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Java LocalDate Class | getLong() Method with Example

LocalDate Class getLong() method: Here, we are going to learn about the getLong() method of LocalDate Class with its syntax and example.
Submitted by Preeti Jain, on May 30, 2020

LocalDate Class getLong() method

• getLong() method is available in java.time package.
• getLong() method is used to get the value as long for the given temporal field from this LocalDate.
• getLong() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• getLong() method may throw an exception at the time of returning value as long.
  • DateTimeException: This exception may throw when the given field couldn't be generated.
  • UnsupportedTemporalTypeException: This exception may throw when the given field is unsupported.
  • ArithmeticException: This exception may throw when the calculated result exceeds the limit.

Syntax:

    public long getLong(TemporalField t_field);

Parameter(s):

• TemporalField t_field – represents the field of the returned value.

Return value:

The return type of this method is long, it gets the value of the given field in a long from this LocalDate.

Example:

// Java program to demonstrate the example 
// of getLong(TemporalField t_field) method 
// of LocalDate

import java.time.*;
import java.time.temporal.*;

public class GetLongOfLocalDate {
    public static void main(String args[]) {
        // Instantiates two LocalDate
        LocalDate l_da1 = LocalDate.parse("2007-04-04");
        LocalDate l_da2 = LocalDate.now();

        // Display l_da1,l_da2
        System.out.println("LocalDate l_da1 and l_da2: ");
        System.out.println("l_da1: " + l_da1);
        System.out.println("l_da2: " + l_da2);

        System.out.println();

        // Here, this method gets the value as long
        // for the given field YEAR from this
        // date l_da1
        long get_val = l_da1.getLong(ChronoField.YEAR);

        // Display get_val
        System.out.println("l_da1.getLong(ChronoField.YEAR): " + get_val);

        // Here, this method gets the value as long
        // for the given field DAY_OF_WEEK 
        // from this date l_da2
        get_val = l_da2.getLong(ChronoField.DAY_OF_WEEK);

        // Display get_val
        System.out.println("l_da2.getLong(ChronoField.DAY_OF_WEEK): " + get_val);
    }
}

Output

LocalDate l_da1 and l_da2: 
l_da1: 2007-04-04
l_da2: 2020-05-30

l_da1.getLong(ChronoField.YEAR): 2007
l_da2.getLong(ChronoField.DAY_OF_WEEK): 6