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Showing content from https://www.tutorialspoint.com/javaexamples/file_rename.htm below:

How to rename a file in Java

How to rename a file?

This example demonstrates how to renaming a file using oldName.renameTo(newName) method of File class.

import java.io.File;

public class Main {
   public static void main(String[] args) {
      File oldName = new File("C:/program.txt");
      File newName = new File("C:/java.txt");
      
      if(oldName.renameTo(newName)) {
         System.out.println("renamed");
      } else {
         System.out.println("Error");
      }
   }
}

The above code sample will produce the following result.To test this example, first create a file 'program.txt' in 'C' drive.

renamed

The following is another example of rename a file in java

import java.io.File;

public class RenameFileExample { 
   public static void main(String[] args) { 
      File oldfile = new File("C:/oldfile_name.txt");
      File newfile = new File("C:/newfile_name.txt");

      if(oldfile.renameTo(newfile)) {
         System.out.println("File name changed succesful");
      } else {
         System.out.println("Rename failed");
      } 
   }
}

The above code sample will produce the following result. To test this example, first create a file 'oldfile_name.txt' in 'C' drive.

File name changed succesful

java_files.htm

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