toi la vraimeeeeeeeeeeeeeeeeeeeent tchiiiiiiiiiiip !!!!

 String sql = "select * from Truc";
        PreparedStatement stat = con.prepareStatement(sql);
       // stat.executeUpdate();
        ResultSet rs = stat.executeQuery(sql);
        int id;
        String nom;
        while (rs.next()) {
            id = rs.getInt(1);
            nom = rs.getString(2);
            System.out.println(id+"  "+nom);
        }