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Java Calendar 클래스는 특정 시점과 MONTH, YEAR, HOUR 등과 같은 달력 필드 집합 간의 날짜를 변환하는 메서드를 제공하는 추상 클래스입니다. Object 클래스를 상속하고 Comparable 인터페이스를 구현합니다.

Java Calendar 클래스 선언

java.util.Calendar 클래스의 선언을 살펴보겠습니다.

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

달력 방법 목록

Java 달력 클래스 예

 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()); } } 

산출:

arp 명령

 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 

Java 달력 클래스 예: 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)); } } 

산출:

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

Java 달력 클래스 예: 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()); } } 

산출:

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

Java 달력 클래스 예: 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); } } 

산출:

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

Java 달력 클래스 예: 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); } } 

산출:

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