Create a directory in Kotlin

This post will discuss how to create a directory in Kotlin, including any non-existent parent directories.

1. Using `Files.createDirectories()` function

The standard solution to create a single directory in Kotlin is using the Files.createDirectory() function. It throws FileAlreadyExistsException if the specified directory already exists and IOException if the parent directory is non-existent.

import java.nio.file.Files

import java.nio.file.Paths

fun main() {

val path = "/existingdir/dir"

Files.createDirectory(Paths.get(path))

}

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To create any non-existent parent directories first before creating the main directory, consider using the Files.createDirectories() function. Unlike the Files#createDirectory() function, it does not throw an exception if the directory already exists. For instance, the following snippet creates the parent directory dir1 and subdirectory dir2 (if it doesn’t exist).

import java.nio.file.Files

import java.nio.file.Paths

fun main() {

val path = "/dir1/dir2"

Files.createDirectories(Paths.get(path))

}

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2. Using `File#mkdirs()` function

Alternately, we can use the Files#createDirectory() function to create a new single directory. Unlike the previous approach, it doesn’t throw an exception but simply returns true or false value depending upon the directory is created or not. It can be used as follows:

import java.io.File

fun main() {

val directory = File("/existingdir/dir")

if (directory.mkdir()) {

println("Directory created successfully")

}

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To create a hierarchy of directories, use the File#mkdirs() function instead. It creates the directory with the specified pathname, including any non-existent parent directories.

import java.io.File

fun main() {

val directory = File("/dir1/dir2")

if (directory.mkdirs()) {

println("Directory created successfully")

}

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That’s all about creating a directory in Kotlin.

Create a directory in Kotlin

1. Using Files.createDirectories() function

2. Using File#mkdirs() function

1. Using `Files.createDirectories()` function

2. Using `File#mkdirs()` function