How to delete a file with java (see mine code)

This program should delete cookedBooks.txt, but it doesnt. I created cookedBooks.txt in a folder. Can somebody push me in the right directions.

Code:

---

import java.io.File;
import static java.lang.System.out;
import java.util.Scanner;

class DeleteEvidence {
       
       
       
        public static void main(String[] args) {

                File evidence = new File("cookedBooks.txt");
                Scanner keyboard = new Scanner(System.in);
                char reply;

                do        {
                        System.out.println("Delete Evidence? (Y/N) ");
                        reply =
                        keyboard.findWithinHorizon(".",0).charAt(0);
                } while (reply != 'y' && reply != 'n');

               
                if (reply == 'y') {
                        System.out.println("here we go");
                evidence.delete();
                System.out.println("Has been deleted");

        }else{
                System.out.println("Asking");

        }
  }
}

---

You need to place the file to be deleted in the main project folder outside the "src" folder.