LocalDate toEpochSecond() method in Java with Examples

Last Updated : 17 Dec, 2018

The toEpochSecond() method of a LocalDate class is used to convert this LocalDate to the number of seconds since the epoch of 1970-01-01T00:00:00Z. The method combines this local date with the specified time and offsets passed as parameters to calculate the epoch-second value, which is the number of elapsed seconds from 1970-01-01T00:00:00Z. Instants on the timeline after the epoch are positive, earlier are negative. Syntax:

public long toEpochSecond(LocalTime time,
                          ZoneOffset offset)

Parameters: This method accepts two parameters time and offset which are the local time and the zone offset. Return value: This method returns long which is the number of seconds since the epoch of 1970-01-01T00:00:00Z, may be negative. Below programs illustrate the toEpochSecond() method: Program 1:

Java

// Java program to demonstrate
// LocalDate.toEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate localD
            = LocalDate.parse("2018-12-06");

        // print LocalDate
        System.out.println("LocalDate: "
                           + localD);

        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("20:12:32");

        // print Instant
        System.out.println("Passed LocalTime: "
                           + time);

        // create ZoneId
        ZoneOffset zone = ZoneOffset.of("Z");

        // print ZoneId
        System.out.println("Passed ZoneOffset: "
                           + zone);

        // print result
        System.out.println("Epoch Second: "
                           + localD.toEpochSecond(time, zone));
    }
}

Output:

LocalDate: 2018-12-06
Passed LocalTime: 20:12:32
Passed ZoneOffset: Z
Epoch Second: 1544127152

Program 2:

Java

// Java program to demonstrate
// LocalDate.toEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate localD
            = LocalDate.parse("2019-01-01");

        // print LocalDate
        System.out.println("LocalDate: "
                           + localD);

        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("00:00:00");

        // print Instant
        System.out.println("Passed LocalTime: "
                           + time);

        // create ZoneId
        ZoneOffset zone = ZoneOffset.of("Z");

        // print ZoneId
        System.out.println("Passed ZoneOffset: "
                           + zone);

        // print result
        System.out.println("Epoch Second: "
                           + localD.toEpochSecond(time, zone));
    }
}

Output:

LocalDate: 2019-01-01
Passed LocalTime: 00:00
Passed ZoneOffset: Z
Epoch Second: 1546300800

Reference: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#toEpochSecond(java.time.LocalTime, java.time.ZoneOffset)

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LocalDate toEpochSecond() method in Java with Examples

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