OOP Project

Ahmed Walid

Ahmed Mohamed

Alsayed Aly

Simple ordering system
Explore the docs »

Report Bug · Request Feature

Table of Contents

1. About The Project
2. Features
3. The UML
4. The Code
5. The Runtime
6. Contributing
7. License
8. Contact
9. Acknowledgments

About The Project

In this project a simple ordering system is implemented in which the user has a shopping menu displayed with the following:

• Main menu:

Pizza, $40
Cheeseburger, $20
Coffee, $5
Soda, $4
Water, $2

• Takes input from the user that represents each item and its quantity.
• Adds the items with their quantities to the user’s shopping cart.
• On checkout, takes input from the user representing their payment method (PayPal or CreditCard).
• Calculates and displays the amount of the order to the user and performs the payment using the method determined by the user and displays a confirmation message of the payment status (success or failure).

(back to top)

Features

• UML diagram
• JOptionPane is used for the GUI to display and take inputs from the user
• Added abstract classes
• Added polymorphism
• Added screenshots of the run

(back to top)

The UML

(back to top)

The Java code

MyClass.java

package project;

import javax.swing.JOptionPane;
import java.util.Date;

public class MyClass {

    public static void main(String[] args) {
        String purchase;
        PaymentMethod PaymentMethod;   // polymorphism 
        ShoppingCart cart = new ShoppingCart();
        do {
            String name = JOptionPane.showInputDialog("Please, select a product:\n-   Pizza, $40 \n-   Cheeseburger, $20\n-   Coffee, $5\n-   Soda, $4\n-   Water, $2\n" + "\nEnter item’s name ");
            double price = Double.parseDouble(JOptionPane.showInputDialog("Please, select a product:\n-   Pizza, $40 \n-   Cheeseburger, $20\n-   Coffee, $5\n-   Soda, $4\n-   Water, $2\n" + "\nEnter item’s Price "));
            int quantity = Integer.parseInt(JOptionPane.showInputDialog("Please, select a product:\n-   Pizza, $40 \n-   Cheeseburger, $20\n-   Coffee, $5\n-   Soda, $4\n-   Water, $2\n" + "\nEnter item’s Quantity "));

            Item item = new Item(name, quantity, price);
            cart.add(item);
            String discountInput = JOptionPane.showInputDialog("Do you have discount? (Y/N)");
            if (discountInput.equals("Y") || discountInput.equals("y")) {
                int discountAmount = Integer.parseInt(JOptionPane.showInputDialog("Enter Discount Percentage"));
                item.setPrice(price, discountAmount);
            }
            purchase = JOptionPane.showInputDialog("Proceed to checkout (Y/N)");
        } while (purchase.equals("N") || purchase.equals("n"));
        String choice = JOptionPane.showInputDialog("choose a payment method (PayPal or CreditCard)");
        if (choice.equals("Paypal") || choice.equals("paypal") || choice.equals("PayPal")) {
            String email = JOptionPane.showInputDialog("Enter Email ");
            String Password = JOptionPane.showInputDialog("Enter Password ");
            int balance = Integer.parseInt(JOptionPane.showInputDialog("Enter Balance"));
            PaymentMethod = new PayPal(email, Password);                //polymorphism
            ((PayPal) PaymentMethod).setBalance(balance);
            if (PaymentMethod.isValid()) {
                JOptionPane.showMessageDialog(null, "Valid", "PaymentMethod", JOptionPane.INFORMATION_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(null, "InValid", "PaymentMethod", JOptionPane.INFORMATION_MESSAGE);
            }

        } else {
            String name = JOptionPane.showInputDialog("Enter cardName ");
            String cardNumber = JOptionPane.showInputDialog("Enter cardNumber ");
            int cvv = Integer.parseInt(JOptionPane.showInputDialog("Enter cvv"));
            int year = Integer.parseInt(JOptionPane.showInputDialog("Enter expiryDate (year)"));
            int month = Integer.parseInt(JOptionPane.showInputDialog("Enter expiryDate (month)"));
            int day = Integer.parseInt(JOptionPane.showInputDialog("Enter expiryDate (day)"));
            Date expiryDate = new Date(year - 1900, month - 1, day);

            int Balance = Integer.parseInt(JOptionPane.showInputDialog("Enter Balance"));

            PaymentMethod = new CreditCard(name, cardNumber, cvv, expiryDate);
            ((CreditCard) PaymentMethod).setBalance(Balance);
            if (PaymentMethod.isValid()) {
                JOptionPane.showMessageDialog(null, "Valid", "PaymentMethod", JOptionPane.INFORMATION_MESSAGE);
            } else {
                JOptionPane.showMessageDialog(null, "InValid", "PaymentMethod", JOptionPane.INFORMATION_MESSAGE);
            }

        }
        JOptionPane.showMessageDialog(null, cart.checkout(PaymentMethod), "CheckOut", JOptionPane.INFORMATION_MESSAGE);

        String display = JOptionPane.showInputDialog("DO you want to see what's in your cart? (Y/N)");
        if (display.equals("Y") || display.equals("y")) {
            cart.display();
        }

