How to create a folder in Java?

Question

How can I create an empty folder in Java?

Valise

Hmm.. I Googled and this was the first result (; – Coadjutrix

@CoolBeans The creators of StackOverflow have said they want questions here to be the first hit on Google. Nothing wrong with creating a simple google-able question here if it is clearly stated and original (not a duplicate on StackOverflow). – Grating

Answer 1

File f = new File("C:\\TEST");
try{
    if(f.mkdir()) { 
        System.out.println("Directory Created");
    } else {
        System.out.println("Directory is not created");
    }
} catch(Exception e){
    e.printStackTrace();
} 

Pavlov

Just wondering: What case would trigger the else-branch? Wouldn't there be an exception whenever the creation fails? – Pantheon

Isn't it mkdir (all lower case)? @0xA3: mkdir throws SecurityExceptions, but surely that won't happen if C:\TEST doesn't exist? – Questionless

@OxA3 If you don't have right to create the directory, the else branch is executed. – Pavlov

There's also mkdirs which will create parent folders too: docs.oracle.com/javase/7/docs/api/java/io/File.html#mkdirs() – Hagiarchy

Please don't use catch(Exception e){e.printStackTrace()}: today.java.net/article/2006/04/04/… – Allen

Answer 2

Call File.mkdir, like this:

new File(path).mkdir();

Pennsylvanian

Answer 3

With Java 7 and newer you can use the static Files.createDirectory() method of the java.nio.file.Files class along with Paths.get.

Files.createDirectory(Paths.get("/path/to/folder"));

The method Files.createDirectories() also creates parent directories if these do not exist.

Indistinguishable

Files.createDirectories() will also silently ignore already existing directories. – Isosceles

@Isosceles This is only valid for parent directories. If the main directory (in this case "folder") already exists, it will thrown an exception (see also javadoc). – Cyanamide

Answer 4

Use mkdir():

new File('/path/to/folder').mkdir();

Synchronous

Answer 5

Use the mkdir method on the File class:

https://docs.oracle.com/javase/1.5.0/docs/api/java/io/File.html#mkdir%28%29

Stamp

Answer 6

Using Java 8:

Files.createDirectories(Paths.get("/path/to/folder"));

Same:

new File("/path/to/folder").mkdirs();

Or

Files.createDirectory(Paths.get("/path/to/folder"));

Same:

new File("/path/to/folder").mkdir();

Stylite

Answer 7

Better to use mkdirs as:

new File("dirPath/").mkdirs();

mkdirs: also create parent directories if these do not exist.

ps: don't forget the ending / that shows explicitly you want to make a directory.

Bruni

Answer 8

The following code would be helpful for the creation of single or multiple directories:

import java.io.File;

public class CreateSingleOrMultipleDirectory{
    public static void main(String[] args) {
//To create single directory
        File file = new File("D:\\Test");
        if (!file.exists()) {
            if (file.mkdir()) {
                System.out.println("Folder/Directory is created successfully");
            } else {
                System.out.println("Directory/Folder creation failed!!!");
            }
        }
//To create multiple directories
        File files = new File("D:\\Test1\\Test2\\Test3");
        if (!files.exists()) {
            if (files.mkdirs()) {
                System.out.println("Multiple directories are created successfully");
            } else {
                System.out.println("Failed to create multiple directories!!!");
            }
        }
    }
}

Littlest

You can follow the link also: roseindia.net/java/beginners/java-create-directory.shtml – Littlest