In Java, we can use the NIO Files.createDirectory to create a directory or Files.createDirectories to create a directory including all nonexistent parent directories.
try {
Path path = Paths.get("/home/mkyong/a/b/c/");
//java.nio.file.Files;
Files.createDirectories(path);
System.out.println("Directory is created!");
} catch (IOException e) {
System.err.println("Failed to create directory!" + e.getMessage());
}
1. Create Directory – Java NIO
1.1 We can use Files.createDirectory to create a directory.
- If the parent directories not exist, throws
NoSuchFileException. - If the directory exists, throws
FileAlreadyExistsException. - If IO errors, throws
IOException.
Path path = Paths.get("/home/mkyong/test2/");
Files.createDirectory(path);
1.2 We can use Files.createDirectories creates a directory including all nonexistent parent directories.
- If the parent directories not exist, create it first.
- If the directory exists, no exception thrown.
- If IO errors, throws
IOException
Path path = Paths.get("/home/mkyong/test2/test3/test4/");
Files.createDirectories(path);
1.3 This example uses Files.createDirectories to create a directory /test4/ including all nonexistent parent directories /test2/test3/.
package com.mkyong.io.directory;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
public class DirectoryCreate1 {
public static void main(String[] args) {
String dir = "/home/mkyong/test2/test3/test4/";
try {
Path path = Paths.get(file);
Files.createDirectories(path);
System.out.println("Directory is created!");
//Files.createDirectory(path);
} catch (IOException e) {
System.err.println("Failed to create directory!" + e.getMessage());
}
}
}
2. Create Directory – Legacy IO
For legacy IO java.io.File, the similar methods are file.mkdir() to create a directory, and file.mkdirs() to create a directory including all nonexistent parent directories.
Both file.mkdir() and file.mkdirs() returns a boolean, true if success to create the directory, fail otherwise, no exception thrown.
package com.mkyong.io.directory;
import java.io.File;
public class DirectoryCreate2 {
public static void main(String[] args) {
String dir = "/home/mkyong/test2/test3/test4/";
File file = new File(dir);
// true if the directory was created, false otherwise
if (file.mkdirs()) {
System.out.println("Directory is created!");
} else {
System.out.println("Failed to create directory!");
}
}
}
In legacy IO, the lack of exception thrown in creating directory makes developers very hard to debug or understand why we cannot create a directory, and this is one of the reasons Java releases a new java.nio.Files to throw a proper exception.
Download Source Code
$ git clone https://github.com/mkyong/core-java
$ cd java-io
So useful.
How to set the Dir path to choosed Directory with “directoryChooser”
For example a installer, where the user can choose the directory.
Code snippet 1.3, do you mean:
Path path = Paths.get(dir);
instead of:
Path path = Paths.get(file);
Very useful.
How can you create a file on your desktop? (I am using Windows and i am from Germany)
Files.writeorBufferWriterhttps://mkyong.com/java/how-to-create-a-file-in-java/
how can you reply to someone 18 months after the original post thats terrible. You might as well not have a website.
i want create folder on server like(http://localhost:8084/Test). how to create?
i use this type
File inFile = new File(“http://localhost:8084/Test/web/images”);
boolean b = inFile.mkdir();
its identify that : http:localhost:8084Testwebimeges
You need to put the code inside the web server.
replying to someone after 4 and half years. Were you in prison or something? Or is it a total lack of professionalism and you just dont care….Unbelievable.
Just a correction:
File files = new File(“C:\Directory2\Sub2\Sub-Sub2”);
if (files.exists()) { <- should be !files.exists()
if (files.mkdirs()) {
System.out.println("Multiple directories are created!");
} else {
System.out.println("Failed to create multiple directories!");
}
}
Thanks for your feedback, we updated the article with more examples.
Thanks, nice post
Hi mr.mkyong.I like your site.Your posts are useful for my java knowledge……
Your examples are great and very helpful. Thank you!
It is just basic example to get you started.
By learning the example you know what library that you need to use.
From there i assume that you will be exploring the library on you own and read the API.
Very easy program to create folder at specified path. Thanks
hi
you are missing an exclamation mark in the multiple directories
it should be
File files = new File("C:\\Directory2\\Sub2\\Sub-Sub2"); if (<b>!</b>files.exists()) { if (files.mkdirs()) {Could you delete other two posts thanks 😉
Thanks for your feedback. We updated the article, the feedback is irrelevant now.
Really awesome site for java learner but filling the lackings of the tutorial for javax.swing.Its request to sir consider our demand.
thanks very much
Very Useful. Thank you very much
All of your posts are of great help. Thanks. Continue writing more tech posts 🙂
i like it but give some video to how to create directory
Hi Mkyoung,
Thank you for your posts. These are really helpful.
Regards
Anupam