updateField

/**
     * Updates a field of a Car
     *
     * @param name the search string for the Car
     * @param field the field which is to be updated
     * @param val the new Value for the field
     */


    //Set the field for the car with the given name and year.
    //Your function should support updating all fields except the car name and maker name.
    public void updateField(String name,int year, String field, String val){
        //TODO: Fill in

        Iterator<Car> carIter = cars.iterator();
        Car car;
        while (carIter.hasNext())
                {
                    car = (Car) carIter.next();
                    if (car.getName().equals(name))
                        //if (car.getYear().equals(year)) Cannot invoke equals(int) on the primitive type int
                        if (car.getYear()==year)
                        {
                            switch(field)
                            {

                               case "mpg":
                                {
                                    car.setMpg(Integer.parseInt(val));
                                }


                                case "power":
                                {
                                    car.setPower(Integer.parseInt(val));
                                }


                                case "year":
                                {
                                    car.setYear(Integer.parseInt(val));
                                }


                                case "region":
                                {
                                    car.setRegion(Integer.parseInt(val));
                                }


                                case "cylinders":
                                {
                                    car.setCylinders(Integer.parseInt(val));
                                }

                           }

                        }
                }
    }