how to execute jdbc query?

Question

I'm following a tutorial on JDBC and I wrote this code:

package jc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.sql.Statement;
import java.sql.ResultSet;

public class Jc {

    public static void main(String[] args) {
        Jc exec = new Jc();
        exec.createConnection();
    }

    void createConnection(){
        try {
            Class.forName("com.mysql.jdbc.Driver");
            System.out.println("done");
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/adherants", "root", "user");
            System.out.println("done");
            Statement stmt = con.createStatement();
            System.out.println("done");
            ResultSet rs = stmt.executeQuery("SELECT * FROM persone");
            System.out.println("done");
            while(rs.next()){
                String CIN = rs.getString("CIN");
                System.out.println(CIN);
            }
            System.out.println("done");
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(Jc.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(Jc.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

}

However, I always get these output messages:

More specifications:

1. IDE: Apache NetBeans 11.3
2. database management system: MySQL