Create a Directory in Java

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

1. Using `File#mkdirs()` method

The standard solution to create a directory is using the mkdir() method from the File class. It returns true if the directory is created; false otherwise. The invocation for this method would look like below:

import java.io.File;

public class Main {

public static void main(String[] args) {

File directory = new File("/path/dir");

if (directory.mkdir()) {

System.out.println("Directory created successfully");

}

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Note that the mkdir() method is useful for creating a single directory. If you want to create a folder hierarchy, you should use the mkdirs() method instead. It creates the directory named by the abstract pathname, including any non-existent parent directories.

For example, the following code creates the parent directory named path (if non-existent), followed by its subdirectory dir.

import java.io.File;

public class Main {

public static void main(String[] args) {

File directory = new File("/path/dir");

if (directory.mkdirs()) {

System.out.println("Directory created successfully");

}

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2. Using `Files.createDirectories()` method

With Java 7, you can use the createDirectory() method of the Files class to create a new directory. It throws FileAlreadyExistsException if the directory already exists and IOException if the parent directory does not exist.

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Paths;

public class Main {

public static void main(String[] args) throws IOException {

String path = "/path/dir";

Files.createDirectory(Paths.get(path));

}

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With Java 8, you should use the Files.createDirectories() method that creates a new directory by creating all non-existent parent directories first. This method does not throw an exception if the directory already exists.

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Paths;

public class Main {

public static void main(String[] args) throws IOException {

String path = "/path/dir";

Files.createDirectories(Paths.get(path));

}

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3. Using `FileUtils.forceMkdir()` method

Apache Commons IO also provides several utility methods for working with files. To construct a directory, including any necessary but non-existent parent directories, you can use the FileUtils.forceMkdir() method. It throws IOException if the file already exists but is not a directory.

import org.apache.commons.io.FileUtils;

import java.io.File;

import java.io.IOException;

public class Main {

public static void main(String[] args) throws IOException {

String path = "/path/dir";

FileUtils.forceMkdir(new File(path));

}

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That’s all about creating a directory in Java.

Create a Directory in Java

1. Using File#mkdirs() method

2. Using Files.createDirectories() method

3. Using FileUtils.forceMkdir() method

Share this:

1. Using `File#mkdirs()` method

2. Using `Files.createDirectories()` method

3. Using `FileUtils.forceMkdir()` method