How to delete given file in Java?



Problem Description :


Write a program in Java that deletes a given file.

Java program that deletes a given file.
How to delete a given file in Java?

Concept :


Here I am assuming that file is present in current working directory. For deleting given file we need to use below method of File class that is present in java.io.* package.

public boolean delete()

Java Program :


package com.javamultiplex.FileHandling;

import java.io.File;
import java.io.IOException;
import java.util.Scanner;


/**
 * @author Rohit Agarwal
 * @category File Handling
 * @problem How to delete given file in Java?
 *
 */
public class DeleteFile {

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

  Scanner input = null;
  try {
   input = new Scanner(System.in);
   System.out.println("Enter file name with extension : ");
   String fileName = input.nextLine();
   if (isValidFileName(fileName)) {
    //file is present in current working directory.
    File file = new File(fileName);
    if (file.exists()) {
     boolean deleted = file.delete();
     if (deleted) {
      System.out.println("File is deleted successfully.");
     } else {
      System.out.println("Some error occured. Try again!!");
     }

    } else {
     System.out.println("File is not present in current directory.");
    }
   } else {
    System.out.println("File name is not valid.");
   }
  } finally {
   if (input != null) {
    input.close();
   }
  }

 }
 
 private static boolean isValidFileName(String fileName) {
  
  //Regular expression that checks whether given file name is valid or not.
  String pattern = "^.+\\..+$";
  boolean result = false;
  if (fileName.matches(pattern)) {
   result = true;
  }
  return result;
 }
}



Output :


Output of Java program that deletes a given file - case 1
Output - Deletion of given file

After deletion of "demo.txt" file

Output of Java program that deletes a given file - case 2
Output - After deletion of file


References :


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

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

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


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, delete given file, if else, Scanner, File, String, Regular Expressions, java.io, delete(), exists().

About Author:

I am simple guy with lot of ambitions. My main motive is to share whatever knowledge I have related to programming. With me you can easily learn how to solve any programming problem in Java.You can connect with me on social networking sites also.


Let's Get Connected: Linkedin | Facebook |

How to delete given file in Java? How to delete given file in Java? Reviewed by Rohit Agarwal on 4/20/2017 Rating: 5

No comments:

Please provide your valuable comments. If you have any suggestion please share with me I will work on it and if you have any question or doubt please ask, don't hesitate. I am your friend, i will clarify all your doubts.

Powered by Blogger.