    }

}

Item.java

package project;
public class Item 
{
    private String name;
    private int quantity;
    private double price;
    public static int count = 0;
    Item(String name,int quantity,double price)
    {
        this.name=name;
        this.quantity=quantity;
        this.price=price;
                count++;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    public void setPrice(double price) {
        this.price = price;
    }
   
    public void setPrice(double price, int discountPercent) {
        this.price = ((price * discountPercent) / 100);        // OverLoading
    }
     public double getPrice() {
        return price;
    }
}

PaymentMethod.java

package project;

public interface PaymentMethod {

    public boolean isValid();

    public String pay(int amount);
}

PayPal.java

package project;

import java.util.regex.*;
import javax.swing.JOptionPane;

public class PayPal implements PaymentMethod {

    private String email, password;
    private int balance;

    PayPal(String email, String password) {
        this.email = email;
        this.password = password;
        balance = 0;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getBalance() {
        return balance;
    }

    public void setBalance(int balance) {
        this.balance = balance;
    }

    @Override
    public boolean isValid() {
        //email
        String emailRegex = "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,6}$";
        Pattern emailPattern = Pattern.compile(emailRegex);
        Matcher emailMatcher = emailPattern.matcher(email);

        //password
        String passwordRegex = "^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=\\S+$).{8,}$";
        Pattern passwordPattern = Pattern.compile(passwordRegex);
        Matcher passwordMatcher = passwordPattern.matcher(password);

        return (emailMatcher.matches() && passwordMatcher.matches());
    }

    @Override
    public String pay(int amount) {
        if (isValid() && amount <= balance) {
            balance -= amount;
            return "Successful Remaining balance = " + balance;
        } else {
            return "failed";
        }

    }
}

CreditCard.java

package project;

import java.util.Date;

public class CreditCard implements PaymentMethod {

    private String cardName, cardNumber;
    private int cvv, balance;
    private Date expiryDate;

    CreditCard(String cardName, String cardNumber, int cvv, Date expiryDate) {
        balance = 0;
        this.cvv = cvv;
        this.cardName = cardName;
        this.expiryDate = expiryDate;
    }

    public String getCardName() {
        return cardName;
    }

    public void setCardName(String cardName) {
        this.cardName = cardName;
    }

    public String getCardNumber() {
        return cardNumber;
    }

    public void setCardNumber(String cardNumber) {
        this.cardNumber = cardNumber;
    }

    public int getCvv() {
        return cvv;
    }

    public void setCvv(int cvv) {
        this.cvv = cvv;
    }

    public int getBalance() {
        return balance;
    }

    public void setBalance(int balance) {
        this.balance = balance;
    }

    public Date getExpiryDate() {
        return expiryDate;
    }

    public void setExpiryDate(Date expiryDate) {
        this.expiryDate = expiryDate;
    }

    @Override
    public boolean isValid() {
        Date CurrentDate = new Date();
        return expiryDate.after(CurrentDate);
    }

    public String pay(int amount) {
        if (isValid() && balance >= amount) {

            balance -= amount;

            return "Successful Remaining balance = " + balance;
        } else {
            return "failed";
        }
    }
}

Display

package project;

public abstract class Display {

    public abstract void display();
}

ShoppingCart.java

package project;

import javax.swing.JOptionPane;
import java.util.ArrayList;

public class ShoppingCart extends Display {

    ArrayList<Item> orderItems;

    public ShoppingCart() {
        orderItems = new ArrayList<>();      // composition relationship
    }

    public void add(Item item) {
        if (orderItems.size() < 10) {
            orderItems.add(item);
        } else {
            JOptionPane.showMessageDialog(null, "Error", "Add Item", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    public void remove(Item item) {
        if (!orderItems.isEmpty() && orderItems.contains(item)) {
            orderItems.remove(item);
        } else {
            JOptionPane.showMessageDialog(null, "Error", "remove Item", JOptionPane.INFORMATION_MESSAGE);
        }

    }

    public double getTotalAmount() {
        double total = 0;
        for (int i = 0; i < orderItems.size(); i++) {
            total += (orderItems.get(i).getPrice()) * (orderItems.get(i).getQuantity());
        }
        return total;
    }

    public String checkout(PaymentMethod paymentMethod) {
        JOptionPane.showMessageDialog(null, "number of items in your Cart = " + Item.count + " And Your TotalAmount = " + getTotalAmount(), "Checkout", JOptionPane.INFORMATION_MESSAGE);
        return paymentMethod.pay((int) getTotalAmount());
    }

    @Override
    public void display() // Override (Abstract class)
    {
        for (int i = 0; i < orderItems.size(); i++) {

            JOptionPane.showMessageDialog(null, "item in index (" + (i + 1) + ") :\n" + "item’s name:" + orderItems.get(i).getName() + "\n" + "item’s price :" + orderItems.get(i).getPrice() + "\n" + "item’s Quantity :" + orderItems.get(i).getQuantity(), "Display", JOptionPane.INFORMATION_MESSAGE);
        }
    }
}

(back to top)

The Runtime

All test cases

(back to top)

Contributing

Any contributions you make are greatly appreciated.

Project Link: https://github.com/ahmeddwalid/OOP-project

(back to top)

License

This project is distributed under the MIT License. See LICENSE.txt for more information.

(back to top)

Contact

Ahmed Walid

• Email

Ahmed Mohamed

• Email

Alsayed Aly

• Email

(back to top)

Acknowledgments

• Java Documentation
• Mohaned ElDeeb get in touch

(back to top)