Java File mkdirs() method example

public boolean mkdirs()

This method returns boolean, true if and only if the directory was created, along with all necessary parent directories; false otherwise.

Requires Java 1.0 and up

Below is a java code demonstrates the use of mkdirs() method of File class. The example presented might be simple however it shows the behaviour of the mkdirs() method of File class. Basically we called this method and we put a check on the returned value to check if the pathname specified has been created successfully or not.

The example provided below shows that on the first run, the file has been created successfully while on the second run it failed. That is because the directory structure is already created on the first run, thus succeeding run will definitely fail as describe on the earlier part of this document.

package com.javatutorialhq.java.examples;

import java.io.File;

/*
 * This example source code demonstrates the use of  
 * mkdir() method of File class.
 * 
 */

public class FileMkdirsExample {

	public static void main(String[] args) {
		
		// initialize File object
		File file = new File("C:javatutorialhqtest_folderinputtest1");		
		// check if the pathname already exists
		// if not create it
		if(!file.exists()){
			// create the full path name
			boolean result = file.mkdirs();
			if(result){
				System.out.println("Successfully created "+file.getAbsolutePath());
			}
			else{
				System.out.println("Failed creating "+file.getAbsolutePath());
			}
		}else{
			System.out.println("Pathname already exists");
		}
	}
}

Below is the sample output when you run the above example.

• Java File Class Tutorial
• Java Tutorial

• Oracle Java Documentation