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Learn about how to get number of days in Month in java.
Get number of days in Month in java
Using YearMonth’s lengthOfMonth() [Java 8]
You can use YearMonth‘s lengthOfMonth() method to get number of days in Month in java.
- Pass Year and month to YearMonth’s
ofand create YearMonth object. - Call lengthOfMonth() on YearMonth’s object to get number of days in Month in java.
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package org.arpit.java2blog; import java.time.YearMonth; public class GetNumberOfDaysInMonthJava { public static void main(String[] args) { // Get number of days in given month of the year int numberOfDaysInMonth1 = getNumberOfDaysInMonth(2019, 2); System.out.println("Number of days in Feb 2019: "+numberOfDaysInMonth1); int numberOfDaysInMonth2 = getNumberOfDaysInMonth(2020, 2); System.out.println("Number of days in Feb 2020: "+numberOfDaysInMonth2); } // Method to get number of days in month public static int getNumberOfDaysInMonth(int year,int month) { YearMonth yearMonthObject = YearMonth.of(year, month); int daysInMonth = yearMonthObject.lengthOfMonth(); return daysInMonth; } } |
Output:
Number of days in Feb 2019: 28
Number of days in Feb 2020: 29
Number of days in Feb 2020: 29
Further reading:
Using LocalDate’s lengthOfMonth [Java 8]
You can use LocalDate‘s lengthOfMonth() method to get number of days in Month in java.
- Pass Year and month to LocalDate’s
ofand create YearMonth object. - Call lengthOfMonth() on LocalDate’s object to get number of days in Month in java.
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package org.arpit.java2blog; import java.time.LocalDate; public class GetNumberOfDaysInMonthLocalDateJava { public static void main(String[] args) { // Get number of days in given month of the year int numberOfDaysInMonth1 = getNumberOfDaysInMonth(2019, 2); System.out.println("Number of days in Feb 2019: "+numberOfDaysInMonth1); int numberOfDaysInMonth2 = getNumberOfDaysInMonth(2020, 2); System.out.println("Number of days in Feb 2020: "+numberOfDaysInMonth2); } // Method to get number of days in month public static int getNumberOfDaysInMonth(int year,int month) { // LocalDate object LocalDate date = LocalDate.of(year, month, 1); return date.lengthOfMonth(); } } |
Output:
Number of days in Feb 2019: 28
Number of days in Feb 2020: 29
Number of days in Feb 2020: 29
Using Calendar
You can use Calendar’s getActualMaximum() to get number of days in Month in java.
- Create instance of Calendar object.
- Call Calendar’s getActualMaximum() to get number of days in Month in java.
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package org.arpit.java2blog; import java.util.Calendar; import java.util.GregorianCalendar; public class GetNumberOfDaysInMonthCalendarJava { public static void main(String[] args) { // Get number of days in given month of the year int numberOfDaysInMonth1 = getNumberOfDaysInMonth(2019, Calendar.FEBRUARY); System.out.println("Number of days in Feb 2019: "+numberOfDaysInMonth1); int numberOfDaysInMonth2 = getNumberOfDaysInMonth(2020, Calendar.FEBRUARY); System.out.println("Number of days in Feb 2020: "+numberOfDaysInMonth2); } // Method to get number of days in month public static int getNumberOfDaysInMonth(int year,int month) { // Create a calendar object and set year and month Calendar mycal = new GregorianCalendar(year, month, 1); int daysInMonth = mycal.getActualMaximum(Calendar.DAY_OF_MONTH); return daysInMonth; } } |
Output:
Number of days in Feb 2019: 28
Number of days in Feb 2020: 29
Number of days in Feb 2020: 29
That’s all about how to get number of days in Month in java
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