Create new file & folder (directory) in java (example)

Leave a Comment / By Yogesh / December 18, 2016

Given a path in java.
- Create a new folder or directory using File class.
- Create a file using File class
File class has following methods to create file & directory in java.

No.	File Api	Description
1	boolean mkdir()	Creates the directory named by this abstract pathname.
2	boolean mkdirs()	Creates the directory named by this abstract pathname, including any necessary but nonexistent parent directories.
3	boolean createNewFile()	Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.

We will create directory in non existed path using mkdir api.
Also, we will create new directory & file using mkdir & createNewFile respectively.

Program: create new file & folder (directory) – java

package org.learn.io;
 
import java.io.File;
import java.io.IOException;
 
public class CreateFileDirectoryJava {
 
    public static void main(String[] args) throws IOException {
 
        String dirPath = "C:\\nonExistedDirectory\\directory";
        String newDirName = "dir1";
        String newFileName = "file1.txt";
        String anotherNewFileName = "file2.txt";
 
        File newDirectory = new File(dirPath);
        //Create directory for non existed path.
        boolean isCreated = newDirectory.mkdirs();
        if (isCreated) {
            System.out.printf("1. Successfully created directories, path:%s",
                    newDirectory.getCanonicalPath());
        } else if (newDirectory.exists()) {
            System.out.printf("1. Directory path already exist, path:%s",
                    newDirectory.getCanonicalPath());
        } else {
            System.out.println("1. Unable to create directory");
            return;
        }
 
        //Create file under new directory path C:\newDirectory\directory
        File newFile = new File(dirPath + File.separator + newFileName);
        //Create new file under specified directory
        isCreated = newFile.createNewFile();
        if (isCreated) {
            System.out.printf("\n2. Successfully created new file, path:%s",
                    newFile.getCanonicalPath());
        } else { //File may already exist
            System.out.printf("\n2. Unable to create new file");
        }
 
        //Create new directory under C:\nonExistedDirectory\directory
        File oneMoreDirectory = new File(dirPath + File.separator + newDirName);
        //Create directory for existed path.
        isCreated = oneMoreDirectory.mkdir();
        if (isCreated) {
            System.out.printf("\n3. Successfully created new directory, path:%s",
                    oneMoreDirectory.getCanonicalPath());
        } else { //Directory may already exist
            System.out.printf("\n3. Unable to create directory");
        }
 
        //Create file under new directory path C:\newDirectory\directory
        File anotherNewFile = new File(oneMoreDirectory + File.separator + anotherNewFileName);
 
        //Create new file under specified directory
        isCreated = anotherNewFile.createNewFile();
        if (isCreated) {
            System.out.printf("\n4. Successfully created new file, path:%s",
                    anotherNewFile.getCanonicalPath());
        } else { //File may already exist
            System.out.printf("\n4. Unable to create new file");
        }
    }
}

Output: create new file & directory (folder) in java

Successfully created directories, path:C:\nonExistedDirectory\directory
Successfully created new file, path:C:\nonExistedDirectory\directory\file1.txt
Successfully created new directory, path:C:\nonExistedDirectory\directory\dir1
Successfully created new file, path:C:\nonExistedDirectory\directory\dir1\file2.txt