Java MonthDay Class

Java MonthDay class is an immutable date-time object that represents the combination of a month and day-of-month. It inherits Object class and implements the Comparable interface.

JJava MonthDay Class Declaration

Let's see the declaration of java.time.MonthDay class.

public final class MonthDay extends Object 
implements TemporalAccessor, TemporalAdjuster, Comparable<MonthDay>, Serializable

Methods of Java MonthDay Class

Method	Description
LocalDate atYear(int year)	It is used to combine this month-day with a year to create a LocalDate.
String format(DateTimeFormatter formatter)	It is used to format this month-day using the specified formatter.
int get(TemporalField field)	It is used to get the value of the specified field from this month-day as an int.
boolean isValidYear(int year)	It is used to check if the year is valid for this month-day.
static MonthDay now()	It is used to obtain the current month-day from the system clock in the default time-zone.
static MonthDay of(int month, int dayOfMonth)	It is used to obtain an instance of MonthDay.
ValueRange range(TemporalField field)	It is used to get the range of valid values for the specified field.
int getDayOfMonth()	It gets the day-of-month field.
Month getMonth()	It gets the month-of-year field using the Month enum.
int getMonthValue()	It gets the month-of-year field from 1 to 12.
int hashCode()	It returns a hash code for this month-day.
boolean isAfter(MonthDay other)	It checks if this month-day is after the specified month-day.
static MonthDay now()	It obtains the current month-day from the system clock in the default time-zone.
static MonthDay now(Clock clock)	It obtains the current month-day from the specified clock.
static MonthDay of(int month, int dayOfMonth)	It obtains an instance of MonthDay.
R query(TemporalQuery query)	It queries this month-day using the specified query.
ValueRange range(TemporalField field)	It gets the range of valid values for the specified field.
String toString()	It outputs this month-day as a String, such as -12-03.
MonthDay with(Month month)	It returns a copy of this MonthDay with the month-of-year altered.
MonthDay withDayOfMonth(int dayOfMonth)	It returns a copy of this MonthDay with the day-of-month altered.
MonthDay withMonth(int month)	It returns a copy of this MonthDay with the month-of-year altered.

Java MonthDay Class Example

MonthDayExample1.java

import java.time.*;
public class MonthDayExample1 {
  public static void main(String[] args) {
    MonthDay month = MonthDay.now();
    LocalDate date = month.atYear(1994);
    System.out.println(date);
  }
}

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Output:

1994-01-17

Java MonthDay Class Example: isValidYear()

MonthDayExample2.java

import java.time.*;
public class MonthDayExample2 {
  public static void main(String[] args) {
    MonthDay month = MonthDay.now();
    boolean b = month.isValidYear(2012);
    System.out.println(b);
  }
}

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Output:

true

Java MonthDay Class Example: get()

MonthDayExample3.java

import java.time.*;
import java.time.temporal.*;
public class MonthDayExample3{
  public static void main(String[] args) {
    MonthDay month = MonthDay.now();
    long n = month.get(ChronoField.MONTH_OF_YEAR);
    System.out.println(n);
  }
}

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Output:

Java MonthDay Class Example: range()

MonthDayExample4.java

import java.time.*;
import java.time.temporal.*;
public class MonthDayExample4 {
  public static void main(String[] args) {
    MonthDay month = MonthDay.now();
    ValueRange r1 = month.range(ChronoField.MONTH_OF_YEAR);
    System.out.println(r1);
    ValueRange r2 = month.range(ChronoField.DAY_OF_MONTH);
    System.out.println(r2);
  }
}

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Output: