ChronoLocalDate getLong() method in Java with Examples

The getLong() method of ChronoLocalDate interface in Java gets the era applicable at this date.

Syntax:

public long getLong(TemporalField field)

Parameter: This method accepts a single mandatory parameter field which specifies the field to get and not null.

Return Value: The function returns the value for the field.

Exceptions: The program throws three exceptions which are described as below:

1. DateTimeException: thrown if a value for the field cannot be obtained or the value is outside the range of valid values for the field.
2. UnsupportedTemporalTypeException: thrown if the field is not supported or the range of values exceeds an long.
3. ArithmeticException: thrown if numeric overflow occurs

Below programs illustrate the getLong() method of ChronoLocalDate in Java:

Program 1:

// Program to illustrate the getLong() method

import java.util.*;
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoField;

public class GfG {
    public static void main(String[] args)
    {
        // Parses the date
        ChronoLocalDate dt
            = LocalDate.parse("2018-11-27");

        // Prints the day number
        System.out.println(dt.getLong(
            ChronoField.DAY_OF_MONTH));
    }
}

Output:

27

Program 2:

// Program to illustrate the getLong() method

import java.util.*;
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoField;

public class GfG {
    public static void main(String[] args)
    {
        // Parses the date
        ChronoLocalDate dt
            = LocalDate.parse("2018-11-27");

        // Prints the day number
        System.out.println(dt.getLong(
            ChronoField.DAY_OF_YEAR));
    }
}

Output:

331

Program 3:

// Program to illustrate the getLong() method
// Exception Program

import java.util.*;
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoField;

public class GfG {
    public static void main(String[] args)
    {
        try {
            ChronoLocalDate dt
                = LocalDate.parse("2017-01-32");
            System.out.println(dt.getLong(
                ChronoField.DAY_OF_MONTH));
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

java.time.format.DateTimeParseException:
 Text '2017-01-32' could not be parsed:
 Invalid value for DayOfMonth (valid values 1 - 28/31): 32

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/temporal/TemporalAccessor.html#getLong-java.time.temporal.TemporalField-