Java Month Enum

The Month is an immutable and thread-safe enum that represents 12 months of the year – January, February, March, April, May, June, July, August, September, October, November, and December.

How to use

The Month enum can be used to represent month-of-year, like – April. It is a good practice to use enum in applications rather than the int value to ensure the code clarity. Try the following examples to better understand –

Current month example

The following example program shows how you can use Month enum with LocalDate to print current month.

MonthExample1.javaCopy
import java.time.LocalDate;
import java.time.Month;

public class MonthExample1 {

    public static void main(String[] args) {

        // Get instance of LocalDate
        LocalDate localDate = LocalDate.now();

        // Get current month using localDate
        Month month = Month.from(localDate);
        System.out.println(month);
    }
}
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All months example

The following example program shows how you can use Month enum to print all the months.

MonthExample2.javaCopy
import java.time.Month;

public class MonthExample2 {

    public static void main(String[] args) {

        // Get all the months
        Month[] months = Month.values();

        // Print every month
        for (Month month : months) {
            System.out.println(month);
        }
    }
}
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Add/Subtract example

The following example program shows how you can plus/minus months with Month enum.

MonthExample3.javaCopy
import java.time.Month;

public class MonthExample3 {

    public static void main(String[] args) {

        // Get month by month number
        Month month = Month.of(1); // 1 = JANUARY
        System.out.println(month);

        // Add 5 months
        month = month.plus(5); // JANUARY + 5 = JUNE
        System.out.println(month);

        // Subtract 2 months
        month = month.minus(2); // JUNE - 2 = APRIL
        System.out.println(month);
    }
}
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Total days example

The following example program shows how you can use Month enum to get the total number of days in the month.

MonthExample4.javaCopy
import java.time.LocalDate;
import java.time.Month;
import java.time.Year;

public class MonthExample4 {

    public static void main(String[] args) {

        // Get instance of LocalDate
        LocalDate localDate = LocalDate.now();

        // Use localDate to get month
        Month month = Month.from(localDate);

        // Get leap year using isLeap() of Year
        boolean isLeapYear = Year.isLeap(localDate.getYear());

        // Total no of days in month
        int totalDays = month.length(isLeapYear);
        System.out.println(String.format("Total days in %s is %d", month.toString(), totalDays));
    }
}
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