Rename the File or Directory in Java

Introduction

In this section, you will see that how a file or directory is renamed. This program illustrates you the procedure of doing so. Through this program you can easily rename any type of the file or directory. If you mention the directory (path) with the new file or directory name to rename the old file or directory which has to be renamed then the file or directory will be moved from it's own directory to the specified new directory otherwise file or directory will be moved from it's own directory to the default directory where your program has been running. This program also tells you about the availability of the specified file or directory which has to be renamed.

The method renameTo(new_file_instance) can be used to rename the appropriate file or directory. Method renameTo() renames the specified file or directory and returns a boolean value (true or false). Syntax of the renameTo() method used in this program :

oldfile.renameTo(newfile)

oldfile : oldfile is the created instance of the File class for holding the specified file or directory name which has to be renamed in the file format.
newfile : newfile is also the instance of File class, which is the new name of file or directory

There are no any typical logic has been used in this program. Simply this program first reads the file or directory name which has to be renamed and then check whether the specified file or directory exists or not. If the specified file or directory exists then the program renames that file or directory into the name specified as parameter to the renameTo() method.

Here is the code of the program :


import java.io.*;

public class RenameFileOrDir{ public static void main(String[] args) throws IOException{ BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Please enter the file or directory name which has to be Renamed : "); String old_name = in.readLine(); File oldfile = new File(old_name); if(!oldfile.exists()) { System.out.println("File or directory does not exist."); System.exit(0); } System.out.print("please enter the new file or directory name : "); String new_name = in.readLine(); File newfile = new File(new_name); System.out.println("Old File or directory name : "+ oldfile); System.out.println("New File or directory name : "+ newfile); boolean Rename = oldfile.renameTo(newfile);

if(!Rename) { System.out.println("File or directory does not rename successfully."); System.exit(0); } else { System.out.println("File or directory rename is successfully."); } } }

Download this example.

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