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IsoChronology dateYearDay(Era, int, int) method in Java with Example

  • Last Updated : 27 Mar, 2020

The dateYearDay() method of java.time.chrono.IsoChronology class is used to retrieve the local date according to the Iso calendar for the particular era.

Syntax:

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public LocalDate dateYearDay(Era era,
                             int yearOfEra,
                             int dayOfYear)

Parameter: This method takes the following arguments as parameter.

  • era: which is the object of type Era
  • year: which is the integer year for the year field of LocalDate
  • day: which is the integer day for the day field of LocalDate

Return Value: This method returns the local date according to the Iso calendar for the particular era.



Below are the examples to illustrate the dateYearDay() method:

Example 1:




// 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
            // LocalDate Object
            LocalDate hidate = LocalDate.now();
  
            // getting IsoChronology
            // used in LocalDate
            IsoChronology crono
                = hidate.getChronology();
  
            // getting LocalDate for the
            // given date and year field
            // by using dateYearDay() method
            LocalDate date
                = crono.dateYearDay(
                    IsoEra.BCE, 1440, 24);
  
            // display the result
            System.out.println("LocalDate is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}
Output:
LocalDate is: -1439-01-24

Example 2:




// 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
            // LocalDate Object
            LocalDate hidate = LocalDate.now();
  
            // getting IsoChronology
            // used in LocalDate
            IsoChronology crono
                = hidate.getChronology();
  
            // getting LocalDate for the
            // given date and year field
            // by using dateYearDay() method
            LocalDate date
                = crono.dateYearDay(
                    IsoEra.BCE, 0000, 30);
  
            // display the result
            System.out.println("LocalDate is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}
Output:
LocalDate is: 0001-01-30

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




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