implement this method to return limits for the following fields:

ERA
 YEAR
 MONTH
 WEEK_OF_YEAR
 WEEK_OF_MONTH
 DAY_OF_MONTH
 DAY_OF_YEAR
 DAY_OF_WEEK_IN_MONTH
 YEAR_WOY
 EXTENDED_YEAR

Specified by:

handleGetLimit in class Calendar

Parameters:

field - one of the above field numbers

limitType - one of MINIMUM, GREATEST_MINIMUM, LEAST_MAXIMUM, or MAXIMUM

Status:

Stable ICU 2.0.

setGregorianChange

public void setGregorianChange(Date date)

Sets the GregorianCalendar change date. This is the point when the switch from Julian dates to Gregorian dates occurred. Default is October 15, 1582. Previous to this, dates will be in the Julian calendar.

To obtain a pure Julian calendar, set the change date to Date(Long.MAX_VALUE). To obtain a pure Gregorian calendar, set the change date to Date(Long.MIN_VALUE).

Parameters:

date - the given Gregorian cutover date.

Status:

Stable ICU 2.0.

getGregorianChange

public final Date getGregorianChange()

Gets the Gregorian Calendar change date. This is the point when the switch from Julian dates to Gregorian dates occurred. Default is October 15, 1582. Previous to this, dates will be in the Julian calendar.

Returns:

the Gregorian cutover date for this calendar.

Status:

Stable ICU 2.0.

isLeapYear

public boolean isLeapYear(int year)

Determines if the given year is a leap year. Returns true if the given year is a leap year.

Parameters:

year - the given year.

Returns:

true if the given year is a leap year; false otherwise.

Status:

Stable ICU 2.0.

isEquivalentTo

public boolean isEquivalentTo(Calendar other)

Returns true if the given Calendar object is equivalent to this one. Calendar override.

Overrides:

isEquivalentTo in class Calendar

Parameters:

other - the Calendar to be compared with this Calendar

Status:

Stable ICU 2.4.

hashCode

public int hashCode()

Override hashCode. Generates the hash code for the GregorianCalendar object

Overrides:

hashCode in class Calendar

Returns:

a hash code value for this object.

Status:

Stable ICU 2.0.

roll

public void roll(int field,
                 int amount)

Roll a field by a signed amount.

Overrides:

roll in class Calendar

Parameters:

field - the calendar field to roll.

amount - the amount by which the field should be rolled.

See Also:

Calendar.roll(int, boolean), Calendar.add(int, int)

Status:

Stable ICU 2.0.

getActualMinimum

public int getActualMinimum(int field)

Return the minimum value that this field could have, given the current date. For the Gregorian calendar, this is the same as getMinimum() and getGreatestMinimum().

Overrides:

getActualMinimum in class Calendar

Parameters:

field - the field whose actual minimum value is desired.

Returns:

the minimum of the given field for the current date of this calendar

See Also:

Calendar.getMinimum(int), Calendar.getGreatestMinimum(int)

Status:

Stable ICU 2.0.

getActualMaximum

public int getActualMaximum(int field)

Return the maximum value that this field could have, given the current date. For example, with the date "Feb 3, 1997" and the DAY_OF_MONTH field, the actual maximum would be 28; for "Feb 3, 1996" it s 29. Similarly for a Hebrew calendar, for some years the actual maximum for MONTH is 12, and for others 13.

Overrides:

getActualMaximum in class Calendar

Parameters:

field - the field whose maximum is desired

Returns:

the maximum of the given field for the current date of this calendar

See Also:

Calendar.getMaximum(int), Calendar.getLeastMaximum(int)

Status:

Stable ICU 2.0.

handleGetMonthLength

protected int handleGetMonthLength(int extendedYear,
                                   int month)

Description copied from class: Calendar

Returns the number of days in the given month of the given extended year of this calendar system. Subclasses should override this method if they can provide a more correct or more efficient implementation than the default implementation in Calendar.

Overrides:

handleGetMonthLength in class Calendar

Status:

Stable ICU 2.0.

handleGetYearLength

protected int handleGetYearLength(int eyear)

Description copied from class: Calendar

Returns the number of days in the given extended year of this calendar system. Subclasses should override this method if they can provide a more correct or more efficient implementation than the default implementation in Calendar.

Overrides:

handleGetYearLength in class Calendar

Status:

Stable ICU 2.0.

handleComputeFields

protected void handleComputeFields(int julianDay)

Override Calendar to compute several fields specific to the hybrid Gregorian-Julian calendar system. These are:

• ERA
• YEAR
• MONTH
• DAY_OF_MONTH
• DAY_OF_YEAR
• EXTENDED_YEAR

Overrides:

handleComputeFields in class Calendar

Status:

Stable ICU 2.0.

handleGetExtendedYear

protected int handleGetExtendedYear()

Description copied from class: Calendar

Returns the extended year defined by the current fields. This will use the EXTENDED_YEAR field or the YEAR and supra-year fields (such as ERA) specific to the calendar system, depending on which set of fields is newer.

Specified by:

handleGetExtendedYear in class Calendar

Returns:

the extended year

Status:

Stable ICU 2.0.

handleComputeJulianDay

protected int handleComputeJulianDay(int bestField)

Description copied from class: Calendar

Subclasses may override this. This method calls handleGetMonthLength() to obtain the calendar-specific month length.

Overrides:

handleComputeJulianDay in class Calendar

Status:

Stable ICU 2.0.

handleComputeMonthStart

protected int handleComputeMonthStart(int eyear,
                                      int month,
                                      boolean useMonth)

Return JD of start of given month/year

Specified by:

handleComputeMonthStart in class Calendar

Parameters:

eyear - the extended year

month - the zero-based month, or 0 if useMonth is false

useMonth - if false, compute the day before the first day of the given year, otherwise, compute the day before the first day of the given month

Returns:

the Julian day number of the day before the first day of the given month and year

Status:

Stable ICU 2.0.

getType

public String getType()

Return the current Calendar type.

Overrides:

getType in class Calendar

Returns:

type of calendar

Status:

Stable ICU 3.8.