LocalTime plusHours() method in Java with Examples

The plusHours() method of LocalTime class is used to add specified no of Hours value to this LocalTime and return the result as a LocalTime object. This instant is immutable. The calculation wraps around midnight.

Syntax:

public LocalTime plusHours(long hoursToAdd)

Parameters: This method accepts a single parameter hoursToAdd which is the value of hours to be added, it can be a negative value.

Return value: This method returns a LocalTime based on this time with the hours added.

Below programs illustrate the plusHours() method:

Program 1:

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

import java.time.*;

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

        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("19:34:50.63");

        // print LocalTime
        System.out.println("LocalTime before addition : "
                           + time);

        // added 3 hours using plusHours()
        LocalTime value = time.plusHours(3);

        // print result
        System.out.println("LocalTime after addition : "
                           + value);
    }
}

Output:

LocalTime before addition : 19:34:50.630
LocalTime after addition : 22:34:50.630

Program 2:

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

import java.time.*;

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

        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("01:00:01");

        // print LocalTime
        System.out.println("LocalTime before addition : "
                           + time);

        // added -10 hours using plusHours()
        LocalTime value = time.plusHours(-10);

        // print result
        System.out.println("LocalTime after addition : "
                           + value);
    }
}

Output:

LocalTime before addition : 01:00:01
LocalTime after addition : 15:00:01

References: https://docs.oracle.com/javase/10/docs/api/java/time/LocalTime.html#plusHours(long)