• Draw a UML structure diagram showing the relationship between the classes in your solution. You may hand draw or use any tool of your choice but the diagram must be submitted in a format that I can read (one of .docx, .pdf, .jpg, .txt). If I cannot read it, I cannot grade it.
• Draw a UML class diagram for your ShoppingCart class (may be combined with the structure diagram).

import java.text.DecimalFormat;

// Defines class GroceryItem

public class GroceryItem

{

// Defines decimal format

String decFormat = "####,####.##";

// Creates an object of the class DecimalFormat

DecimalFormat decimalFormat = new DecimalFormat(decFormat);

// Instance variables to store item information

private String name;

private double price;

private int qty;

// Parameterized constructor to assign parameter values to instance variables

public GroceryItem (String name, double price, int qty)

{

this.name = name;

this.price = price;

this.qty = qty;

}

// Getter methods

public String getName()

{

return name;

}

public double getPrice()

{

return price;

}

public int getQty()

{

return qty;

}

// Setter methods

public void setName(String name)

{

this.name = name;

}

public void setPrice(double price)

{

this.price = price;

}

public void setQty(int qty)

{

this.qty = qty;

}

// Overrides equals() method to return true

// if parameter object item name is equals to implicit object item name

// Otherwise returns false

public boolean equals(Object item)

{

// Checks if parameter object is equals to implicit object

if(item == this)

return true;

// Check if parameter object is not an instance of GroceryItem

if(!(item instanceof GroceryItem))

return false;

// Type-cast parameter object to GroceryItem

GroceryItem gi = (GroceryItem) item;

// Compare the parameter object name with implicit object name

if(gi.getName().equalsIgnoreCase(name))

return true;

else

return false;

}

// Overrides toString() method to return item information

public String toString()

{

return String.format(" %-16s", name) +

String.format("%-12s", decimalFormat.format(price)) +

String.format("%-10d", qty) +

String.format("%-10s", decimalFormat.format(qty * price)) + " ";

}

}// End of class GroceryItem

//Defines class ShoppingCart

public class ShoppingCart

{

//Instance variables to store shopping cart information

String customerName;

//Declares an array of object of class GroceryItem

GroceryItem order[];

int numItems;

//Default constructor to assign default values to instance variables

//and creates the order array of size 10

ShoppingCart()

{

customerName = "Harun";

order = new GroceryItem[10];

numItems = 0;

}

//Overloads constructor to assign parameter customer name to instance variable

//name and creates the order array of size 10

ShoppingCart(String name)

{

customerName = name;

order = new GroceryItem[10];

numItems = 0;

}

//Overloads constructor to assign parameter customer name and capacity

//to instance variable name

//and creates the order array of size parameter capacity

ShoppingCart(String name, int capacity)

{

customerName = name;

order = new GroceryItem[capacity];

numItems = 0;

}

//Method to add an item to cart

//If added successfully then returns true

//Otherwise returns false

boolean add(String name, double price, int quantity)

{

// Checks if current number of items is equals to length of the array

// displays the error message and returns false

if(numItems == order.length)

{

System.out.println(" Unable to add item cart is full.");

return false;

}

// Otherwise add the item to caret

else

{

// Creates an object of class GroceryItem using parameterized constructor

// Assigns it to numItems index position of order

// and increases the numItems by one

order[numItems++] = new GroceryItem(name, price, quantity);

return true;

}

}

//Method to search the parameter name in the cart

//If found then returns the found item index position

//Otherwise returns -1

int find(String name)

{

// Loops till number of items available in the shopping cart

for(int c = 0; c < numItems; c++)

// Checks if parameter item name is equals current object

// item name then returns loop variable as found index position

if(name.equals(order[c].getName()))

return c;

// Otherwise returns -1 for not found

return -1;

}

//Method to calculate and returns the total amount of products available

//in the cart

double getTotalBeforeTax()

{

double amount = 0;

// Loops till number of items available in the shopping cart

for(int c = 0; c < numItems; c++)

// Calculates total

amount += (order[c].getQty() * order[c].getPrice());

// returns amount

return amount;

}

//Method to calculate and returns the total tax for the products available

//in the cart

double getTax(double taxRate)

{

double tax = 0;

// Loops till number of items available in the shopping cart

for(int c = 0; c < numItems; c++)

// Calculates tax of each product and adds it

tax += (order[c].getQty() * order[c].getPrice()) * (taxRate / 100.0);

// returns total tax

return tax;

}

//Method to return number of items available in the cart

int getNumGroceryItems()

{

return numItems;

}

//Method to return total number quantity available in the cart

int getTotalQuantity()

{

int total = 0;

// Loops till number of items available in the shopping cart

for(int c = 0; c < numItems; c++)

// Calculates total for the quantity

total += order[c].getQty();

// returns total quantity

return total;

}

//Overrides toString() method to return cart information

public String toString()

{

String result = " ******************************************";

result += " \t Customer Name: " + customerName +

" ******************************************" +

String.format(" %-16s", "Item") +

String.format("%-12s", "Price") + String.format("%-10s", "Qty") +

String.format("%-10s ", "Total");

// Loops till number of items available in the shopping cart

for(int c = 0; c < numItems; c++)

result += order[c].toString();

result += String.format(" %-14s $%-10.2f", "Total:", getTotalBeforeTax());

result += String.format(" %-14s $%-10.2f", "Tax: ", getTax(7.5));

result += String.format(" %-14s $%-10.2f", "Grand total: ",

(getTotalBeforeTax() + getTax(7.5)));

return result;

}

}// End of class ShoppingCart

public class ShoppingCartDriver

{

// main method definition

public static void main(String ss[])

{

// Creates an object of class ShoppingCart using

// one argument parameterized constructor

ShoppingCart one = new ShoppingCart("Harun");

// Creates an object of class ShoppingCart using

// two argument parameterized constructor

ShoppingCart two = new ShoppingCart("Ali", 2);

// Calls the method to add item to cart one

one.add("Rice", 1.50, 3);

one.add("Sushi", 8.25, 2);

one.add("Sambusa", 5.80, 4);

// Displays cart one information with report

System.out.println(one);

System.out.println(" Number of items available in the cart: " +

one.getNumGroceryItems());

System.out.println(" Total quantity available in the cart: " +

one.getTotalQuantity());

// Calls the method to add item to cart one

two.add("Sugar", 52.22, 9);

two.add("Milk Powder", 118.90, 4);

two.add("Coffee", 22.57, 1);

// Displays cart one information with report

System.out.println(two);

System.out.println(" Number of items available in the cart: " +

one.getNumGroceryItems());

System.out.println(" Total quantity available in the cart: " +

one.getTotalQuantity());

}

}// End of driver class