Lab 24

Fleet of Vehicles

Objective:

Write a classes that represents a vehicle system

First download the driver and put it in your project

• DO NOT ALTER THE DRIVER!

Regarding .equals(): Just go ahead and take a Vehicle/Car/Truck parameter… this is not really the normal way: see https://www.sitepoint.com/implement-javas-equals-method-correctly

Write a class file called Vehicle

• Some of the attributes are
• Manufacturer’s name
• Number of Cylinders (must be greater than 0)
• Owner’s name
• Create the following Constructors
• Default – sets everything to default values
• Parameterized Constructor
• Check for valid values
• Accessors and Mutators for each variable
• MAKE SURE THE MUTATORS CHECK FOR VALID VALUES!
• Create the following Methods
• equals – takes in another instance of a Vehicle and returns true only if the names and the number of cylinders are equal
• toString – returns a String that contains the Manufacturer’s name, number of cylinders, and the owners name

Write another class Truck which is a Vehicle

• Some of the attributes of Truck are
• Load capacity: a nonnegative number of tons represented by a decimal number
• Towing capacity: a nonnegative number of tons represented by a decimal
• Create the following constructors
• Default – sets everything to default values
• This includes calling the Vehicle’s default constructor
• Parameterized Constructor
• This must also take in via parameter the manufacturer’s name, number of cylinders, and the owner’s name in addition to the load and towing capacity.
• Accessors and Mutators for each variable
• MAKE SURE THE MUTATORS CHECK FOR VALID VALUES!
• Create the following methods
• equals – This should override the vehicle’s equals method return true if all the properties of vehicle and truck are equal
• toString – This should also override the vehicle’s toString method and also return the Vehicle’s toString along with the towing and load capacity

Write another class Car which is a Vehicle

• Some of the attributes of Truck are
• Gas Mileage: a nonnegative number of gallons represented by a decimal number
• Number of passengers: a nonnegative number of passengers  represented by a whole number
• Create the following constructors
• Default – sets everything to default values
• This includes calling the Vehicle’s default constructor
• Parameterized Constructor
• This must also take in via parameter the manufacturer’s name, number of cylinders, and the owner’s name in addition to the load and towing capacity.
• Accessors and Mutators for each variable
• MAKE SURE THE MUTATORS CHECK FOR VALID VALUES!
• Create the following methods
• equals – This should override the vehicle’s equals method return true if all the properties of vehicle and car are equal
• toString – This should also override the vehicle’s toString method and also return the Vehicle’s toString along with the gas mileage and number of passengers

Example Dialog:

Welcome to the fleet manager

Enter 1: to add a Vehicle

Enter 2: to remove a Vehicle

Enter 9 to quit

1

Enter 1: if it is a car

Enter 2: if it is a truck

Enter 3: if it is unclassified

1

Enter the manufacturer's name

Nissan

Enter the number of cylinders

6

Enter the owner's name

JJ

Enter the car's gas mileage

29

Enter the number of passengers

5

The Fleet currently

Manufacturer's Name: Nissan

Number Of Cylinders: 6

Owner's Name: JJ

Gas Mileage: 29.0

Number of Passengers: 5

Enter 1: to add a Vehicle

Enter 2: to remove a Vehicle

Enter 9 to quit

1

Enter 1: if it is a car

Enter 2: if it is a truck

Enter 3: if it is unclassified

2

Enter the manufacturer's name

Chevy

Enter the number of cylinders

8

Enter the owner's name

Eddie

Enter the truck's load capacity

1

Enter the truck's towing capacity

2

The Fleet currently

Manufacturer's Name: Nissan

Number Of Cylinders: 6

Owner's Name: JJ

Gas Mileage: 29.0

Number of Passengers: 5

Manufacturer's Name: Chevy

Number Of Cylinders: 8

Owner's Name: Eddie

Towing Capacity: 2.0

Load Capacity: 1.0

Enter 1: to add a Vehicle

Enter 2: to remove a Vehicle

Enter 9 to quit

1

Enter 1: if it is a car

Enter 2: if it is a truck

Enter 3: if it is unclassified

3

Enter the manufacturer's name

Ford

Enter the number of cylinders

6

Enter the owner's name

Bob

The Fleet currently

Manufacturer's Name: Nissan

Number Of Cylinders: 6

Owner's Name: JJ

Gas Mileage: 29.0

Number of Passengers: 5

Manufacturer's Name: Chevy

Number Of Cylinders: 8

Owner's Name: Eddie

Towing Capacity: 2.0

Load Capacity: 1.0

Manufacturer's Name: Ford

Number Of Cylinders: 6

Owner's Name: Bob

Enter 1: to add a Vehicle

Enter 2: to remove a Vehicle

Enter 9 to quit

2

Enter 1: if it is a car

Enter 2: if it is a truck

Enter 3: if it is unclassified

2

Enter the manufacturer's name

Chevy

Enter the number of cylinders

8

Enter the owner's name

Eddie

Enter the truck's load capacity

1

Enter the truck's towing capacity

2

The Fleet currently

Manufacturer's Name: Nissan

Number Of Cylinders: 6

Owner's Name: JJ

Gas Mileage: 29.0

Number of Passengers: 5

Manufacturer's Name: Ford

Number Of Cylinders: 6

Owner's Name: Bob

Enter 1: to add a Vehicle

Enter 2: to remove a Vehicle

Enter 9 to quit

9

The Fleet currently

Manufacturer's Name: Nissan

Number Of Cylinders: 6

Owner's Name: JJ

Gas Mileage: 29.0

Number of Passengers: 5

Manufacturer's Name: Ford

Number Of Cylinders: 6

Owner's Name: Bob

Goodbye

Lab Report Questions:

1. Describe inheritance.
2. Describe polymorphism.

Finally:

Upload file to the dropbox