Labs

  1. We will be creating and testing a class to model a Car.

  2. Create a Car class. It will have fields for

    • make
    • model
    • color
    • numberOfWheels
    • purchasePrice

    Add a getCarData() method that returns a String with all of the car data.

    Add a displayCar() method that prints the object's data to the screen. (This will be very similar to getCarData. In fact, it is better in terms of design if displayCar calls getCarData and prints the return value to the screen.)

    (Solution: Car.java)

  3. Create a CarTester class.

    • In its main method, create two Car objects (using new). Initialize all fields.
    • In main, call displayCar and visually verify that the output is what you expect.
    • Also call getCarData for each Car and print its return value to the screen.

    (Solution: CarTester.java)

  4. Create a DMVSimulator class. It will:

  5. Prompt the user to enter data for a Car.
  6. Upon entry of all data, store the data in a new Car instance. Then display the Car's information to the screen.
  7. Prompt the user to calculate tax (C) or exit (E)
    • If the user types C, calculate tax, where tax = purchasePrice * 0.01 * numberOfWheels. Then the program ends.
    • If the user types E, print an exit message to the screen, and end the program with the command System.exit(0).
    • If the user types a different command, prompt the user again. Keep prompting until the user enters C or E.

(Solution: DMVSimulator.java)

  1. We will create a thermometer. The formulas for Celsius and Fahrenheit are 

    celsius = (fahrenheit - 32) / 1.8
fahrenheit = (celsius * 1.8) + 32

  2. Create a Thermometer class which has

    • Fields:

      char scale - (C or F).

      double currentTemp - the temperature reading.

    • Methods:

      getTempAsCelsius - return a temperature based on the thermometer's scale.

      getTempAsFahrenheit - return a temperature based on the thermometer's scale.

    (Solution: Thermometer.java)

  3. Create a ThermometerDriver class. It will prompt a user for a temperature and scale, then print the temperature (in both Celsius and Fahrenheit) to the screen.

    (Hint: Remember that the String "C" and char 'C' are not the same. Use the String method charAt(0) to convert the String "C" or "F" into a char.)

    (Solution: ThermometerDriver.java)

    Optional: Place the user interaction in an infinite loop. If the user types Q for the scale, exit the program.

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