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Klasa Java Calendar je apstraktna klasa koja pruža metode za pretvaranje datuma između određenog trenutka u vremenu i skupa kalendarskih polja kao što su MJESEC, GODINA, SAT itd. Nasljeđuje klasu Objekt i implementira sučelje Comparable.

npm očisti predmemoriju

Deklaracija klase Java kalendara

Pogledajmo deklaraciju klase java.util.Calendar.

 public abstract class Calendar extends Object implements Serializable, Cloneable, Comparable 

Popis kalendarskih metoda

Primjer Java kalendarske klase

 import java.util.Calendar; public class CalendarExample1 { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println('The current date is : ' + calendar.getTime()); calendar.add(Calendar.DATE, -15); System.out.println('15 days ago: ' + calendar.getTime()); calendar.add(Calendar.MONTH, 4); System.out.println('4 months later: ' + calendar.getTime()); calendar.add(Calendar.YEAR, 2); System.out.println('2 years later: ' + calendar.getTime()); } } 

Izlaz:

 The current date is : Thu Jan 19 18:47:02 IST 2017 15 days ago: Wed Jan 04 18:47:02 IST 2017 4 months later: Thu May 04 18:47:02 IST 2017 2 years later: Sat May 04 18:47:02 IST 2019 

Primjer Java kalendarske klase: get()

 import java.util.*; public class CalendarExample2{ public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println('At present Calendar's Year: ' + calendar.get(Calendar.YEAR)); System.out.println('At present Calendar's Day: ' + calendar.get(Calendar.DATE)); } } 

Izlaz:

java swing vodič

 At present Calendar's Year: 2017 At present Calendar's Day: 20 

Primjer Java kalendarske klase: getInstance()

 import java.util.*; public class CalendarExample3{ public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.print('At present Date And Time Is: ' + calendar.getTime()); } } 

Izlaz:

 At present Date And Time Is: Fri Jan 20 14:26:19 IST 2017 

Primjer Java kalendarske klase: getMaximum()

 import java.util.*; public class CalendarExample4 { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); int maximum = calendar.getMaximum(Calendar.DAY_OF_WEEK); System.out.println('Maximum number of days in week: ' + maximum); maximum = calendar.getMaximum(Calendar.WEEK_OF_YEAR); System.out.println('Maximum number of weeks in year: ' + maximum); } } 

Izlaz:

 Maximum number of days in week: 7 Maximum number of weeks in year: 53 

Primjer Java kalendarske klase: getMinimum()

 import java.util.*; public class CalendarExample5 { public static void main(String[] args) { Calendar cal = Calendar.getInstance(); int maximum = cal.getMinimum(Calendar.DAY_OF_WEEK); System.out.println('Minimum number of days in week: ' + maximum); maximum = cal.getMinimum(Calendar.WEEK_OF_YEAR); System.out.println('Minimum number of weeks in year: ' + maximum); } } 

Izlaz:

 Minimum number of days in week: 1 Minimum number of weeks in year: 1