These 5 classes make a "shopping cart" and in ShoppingTest.java I create Items, some which have possible bulk prices. I've debugged it several times and I can't figure out why NaN is getting returned! All help is appreciated, thank you.
I know it is here: bulkPrice = bulkPrice / bulkAmount;
I would like some help on how to get around the Not a number problem, but still implement the code above and below.
(Run ShoppingTest)
public class ShoppingTest{
public static void main(String[] args){
Item sillyPutty = new Item("silly putty" , 3.95, 10, 19.99);
Item sillyString = new Item("silly string" , 3.5, 10, 14.95);
Item bottleOfBubbles = new Item("bottle o bubbles" , .99);
Item nintendoWii = new Item("Nintendo Wii System" , 389.99);
Item mario = new Item("Mario Computer Science Party 2(Wii)",49.99);
Item jamChallenge = new Item("Don Knuth Code Jam Challenge(Wii)", 49.99);
Item computerSciencePen = new Item("Computer Science Pen", 3.4);
Item rubiksCube = new Item("Rubik's cube" , 9.1);
Item computerScienceBarbie = new Item("Computer Science Barbie", 10.99);
Item button = new Item("\'Java Rules!\'button" , .99, 10, 5);
Item bumperSticker = new Item("\'Java Rules\'bumper sticker", .99, 20, 8.95);
Catalog catalog = new Catalog("RHS catalog" );
catalog.add(sillyPutty);
catalog.add(sillyString);
catalog.add(bottleOfBubbles);
catalog.add(nintendoWii);
catalog.add(mario);
catalog.add(jamChallenge);
catalog.add(computerSciencePen);
catalog.add(rubiksCube);
catalog.add(computerScienceBarbie);
catalog.add(button);
catalog.add(bumperSticker);
ItemOrder order = new ItemOrder(sillyPutty, 2);
ItemOrder order2 = new ItemOrder(bottleOfBubbles, 3);
ItemOrder order3 = new ItemOrder(nintendoWii, 1);
ItemOrder order4 = new ItemOrder(computerSciencePen, 1);
ItemOrder order5 = new ItemOrder(computerScienceBarbie, 4);
ItemOrder order6 = new ItemOrder(button,12);
ShoppingCart cart = new ShoppingCart();
cart.add(order);
cart.add(order2);
cart.add(order3);
cart.add(order4);
cart.add(order5);
cart.add(order6);
double totalPrice = 0;
totalPrice = cart.getTotal();
System.out.print(totalPrice);
}
}
import java.util.*;
//Stores information about the overall order
public class ShoppingCart{
ArrayList<ItemOrder> itemOrder;
double total;
boolean discount;
public ShoppingCart(){
itemOrder = new ArrayList<ItemOrder>();
total = 0.0;
discount = false ;
}
public void add(ItemOrder order){
for(int i =0; i< itemOrder.size(); i++){
if (itemOrder.get(i).getItem() == order.getItem()){
itemOrder.remove(itemOrder.get(i));
}
}
itemOrder.add(order);
}
public void setDiscount(boolean value){
if (value == true ){
discount = true ;
}
}
public double getTotal(){
for (int i = 0; i<itemOrder.size(); i++){
total += itemOrder.get(i).getPrice();
}
if (discount == true ){
total = total * .9;
}
return total;
}
}
//Stores information aout a particular item
// and the quantity ordered for that item
public class ItemOrder{
int quantity;
Item item;
//double itemOrderCost;
public ItemOrder(Item inItem, int inQuantity){
quantity = inQuantity;
item = inItem;
}
public double getPrice(){
return item.priceFor(quantity);
}
public Item getItem(){
return item;
}
}
import java.util.*;
//stores information about a collection of these items
public class Catalog {
ArrayList<Item> itemList;
String catalogName;
Item item;
public Catalog(String inName){
catalogName = inName;
itemList = new ArrayList<Item>();
}
public void add(Item itemInformation){
itemList.add(itemInformation);
}
public int size(){
return itemList.size();
}
public Item get(int index){
Item itemAtIndex = itemList.get(index);
return itemAtIndex;
}
public String getName(){
return catalogName;
}
}
//stores information about specific item
public class Item{
String name;
double price;
double bulkPrice;
int bulkQuantity;
boolean isBulkItem;
public Item(String inName, double inPrice)throws IllegalArgumentException{
name = inName;
price = inPrice;
isBulkItem = false ;
if (price<0){
throw new IllegalArgumentException("Price can't be negative");
}
}
public Item(String inName, double inPrice, int inBulkQuantity, double inBulkPrice){
name = inName;
price = inPrice;
bulkPrice = inBulkPrice;
bulkQuantity = inBulkQuantity;
isBulkItem = true ;
if (price < 0 || bulkPrice < 0){
throw new IllegalArgumentException("Can't be negative");
}
}
public double priceFor(int quantity){
int withNormalPrice = 0;
int bulkAmount = 0;
if (quantity <0){
throw new IllegalArgumentException("quantity can't be negative");
}
if (isBulkItem==true ){
withNormalPrice = quantity%bulkQuantity;
bulkAmount = quantity-withNormalPrice;
bulkPrice = bulkPrice / bulkAmount;
price = (bulkAmount*bulkPrice) + (price * withNormalPrice);
}
else {
price = price * quantity;
}
return price;
}
public String toString(){
String amounts = "" ;
amounts = name + ", " + price;
if (bulkPrice > 0|| bulkQuantity > 0){
amounts = amounts + " (" + bulkPrice + "for " + bulkQuantity;
}
// NumberFormat nf = NumberFormat.getCurrencyInstance();
// String text = nf.format(price);
return amounts;
}
}
