The maxLength() method is a built-in method of the Month ENUM which is used to get the maximum length of this month in number of days. For example, February can have both 28 days and 29 days depending on whether this year is a leap year or not. Therefore, this method will return 29 for February as maximum number of days in feb is 29.
Syntax:
public int maxLength()
Parameters: This method does not accepts any parameter.
Return Value: This method returns the maximum length of this month in number of days present in it.
Below programs illustrate the above method:
Program 1:
import java.time.*;import java.time.Month;import java.time.temporal.ChronoField;  class monthEnum {    public static void main(String[] args)    {        // Create a month instance        Month month = Month.FEBRUARY;          // Print the maximum length of this Month        System.out.println(month.maxLength());    }} |
Output:
29
Program 2:
import java.time.*;import java.time.Month;import java.time.temporal.ChronoField;  class monthEnum {    public static void main(String[] args)    {        // Create a month instance        Month month = Month.MAY;          // Print the max length of this Month        System.out.println(month.maxLength());    }} |
Output:
31
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/Month.html#maxLength–
