The GregorianCalendar class in Java provides methods for working with dates and calendars based on the Gregorian calendar system. It allows creating GregorianCalendar objects specifying a locale, year, month, day, and other parameters. Methods like getActualMaximum, getActualMinimum, and isLeapYear allow determining properties of the calendar system like maximum/minimum values and identifying leap years.

1. GregorianCalendar Class

2. New GregorianCalendar ()
setGregorianChange()
New GregorianCalendar
(object_locale)
getActualMaximum()
New GregorianCalendar
(year,month,day)
getActualMinimum()
New GregorianCalendar
(year,month,day,minute)
isLeapYear()

3. new GregorianCalendar ()
Object GregorianCalendar
timezone
method : new GregorianCalendar ();
return type : GregorianCalendar
content :
Object
GregorianCalendar
timezone
(timezone
)
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ();
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4. new GregorianCalendar
(object_locale)
Object GregorianCalendar
timezone
Locale
method : new GregorianCalendar (
object_locale );
return type : GregorianCalendar
content :
Object
GregorianCalendar
timezone
Locale
(Locale
=
)
example : Locale locale = new Locale (
"th", "TH" ); GregorianCalendar
gregorian_calendar = new
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GregorianCalendar ( locale );

5. new
GregorianCalendar(year,mon
th,day) GregorianCalendar
Object
method : new GregorianCalendar (
year, month, day );
return type : GregorianCalendar
content :
Object
GregorianCalendar
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ( 2012, 12, 12 );
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6. new GregorianCalendar
(
year, month, day, hour, minu
te );
Object GregorianCalendar
method : new GregorianCalendar (
year, month, day, hour, minute );
return type : GregorianCalendar
content :
Object
GregorianCalendar
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ( 2012, 12, 12, 0, 0 );
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7. setGregorianChange()
object
GregorianCalendar
method : setGregorianChange (
object_date );
return type : void
content :
object GregorianCalendar
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ( 2012, 12, 12, 0, 0 );
Date date = new Date ();
gregorian_calendar.setGregorianChange (
date );
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8. getActualMaximum()
method : getActualMaximum (
calendar_constant );
return type : int
content :
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ( 2012, 12, 12, 0, 0 );
int max_year =
gregorian_calendar.getActualMaximum (
Calendar.YEAR ); int max_month =
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gregorian_calendar.getActualMaximum (
Calendar.MONTH );

9. getActualMinimum()
method : getActualMinimum (
calendar_constant );
return type : int
content :
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar ( 2012, 12, 12, 0, 0 );
int min_year =
gregorian_calendar.getActualMinimum (
Calendar.YEAR ); int min_month =
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gregorian_calendar.getActualMinimum (
Calendar.MONTH );

10. isLeapYear()
leap year
method : isLeapYear ( year );
return type : boolean
content :
leap
year
example : GregorianCalendar
gregorian_calendar = new
GregorianCalendar (); if (
gregorian_calendar.isLeapYear ( 2009 ) ) {
System.out.println ( "2007 is leap year." );
}
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