Kotlin Duration inWholeMilliseconds Function

The inWholeMilliseconds function in Kotlin is used to convert a Duration object to the number of whole milliseconds it represents. It is part of the Kotlin standard library’s kotlin.time package and provides a way to extract the number of complete milliseconds from a duration.

Table of Contents

1. Introduction
2. inWholeMilliseconds Function Syntax
3. Understanding inWholeMilliseconds
4. Examples
   • Basic Usage
   • Converting Different Duration Units to Whole Milliseconds
   • Using inWholeMilliseconds with Conditional Logic
   • Chaining inWholeMilliseconds with Other Functions
5. Real-World Use Case
6. Conclusion

Introduction

The inWholeMilliseconds function allows you to convert a Duration object to a Long representing the number of whole milliseconds it encompasses. This is useful for scenarios where you need to calculate the number of complete milliseconds within a given duration.

inWholeMilliseconds Function Syntax

The syntax for the inWholeMilliseconds function is as follows:

val inWholeMilliseconds: Long

Returns:

• A Long value representing the number of whole milliseconds in the duration.

Understanding inWholeMilliseconds

The inWholeMilliseconds function works by converting the specified Duration object to a Long value representing the number of whole milliseconds. This function can be useful when you need to extract the millisecond component from a larger duration.

Examples

Basic Usage

To demonstrate the basic usage of inWholeMilliseconds, we will create a Duration object and convert it to the number of whole milliseconds.

Example

import kotlin.time.Duration
import kotlin.time.Duration.Companion.seconds

fun main() {
    val duration = 3.seconds
    val wholeMilliseconds = duration.inWholeMilliseconds
    println("Whole milliseconds: $wholeMilliseconds")
}

Output:

Whole milliseconds: 3000

Converting Different Duration Units to Whole Milliseconds

This example shows how to convert various durations to whole milliseconds.

Example

import kotlin.time.Duration
import kotlin.time.Duration.Companion.minutes
import kotlin.time.Duration.Companion.milliseconds

fun main() {
    val duration1 = 2.minutes
    val duration2 = 5000.milliseconds
    println("Whole milliseconds in duration1: ${duration1.inWholeMilliseconds}")
    println("Whole milliseconds in duration2: ${duration2.inWholeMilliseconds}")
}

Output:

Whole milliseconds in duration1: 120000
Whole milliseconds in duration2: 5000

Using inWholeMilliseconds with Conditional Logic

This example shows how to use inWholeMilliseconds in a conditional context.

Example

import kotlin.time.Duration
import kotlin.time.Duration.Companion.seconds

fun main() {
    val duration = 2.seconds
    if (duration.inWholeMilliseconds > 1500) {
        println("The duration is more than 1500 milliseconds.")
    } else {
        println("The duration is within 1500 milliseconds.")
    }
}

Output:

The duration is more than 1500 milliseconds.

Chaining inWholeMilliseconds with Other Functions

The inWholeMilliseconds function can be chained with other duration functions to perform more complex operations.

Example

import kotlin.time.Duration
import kotlin.time.Duration.Companion.seconds
import kotlin.time.Duration.Companion.milliseconds

fun main() {
    val duration = (10.seconds + 500.milliseconds) - 200.milliseconds
    println("Whole milliseconds in the resulting duration: ${duration.inWholeMilliseconds}")
}

Output:

Whole milliseconds in the resulting duration: 10300

Real-World Use Case

Calculating Animation Duration in Milliseconds

In real-world applications, the inWholeMilliseconds function can be used to calculate the number of whole milliseconds for animation durations or other time-based events.

Example

import kotlin.time.Duration
import kotlin.time.Duration.Companion.seconds
import kotlin.time.Duration.Companion.milliseconds

fun main() {
    val animationDuration = 5.seconds + 250.milliseconds
    val animationMilliseconds = animationDuration.inWholeMilliseconds
    println("Total animation duration in milliseconds: $animationMilliseconds")
}

Output:

Total animation duration in milliseconds: 5250

Conclusion

The inWholeMilliseconds function in Kotlin provides a convenient way to convert Duration objects to the number of whole milliseconds they represent. By understanding and using the inWholeMilliseconds function, you can efficiently manage and manipulate duration values in your Kotlin applications, ensuring that you can handle time-related operations according to your requirements.