How to create new folder in given disk drive in Java?



Problem Statement :


Write a program in Java that creates a new directory (folder) in given disk drive.


Java program that creates a new directory in given disk drive.
Create a new directory in given disk drive in Java

Concept :


We need to use mkdir() method of File class that is present in java.io.* package. We are using below File constructor to create File class instance.
File file=new File(directorypath);

Algorithm :


  1. Check whether given directory exists in given drive or not?
  2. If directory exists then no need to create new directory otherwise create directory.


Java Program :


package com.javamultiplex.filehandling;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.InputMismatchException;
import java.util.Scanner;

/**
 * 
 * @author Rohit Agarwal
 * @category File Handling
 * @problem How to create directory in given drive?
 *
 */
public class CreateDirectory {

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

  Scanner input = null;
  BufferedReader br = null;

  try {
   int result = 0;
   input = new Scanner(System.in);
   br = new BufferedReader(new InputStreamReader(System.in));
   System.out.println("Enter drive letter : ");
   char ch = input.next(".").charAt(0);
   System.out.println("Enter Directory (folder) name : ");
   String directoryName = br.readLine();
   result = createNewDirectory(ch, directoryName);
   if (result == 1) {
    System.out.println("Directory " + directoryName + " successfully created in " + ch + " drive.");
   } else if (result == 0) {
    System.out.println("Error occured, path doesn't exist.");
   }

  } catch (InputMismatchException e) {
   System.out.println("Enter drive letter correctly!");
  } finally {
   if (input != null) {
    input.close();
   }
   if (br != null) {
    br.close();
   }
  }
 }

 private static int createNewDirectory(char ch, String directoryName) {

  // Creating File reference.
  File file = new File(ch + ":\\" + directoryName);
  boolean result = false;
  int flag = 0;
  // Checking whether directory exist or not in given path.
  if (file.exists()) {
   System.out.println("Directory " + directoryName + " already exist in " + ch + " drive.");
   flag = 2;
  } else {
   result = file.mkdir();
   if (result) {
    flag = 1;
   }
  }
  return flag;
 }

}


Output :


Output of Java program that creates a new directory in given disk drive.
Output - How to create a new directory in given disk drive in Java?


After the execution of above program
given directory present in given drive
directoy "javamultiplex" in d drive


References
:


https://docs.oracle.com/javase/7/docs/api/java/io/File.html#exists()

https://docs.oracle.com/javase/7/docs/api/java/io/File.html#mkdir()

https://docs.oracle.com/javase/7/docs/api/java/lang/String.html

https://en.wikipedia.org/wiki/Regular_expression

Thank you friends, I hope you have clearly understood the solution of this problem. If you have any doubt, suggestion or query please feel free to comment below. You can also discuss this solution in our forum.

Tags : File Handling, Create new directory, if else, Scanner, BufferedReader, File, String, Regular Expressions, InputStreamReader, java.io, mkdir(), exists().

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How to create new folder in given disk drive in Java? How to create new folder in given disk drive in Java? Reviewed by Rohit Agarwal on 3/24/2017 Rating: 5

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