Question

1-public double getTotalCost();
A method that returns the total cost of items without tax.The number has to be rounded to the nearest two decimal points.... @return The total cost without tax
2-public double getTotalTax();
A method that returns the total tax. The number has to be rounded to the nearest two decimal points..@return The total taxes of items
3-public void addItem(Fruit fruit);
Add a fruit to the cashier for checkout...@param fruit The fruit object to add
4-public void clear();
Clear all fruits from this cashier
5-public int getNumberOfItems();
Get the number of items in the current cashier box .. @return the total number of items in this cashier box

Answer 1

Answer on Question #59443, Programming & Computer Science, Java, JSP, JSF

Condition

1-public double getTotalCost();

A method that returns the total cost of items without tax. The number has to be rounded to the nearest two decimal points... @return The total cost without tax

2-public double getTotalTax();

A method that returns the total tax. The number has to be rounded to the nearest two decimal points..@return The total taxes of items

3-public void addItem(Fruit fruit);

Add a fruit to the cashier for checkout...@param fruit The fruit object to add

4-public void clear();

Clear all fruits from this cashier

5-public int getNumberOfItems();

Get the number of items in the current cashier box .. @return the total number of items in this cashier box

Code

Shop.java

import java.util.ArrayList;
public class Task {
    public static void main(String[] args) {
        ArrayList<Fruit> fruits = new ArrayList<Fruit>();
        Apple apple = new Apple(3);
        Banana banana = new Banana(3, 12.5);
        Lemon lemon = new Lemon(6, 1.5);
        OrangeLime orangeLime = new OrangeLime(4, 0.4, 5);
        Cashier cashier = new Cashier("Fruit shop", fruits);
        cashier.addItem(apple);
        cashier.addItem(banana);
        cashier.addItem(lemon);
        cashier.addItem(orangeLime);
        System.out.println(cashier);
    }
}

Fruit.java

public abstract class Fruit {
    public abstract double getCost();
}

Consts.java

public class Consts {
    public static final String PRICE_FORMAT = "#0.00";
    public static final double APPLE_PRICE = 24.0; // per dozen
    public static final int LEMONS_IN_A_JUICE = 6;
    public static final int TAX_RATE = 20;
}

Cashier.java

import java.text.DecimalFormat;
import java.util.ArrayList;
public class Cashier {
    private String shopName;
    private ArrayList<Fruit> fruits;
    public Cashier(String shop, ArrayList<Fruit> fruits) {
        this.shopName = shop;
        this.fruits = fruits;
    }
    public double getTotalCost() {
        double cost = 0;
        for (Fruit fruit : fruits) {
            cost = cost + fruit.getCost();
        }
        return cost;
    }
    public double getTotalTax() {
        return getTotalCost() * Consts.TAX_RATE / 100;
    }
    public void addItem(Fruit fruit) {
        fruits.add(fruit);
    }
    public int getNumberOfItems() {
        return fruits.size();
    }
    public void clear() {
        fruits.clear();
    }
    @Override
    public String toString() {
        return "Shop: " + shopName + "\n" +
               "1. " + fruits.get(0).getClass().getName() + ": " +
               new DecimalFormat(Consts.PRICE_FORMAT).format(fruits.get(0).getCost()) + "$" +
               "\n" +
               "2. " + fruits.get(1).getClass().getName() + ": " +
               new DecimalFormat(Consts.PRICE_FORMAT).format(fruits.get(1).getCost()) + "$" + "\n" +
               "3. " + fruits.get(2).getClass().getName() + ": " +
               new DecimalFormat(Consts.PRICE_FORMAT).format(fruits.get(2).getCost()) + "$" + "\n" +
               "4. " + fruits.get(3).getClass().getName() + ": " +
               new DecimalFormat(Consts.PRICE_FORMAT).format(fruits.get(3).getCost()) + "$" + "\n" +
               "---" + "\n" +
               "Items: " + getNumberOfItems() + "\n" +
               "Total cost: " + new DecimalFormat(Consts.PRICE_FORMAT).format(getTotalCost()) + "$" + "\n" +
               "Total tax: " + new DecimalFormat(Consts.PRICE_FORMAT).format(getTotalTax()) + "$";
    }
}

Apple.java

public class Apple extends Fruit {
    private int applesNumber;
    public Apple(int number) {
        this.applesNumber = number;
    }
    @Override
    public double getCost() {
        return (Consts.APPLE_PRICE / 12.0) * applesNumber;
    }
}

Banana.java

public class Banana extends Fruit {
    private double bananasWeight;
    private double bananaPrice;
    public Banana(double weight, double price) {
        this.bananasWeight = weight;
        this.bananaPrice = price;
    }
    @Override
    public double getCost() {
        return bananasWeight * bananaPrice;
    }
}

Lemon.java

public class Lemon extends Fruit {
    private int lemonsNumber;
    private double lemonPrice;
    public Lemon(int number, double price) {
        this.lemonsNumber = number;
        this.lemonPrice = price;
    }
    @Override
    public double getCost() {
        return lemonPrice * lemonsNumber;
    }
}

OrangeLime.java

public class OrangeLime extends Lemon {
    private int numberOfJuices;
    private double pricePerLemon;
    private double laborCost;
    public OrangeLime(int number, double price, double labor) {
        super(number, price);
        this.numberOfJuices = number;
        this.pricePerLemon = price;
        this.laborCost = labor;
    }
    @Override
    public double getCost() {
        return (numberOfJuices * Consts.LEMONS_IN_A_JUICE * pricePerLemon) +
               laborCost;
    }
}

Output

Shop: Fruit shop

1. Apple: 6.00$2. Banana: 37.50$

3. Lemon: 9.00$4. OrangeLime: 14.60$

Items: 4

Total cost: 67.10$Total tax: 13.42$

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