stampa

String format = "%-15s %-30s %-30s\n";
                    System.out.format(format, "Nome", "Cognome", "Email");

                    ResultSet r= statement.executeQuery("select distinct Nome, Cognome, Email from partecipante where partecipante.CF!= all (select cliente.CF from cliente);");
                    while (r.next()==true)
                        System.out.format(format, r.getString(1), r.getString(2), r.getString(3));
                    break;