Assignment 2: Abstract Class and Inheritance

Submitted By:

Marc Edison Estaca
Paule, Lexter
Realica, Justin
Dang, Dylan

Date Completed

October 26, 2025

Scenario:

A local company, DriveMasters, has hired you to implement a system to manage their vehicle inventory more efficiently. They want a system that allows both employees and customers to find, list and purchase vehicles. The company has provided you with a data file containing a sample list of vehicles. The data file contains five types of vehicles: Sedan, SUV, Hatchback, Pickup Truck and Hybrid cars. Each vehicle is uniquely identified using CarID, and information about each type of vehicle is described in the formatting section.

Vehicle Details

Data Formatting

• Each of the following vehicle types is represented differently in the supplied vehicles.txt file.
• Each line in the file represents a different vehicle and each piece of information for a vehicle is separated by a semi-colon.
• The first digit of the CarID indicates the type of the vehicle. Each CarID is 9 digits long.

Sedan

• The first digit of the CarID for Sedan is 1.
• Sedan have: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;TrunkSize
• The trunk sizes can be either:
  • Large/spacious trunk (L),
  • Small (S)
  • Moderate (M).
• Each Sedan is represented in the vehicles.txt file as follows: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;TrunkSize Example: 121587921;Sedan;Luxury;180;50.0;5;2020;AWD;25000;8;L

Hatchback

• The first digit of the CarID for hatchback is 2.
• Hatchback have: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;HatchType
• Hatch Type can be either:
  • Standard Liftgate (S),
  • Split Liftgate(T)
  • Power Liftgate (P)
• Each Hatchback is represented in the vehicles.txt file as follows: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;HatchType Example: 263914872;Hatchback;Economy;160;45.0;5;2019;FWD;18000;10;P

SUV

• The first digit of the CarID for SUV is 3.
• SUV have Drivetrain: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity
• The Drive terrain can be either:
  • All wheel drive (AWD)
  • Four wheel drive (4WD)
  • Front-Wheel Drive (FWD)
• Each SUV is represented in the vehicles.txt file as follows:
• CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity Example: 374512039;SUV;Compact;160;70.0;7;2018;AWD;35000;4

Hybrid

• The first digit of the CarID for Hybrid is 4 or 5.
• Hybrid have Powertrain Type: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;PowerTrain; ElectricRange;
• Power Train can be either:
  • Series Hybrid (E)
  • Parallel Hybrid (A)
  • Plug-in Hybrid (PHEV)
• Each Hybrid is represented in the vehicles.txt file as follows:
• CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;PowerTrain ElectricRange; Example: 596387204;Hybrid;Crossover;180;45.0;5;2022;AWD;28000;6;A;40

Pickup Truck

• The first digit of the CarID for Pickup Truck is 6.
• Pickup Truck have Cargo Beds: CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;CargoBeds; CargoCapacity
• Cargo Beds can be either:
  • Short Bed (SB)
  • Extended Bed (EB)
  • Dump Bed (DB)
• Each Pickup Truck is represented in the vehicles.txt file as follows:
• CarID;VehicleType;Subtype;Speed;Fuel;Seats;Year;Drivetrain;Price;Quantity;CargoBeds; CargoCapacity Example: 641289354;Pickup Truck;Full-Size;140;80.0;2;2021;4WD;30000;10;EB;1500

Program Details

The fact that the data formatting is different for each type of vehicles adds a level of complexity to program development. Creating a class hierarchy is required:

• Determine the attributes that are shared between the vehicles types and create a Vehicle class containing them. NOTE: The Vehicle class cannot be instantiated and must be a super-class.
• Create the following classes such that each one inherits the Vehicle class and is located in the program’s problemdomain folder:
  • Sedan
  • Hatchback
  • SUV
  • Hybrid
  • Pickup Truck
• Ensure that each of these classes has a user-defined constructor that assigns the appropriate attributes.
• Override the toString() method in each one of these classes, so that the data is in a human readable form.
• The attributes should be displayed using vertical headers. Along with the functionality mentioned above, include the following methods in your program:
• A method that parses the vehicles.txt file into a single list.
  • The list must be able to contain all vehicle types (sedan, hatchback, suv, hybrid and pickup truck).
  • Use the first digit of the CarID to determine what valid type of vehicle needs to be created (see the Vehicle Details section for more information).
• A method that allows a customer to puchase a vehicle.
  • The customer is prompted to enter the CarID of a vehicle. If the entered CarID does not match, the program will inform the customer with an error message. If the CarID matches, the program checks the vehicle’s availability. If there is a vehicle available, the available count will be decremented and the vehicle information will be displayed. Otherwise, the customer will be informed the vehicle is not available.
• A method that prompts the customer to enter a vehicle type. The program performs a case-insensitive search of vehicles that have the same vehicle type, and displays them.
• A method that prompts the customer to first enter a vehicle type, then enter a respective sub type. The program performs a case-insensitive search of vehicles that have the same vehicle type and sub type, and displays them.
• A method that prompts a user to enter a number, and the program then displays that number of random vehicles. The vehicles can be of any type.
• A method that persist vehicles stored in the list back to the vehicles.txt file in the proper (original) format when user choses to exit the program.

Sample Output: