The Checkout class manages items in a shopping cart. It allows adding and removing items, calculates the total cost and tax, and outputs a summary. The code tests the Checkout class by adding different items to the cart, calculating totals, and printing summaries. Item subclasses like Baguette and Rice override methods to return custom cost and string representations based on each item's attributes.

1. import java.util.ArrayList;
public class Checkout{
private ArrayList checkoutList;
Checkout(){
checkoutList= new ArrayList();
}
public int numberOfItems(){
return checkoutList.size();
}
public int totalCost(){
int sum=0;
for (Item i : checkoutList){
sum+=i.getCost();
}
return sum;
}
public int totalTax(){

2. return (int) java.lang.Math.
round
(GroceryStore.
TAX_RATE
*totalCost()/100.0);
}
public void clear(){
checkoutList.clear();
}
public void enterItem(Item i){
checkoutList.add(i);
}
public String toString(){
;
System.
out
.println("t"+GroceryStore.
STORE_NAME
);
System.
out
.println("nt-------------------");
for (Item i : checkoutList){

3. System.
out
.println(i.toString());
}
System.
out
.println("nTax "+GroceryStore.
cents2dollarsAndCents
(totalTax()));
System.
out
.println("nTotal Cost "+GroceryStore.
cents2dollarsAndCents
(totalCost()+totalTax()));
return "";
}
}
// Test Check out
public class TestCheckout {
public static void main(String[] args) {
Checkout checkout = new Checkout();
checkout.enterItem(new Rice("Basmati Rice", 2.25, 399));

4. checkout.enterItem(new Baguette("Wheat Baguette", 105));
checkout.enterItem(new FlavoredBaguette("White Baguette",
145, "Chocolate", 50));
checkout.enterItem(new Egg("Grade A Organic Eggs", 4,
399));
System.
out
.println("nNumber of items: " + checkout.numberOfItems() +
"n");
System.
out
.println("nTotal cost: " + checkout.totalCost() + "n");
System.
out
.println("nTotal tax: " + checkout.totalTax() + "n");
System.
out
.println("nCost + Tax: " + (checkout.totalCost() +
checkout.totalTax()) + "n");
System.
out
.println(checkout);
checkout.clear();
checkout.enterItem(new Baguette("Organic Baguette", 145));
checkout.enterItem(new FlavoredBaguette("Wheat Baguette",

5. 105, "Caramel", 50));
checkout.enterItem(new Rice("Indian Brown Rice", 1.33, 89));
checkout.enterItem(new Egg("Grade B Egg", 4, 399));
checkout.enterItem(new Rice("Arabic White Rice", 1.5, 209));
checkout.enterItem(new Rice("Spanish Yellow Rice", 3.0,
109));
System.
out
.println("nNumber of items: " + checkout.numberOfItems() +
"n");
System.
out
.println("nTotal cost: " + checkout.totalCost() + "n");
System.
out
.println("nTotal tax: " + checkout.totalTax() + "n");
System.
out
.println("nCost + Tax: " + (checkout.totalCost() +
checkout.totalTax()) + "n");
System.
out
.println(checkout);
}
//Baguette

6. public class Baguette extends Item {
private double cost;
public Baguette(String name, double cost) {
super(name);
this.cost = cost;
}
@Override
public int getCost()
{
return (int)Math.
ceil
(cost);
}
@Override
public String toString() {
return name+" @" + GroceryStore.
cents2dollarsAndCents
(getCost());
}
}

7. public class Rice extends Item {
double weight;
double price;
public Rice(String name, double weight, double price) {
super(name);
this.weight = weight;
this.price = price;
}
@Override
public int getCost() {
return (int) Math.
ceil
(weight * price);
}
@Override
public String toString() {
return "rice" + weight + "lbs @" + GroceryStore.
cents2dollarsAndCents

8. (getCost());
}
}