A05

Due Date: Friday, 26 February 2021
File(s) to be submitted: Vehicle.java, Truck.java
Sample Output: SampleOutput.html
Starter Files:

• Person.java
• TruckDriver.java

Trucks and Other Vehicles (Inheritance)

Synopsis

Create a Vehicle class and a Truck class derived from it. Use the provided driver program to test your classes. The driver program does no input -- other than requiring the user to press the Enter key once. It merely prints out some messages, including (eventually) PASS/FAIL messages about some tests it is carrying out.

When you look at the code for the driver program, you will notice that quite a lot of it is commented out. You can activate parts of the code by deleting the indicated lines. Do not revise the driver program except to delete the lines indicated. Only delete those lines when you've completed created the corresponding class (along with stubs for the required methods). At that point you should be able to compile and run the driver program and see whether your methods are working properly.

The sections of TruckDriver are for:

1. the Vehicle class
2. the Truck class
3. error checking on classes In general, methods should throw IllegalArgumentExceptions when given illegal arguments.

Details

For this assignment you need to create two files. One represents a generic vehicle, and the other a truck -- which is a particular kind of vehicle. Your Vehicle class must record the following information:

• A make -- which is the name of the manufacturer (such as "Ford", "GM", "Toyota", ...).
• A number of doors -- which is just what it says. Only positive numbers are allowed. (Note that vehicles that advertise themselves to have "two and a half doors" actually have three doors!)
• An owner -- who is a Person (the class has been provided for you).

• A load limit -- the weight (in tonnes) that it can carry. This number may include fractional tonnes. This number must be positive.
• A tow limit -- the weight (again in tonnes) that it can pull. This number may also include fractional tonnes. This number must be positive.

• A constructor for each class that accepts initial values for each of the properties of that object. (You can include more constructors than that, but you don't need to!)
• A getter for each field.
• A setter for the owner field. (The other fields are fixed. You should declare them as final.)
• A toString method for the Vehicle class. It must return a String showing the owner, the number of doors, and the make of the vehicle -- for example, "Bob's 4-door Tata".
  If the owner is null, then the String should say "no one's" instead of "null". For example, "no one's 4-door Tata".
• An equals method for the Truck class. This method must over-ride the equals method from Object, not over-load it. Two Trucks are equal if they are equal in every field other than their owner, and unequal otherwise. A Truck is unequal to any other kind of thing.