JcomboBox conexão banco de dados

try{   
                                   Class.forName("com.mysql.jdbc.Driver");  
                                    con = DriverManager.getConnection("jdbc:mysql://localhost:3306/localiza","root","123");
                                    Statement stm;
                                    stm = con.createStatement();
                                    res = stm.executeQuery("Select  nome do campo do Banco");                                                                            while(res.next()){
                                            jComboBox.addItem(res.getString(1));
                                            break;
                                        }
                                }