Clasa Java Calendar este o clasă abstractă care oferă metode de conversie a datei între un anumit moment în timp și un set de câmpuri calendaristice, cum ar fi LUNA, AN, ORA, etc. Moștenește clasa Object și implementează interfața Comparable.

Declarație de clasă Java Calendar

Să vedem declarația clasei java.util.Calendar.

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

Lista metodelor calendaristice

Exemplu de clasă de calendar Java

 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()); } } 

Ieșire:

 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 

Exemplu de clasă Java Calendar: 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)); } } 

Ieșire:

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

Exemplu de clasă Java Calendar: 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()); } } 

Ieșire:

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

Exemplu de clasă Java Calendar: 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); } } 

Ieșire:

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

Exemplu de clasă Java Calendar: 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); } } 

Ieșire:

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