LocalTime atDate() method in Java with Examples

The atDate() method of a LocalTime class is used to combine this LocalTime Object with a LocalDate Object to create a LocalDateTime. All possible combinations of date and time are valid.

Syntax:

public LocalDateTime atDate(LocalDate date)

Parameters: This method accepts a single parameter date which is the date to combine with LocalTime Object, not null.

Return value: This method returns the LocalDateTime object after combining LocalTime and LocalDate, not null.

Below programs illustrate the atDate() method:
Program 1:

// Java program to demonstrate
// LocalTime.atDate() method

import java.time.*;

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

        // create a LocalTime Object
        LocalTime time
            = LocalTime.parse("09:32:42");

        // create LocalDate Object
        LocalDate date
            = LocalDate.parse("2018-12-05");

        // apply atDate()
        LocalDateTime local
            = time.atDate(date);

        // print LocalDateTime
        System.out.println("Date and Time:"
                           + local.toString());
    }
}

Output:

Date and Time:2018-12-05T09:32:42

Program 2:

// Java program to demonstrate
// LocalTime.atDate() method

import java.time.*;

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

        // create a LocalTime Object
        LocalTime time = LocalTime.parse("18:12:49");

        // create LocalDate Object
        LocalDate date = LocalDate.parse("2017-12-05");

        // apply atDate()
        LocalDateTime local = time.atDate(date);

        // print LocalDateTime
        System.out.println("Date and Time:"
                           + local.toString());
    }
}

Output:

Date and Time:2017-12-05T18:12:49

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