Create a Program to Create Shopping System in Java Assignment Solution

Instructions

Objective

Write a java homework program to create shopping system.

Requirements and Specifications

Source Code

ELECTRONIC ITEM

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package shopping; /** * * @author Eduardo */ public class ElectronicItem extends ShoppingItem { private int storage; public ElectronicItem(String name, int quantity, double price, int storage) { super(name, quantity, price); this.storage = storage; } public int getStorage() {return storage;} public void setStorage(int newStorage) {storage = newStorage;} @Override public String toString(){ return "(Electronics) " + super.toString() + String.format(", Storage: %d GB", getStorage()); } }

FOOD ITEM

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package shopping; /** * * @author Eduardo */ public class FoodItem extends ShoppingItem { private int calories; private double proteins; public FoodItem(String name, int quantity, double price, int calories, double proteins) { super(name, quantity, price); this.calories = calories; this.proteins = proteins; } public int getCalories() {return calories;} public double getProteins() {return proteins;} public void setCalories(int newCalories) {calories = newCalories;} public void setProteins(double newProteins) {proteins = newProteins;} @Override public String toString(){ return "(Food) " + super.toString() + String.format(", Calories: %d, Proteins: %.1f%%", getCalories(), getProteins()*100.0); } }

SHOPPING JAVA

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package shopping; import java.util.ArrayList; import java.util.List; import java.util.Scanner; /** * * @author Ken */ public class Shopping { /** * @param args the command line arguments */ public static void main(String[] args) { // Create Scanner Scanner sc = new Scanner(System.in); ShoppingBag myBag = new ShoppingBag(); //this is myBag. I can buy things to put in it // Create a list of all available items in the shop List stock = new ArrayList(); // add some items as examples, like food and electronics stock.add(new FoodItem("Bag of 10x oranges", 10, 0.499, 100, 0.05)); stock.add(new FoodItem("Bread", 1, 0.5, 140, 0.1)); stock.add(new ElectronicItem("microSD Kingston", 1, 59.99, 512)); stock.add(new ElectronicItem("Crucial SSD", 1, 69.99, 1000)); // start program while(true) { // dsplay menu displayMainMenu(); System.out.println("Please enter an option: "); // ask for main menu int option = getMenuOption(sc, 1, 3); System.out.println(""); if(option == 1) // buy item { // display items displayAvailableItems(stock); System.out.println("Please enter an option: "); // ask for item id int index = getMenuOption(sc, 1, stock.size()); System.out.println(""); // get item by index ShoppingItem item = stock.get(index-1); // add item to the bag myBag.buyItem(item); // display item info System.out.println("The following item has been added to your bag: " + item.toString()); } else if(option == 2) // list items { myBag.printBag(); } else if(option == 3) // print bag and leave { System.out.println("Here is a summary of your orders:"); myBag.printBag(); break; } } sc.close(); } // method to display the menu public static void displayMainMenu() { System.out.println("1) Buy Item"); System.out.println("2) List all items in bag"); System.out.println("3) Leave Shop"); } public static void displayAvailableItems(List items) { // get number of items int N = items.size(); // assign one id to each item int i = 1; for(ShoppingItem item: items) { System.out.println(String.format("%d) %s", i, item.toString())); i++; } } public static int getMenuOption(Scanner sc, int lb, int ub) { /* This function asks to user for a menu option (int) that is between lb and ub If the user enters a wrong option, the function will keep requesting for the correct one */ while(true) { int option = Integer.valueOf(sc.nextLine()); if(option >= lb && option <= ub) return option; else System.out.println(String.format("Please enter an optionn between %d and %d.", lb, ub)); } } }