JapaneseChronology dateYearDay(int, int) method in Java with Example

The dateYearDay() method of java.time.chrono.JapaneseChronology class is used to retrieve the Japanese date according to the Iso calendar for the particular year and date.
Syntax:

public JapaneseDate dateYearDay(
  int prolepticYear, int dayOfYear)

Parameter: This method takes the following arguments as parameter: 

• year: which is the integer proleptic year for the year field of JapaneseDate
• day: which is the integer day for the day field of JapaneseDate

Return Value: This method returns the Japanese date according to the Japanese calendar for the particular year and date.
Exception: This method throws DateTimeException – if the given data is unable to form a date.
Below are the examples to illustrate the dateYearDay() method:
Example 1:

Java

// Java program to demonstrate
// dateYearDay() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();

            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();

            // getting JapaneseDate for the
            // given date and year field
            // by using dateYearDay() method
            JapaneseDate date
                = crono.dateYearDay(2018, 24);

            // display the result
            System.out.println(
                "JapaneseDate is: "
                + date);
        }
        catch (DateTimeException e) {
            System.out.println(
                "passed parameter can "
                + "not form a date");
            System.out.println(
                "Exception thrown: " + e);
        }
    }
}

Output:

JapaneseDate is: Japanese Heisei 30-01-24

Example 2:

Java

// Java program to demonstrate
// dateYearDay() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();

            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();

            // getting JapaneseDate for the
            // given date and year field
            // by using dateYearDay() method
            JapaneseDate date
                = crono.dateYearDay(1440, 24);

            // display the result
            System.out.println(
                "JapaneseDate is: "
                + date);
        }
        catch (DateTimeException e) {
            System.out.println(
                "passed parameter can "
                + "not form a date");
            System.out.println(
                "Exception thrown: " + e);
        }
    }
}

Output:

passed parameter can not form a date
Exception thrown:
 java.time.DateTimeException:
 JapaneseDate before Meiji 6 is not supported

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/JapaneseChronology.html#dateYearDay-int-int-