Java Duration plusMillis() Method

The plusMillis() method in Java, part of the java.time.Duration class, is used to add a specified number of milliseconds to a Duration instance. This method is useful for calculating durations that are a specified number of milliseconds longer than the original duration.

Table of Contents

1. Introduction
2. plusMillis() Method Syntax
3. Understanding plusMillis()
4. Examples
   • Basic Usage
   • Handling Negative and Large Millisecond Values
5. Real-World Use Case
6. Conclusion

Introduction

The plusMillis() method allows you to add a specified number of milliseconds to an existing Duration instance. This is particularly useful when you need to adjust a duration by a specific number of milliseconds, such as extending an interval or adding additional milliseconds to a task.

plusMillis() Method Syntax

The syntax for the plusMillis() method is as follows:

public Duration plusMillis(long millisToAdd)

Parameters:

• millisToAdd: The number of milliseconds to add, which can be positive or negative.

Returns:

• A Duration that is the result of adding the specified number of milliseconds to the original duration.

Throws:

• This method does not throw any exceptions.

Understanding plusMillis()

The plusMillis() method creates a new Duration instance by adding the specified number of milliseconds to the original duration. The result is a new Duration object representing the adjusted time span.

Examples

Basic Usage

To demonstrate the basic usage of plusMillis(), we will add a specified number of milliseconds to an existing Duration instance.

Example

import java.time.Duration;

public class DurationPlusMillisExample {
    public static void main(String[] args) {
        Duration originalDuration = Duration.ofSeconds(10);
        Duration addedDuration = originalDuration.plusMillis(5000);

        System.out.println("Original duration: " + originalDuration);
        System.out.println("Added duration: " + addedDuration);
    }
}

Output:

Original duration: PT10S
Added duration: PT15S

Handling Negative and Large Millisecond Values

This example shows how to use plusMillis() to handle negative and large millisecond values.

Example

import java.time.Duration;

public class NegativeAndLargeMillisExample {
    public static void main(String[] args) {
        Duration duration = Duration.ofSeconds(10);

        // Add a negative number of milliseconds
        Duration negativeResult = duration.plusMillis(-2000);
        System.out.println("After adding -2000 milliseconds: " + negativeResult);

        // Add a large number of milliseconds
        Duration largeResult = duration.plusMillis(15000);
        System.out.println("After adding 15000 milliseconds: " + largeResult);
    }
}

Output:

After adding -2000 milliseconds: PT8S
After adding 15000 milliseconds: PT25S

Real-World Use Case

Adjusting Time Intervals

In real-world applications, the plusMillis() method can be used to adjust time intervals, such as adding additional milliseconds to a task or extending a delay by a certain number of milliseconds.

Example

import java.time.Duration;

public class TimeIntervalAdjustmentExample {
    public static void main(String[] args) {
        Duration originalDuration = Duration.ofMillis(20000);
        long extraMillis = 5000;

        // Extend the original duration by adding extra milliseconds
        Duration extendedDuration = originalDuration.plusMillis(extraMillis);

        System.out.println("Original duration: " + originalDuration);
        System.out.println("Extended duration: " + extendedDuration);
    }
}

Output:

Original duration: PT20S
Extended duration: PT25S

Conclusion

The Duration.plusMillis() method is used to add a specified number of milliseconds to a Duration instance. This method is particularly useful for adjusting durations by a specific number of milliseconds. By understanding and using this method, you can effectively manage and manipulate time-based data in your Java applications.