LocalTime plus() method in Java with Examples

In LocalTime class, there are two types of plus() method depending upon the parameters passed to it.

plus(long amountToAdd, TemporalUnit unit)

plus() method of a LocalTime class used to return a copy of this LocalTime with the specified amount of unit added.If it is not possible to add the amount, because the unit is not supported or for some other reason, an exception is thrown. This LocalTime object is immutable and unaffected by this method call.

Syntax:

public LocalTime plus(long amountToAdd,
                      TemporalUnit unit)

Parameters: This method accepts two parameters amountToAdd which is the amount of the unit to add to the result, may be negative and unit which is the unit of the amount to add, not null.

Return value: This method returns LocalTime based on this LocalTime with the specified amount added.

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

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

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

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

        // create an LocalTime object
        LocalTime lt
            = LocalTime.parse("19:34:50.63");

        // add 2 Hours to LocalTime
        LocalTime value
            = lt.plus(2, ChronoUnit.HOURS);

        // print result
        System.out.println("LocalTime after adding 2 Hours: "
                           + value);
    }
}

Output:

LocalTime after adding 2 Hours: 21:34:50.630

plus(TemporalAmount amountToAdd)

plus() method of a LocalTime class used to return a copy of this LocalTime with the specified amount added to date-time.The amount is typically Period or Duration but may be any other type implementing the TemporalAmount interface.

Syntax:

public LocalTime plus(TemporalAmount amountToAdd)

Parameters: This method accepts one single parameter amountToAdd which is the amount to add, It should not be null.

Return value: This method returns LocalTime based on this LocalTime with the addition made, not null

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

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

import java.time.*;
public class GFG {
    public static void main(String[] args)
    {

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

        // add 55 Minutes to LocalTime
        LocalTime value
            = lt.plus(Duration.ofMinutes(55));

        // print result
        System.out.println("LocalTime after adding 55 Minutes: "
                           + value);
    }
}

Output:

LocalTime after adding 55 Minutes: 20:29:50.630

References:
https://docs.oracle.com/javase/10/docs/api/java/time/LocalTime.html#plus(java.time.temporal.TemporalAmount)
https://docs.oracle.com/javase/10/docs/api/java/time/LocalTime.html#plus(long, java.time.temporal.TemporalUnit)