TaxableItem Java Program

// Sammy Samkough

public interface Item
{
	double purchasePrice();
}
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// Sammy Samkough

public abstract class TaxableItem implements Item
{
	private double taxRate;

	public abstract double getListPrice();

	public TaxableItem(double rate)
	{
		taxRate = rate;
	}

	// Part A
	// returns the price of the item including the tax
	public double purchasePrice()
	{
		double purchasePrice = getListPrice() * (1 + taxRate);

		return purchasePrice;
	}

	/** Added the getTaxRate() Accessor Method */
	public double getTaxRate()
	{
		return taxRate;
	}
}
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// Sammy Samkough
// Part B - Create the Vehicle class which extends the TaxableItem class.
// 			* A vehicle has two parts to its list price: a dealer cost and dealer markup.
//			* The list price of a vehicle is the sum of the dealer cost and the dealer markup.
//			* Your class should have a constructor that takes dealer cost, dealer markup, and the tax rate as parameters.
//			* Provide any instance variables needed and implement all necessary methods.
// 			* Also provide a public method changeMarkup, which changes the dealer markup to the value of its parameter.


public class Vehicle extends TaxableItem
{
  	/* Instance Variables not shown - read the comments for Part B above */
	private int dealerCost;
	private int dealerMarkup;
	private int taxRate;

	/* Class Methods not shown - read the comments for Part B above */
	public Vehicle(double tRate)
	{
		super(tRate);
		dealerCost = 0;
		dealerMarkup = 0;
	}

	public Vehicle(int dCost, int dMarkup, double tRate)
	{
		super(tRate);
		tRate = taxRate;
		dealerCost = dCost;
		dealerMarkup = dMarkup;
	}

	public void changeMarkup(int cMarkup)
	{
		dealerMarkup = cMarkup;
	}

	public double getListPrice()
	{
		return dealerCost + dealerMarkup;
	}

	public double getPurchaseCost()
	{
		return getListPrice() + (1 + taxRate);
	}

	/*** Not specifically asked for in question - but toString() should be added here to allow a client to print
	 *   Label and print out the Dealer Cost, Dealer Markup, List Price, Tax Rate and Purchase Price
	*/
	public String toString()
	{
		String result = "";

		result += "Dealer Cost: " + dealerCost + " Dealer Markup: " + dealerMarkup;

		return result;
	}
}
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// Sammy Samkough

import java.util.ArrayList;

public class VehicleRunner
{
	public static void main(String[] args)
	{
		Vehicle one = new Vehicle(25000, 3200, .07);
		Vehicle two = new Vehicle(33000, 4300, .07);
		Vehicle three = new Vehicle(51000, 6000, .07);

		ArrayList<Vehicle> cars = new ArrayList<Vehicle>();

		cars.add(one);
		cars.add(two);
		cars.add(three);

		System.out.println(cars);
	}
}