Hi everyone,
I have got this simple piece of code:

1. import java.io.*;
2. void setup(){
3.     try{
4.         BufferedReader fread = new BufferedReader(new FileReader("text.txt"));
5. 
   
6.         String c;
7.         String s = null;
8.         do{
9.             c = fread.readLine();
10.             if (c != null){
11.                 System.out.println(c);
12.                 s = c;
13.             }
14.         }while(c != null);
15. 
    
16.         System.out.println("\n"+s);
17. 
    
18.         fread.close();
19.     } catch (IOException e){
20.         System.err.println(e); 
21.     }
22. }

Running this I get the

java.io.FileNotFoundException: text.txt (Impossibile trovare il file specificato)

error

text.txt is in the data folder but I get the same error if I move it to the project root folder,
Why does it happen this?

How can I fix?

Thank you in advance.