Shopping cart exercise java
Create an Item class that models an Item to be purchased. It should contain instance data and a constructor to hold the following characteristics: name, price and quantity. Item class should also include accessor methods for the 3 characteristics and a toString summary. Create an ArrayList to hold Item instances. Call your ArrayList items. Here is an example of an ArrayList declaration that holds String instances:.
The ShopApp class should be designed to model shopping in similar fashion brother stands for Amazon and other online sites where you can add to cart and you will see your total increase with each item added.
Use a loop to simulate shopping, asking unity geometry shader user to enter the item, quantity and price. You will need variables for these. Store the items in an ArrayList and update the total due at checkout. Stretch task : Provide an opportunity to remove an item from the shopping cart if a user no longer desires to make that particular purchase.
Stretchier task : Create a Cart class that is responsible for managing items. ShopApp should only manipulate the contents of the cart by calling methods on Cart. It should not talk directly to Item instances.Eckstrom wrote:.
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Initialized in default constructor. Default constructor. Parameterized constructor. The best ideas are the crazy ones.
If you have a crazy idea and it works, it's really valuable. Eckstrom wrote: Eclipse only gives me one warning: Resource leak: 'sc' is never closed. I'm not finding the problem to fix this. The best way to achieve this is by having only one of your classes contain a public constant for this that can be accessed from any class in the project.
Eckstrom wrote Forum: Beginning Java. Online shopping cart. I am trying to finish this, but i keep getting a couple of errors. This is the instructions for the assignment. Note: Some can be method stubs empty methods initially, to be completed in later steps. Has parameter ItemToPurchase.
Does not return anything. Has a string an item's name parameter. If item name cannot be found, output this message: Item not found in cart. Nothing removed. If item can be found by name in cart, check if parameter has default values for description, price, and quantity. If not, modify item in cart. If item cannot be found by name in cart, output this message: Item not found in cart.Knute Snortum wrote: Do you have a question to ask?
Or do you want a code review? Has parameter ItemToPurchase. Does not return anything. Forum: Beginning Java. Help with certain concepts of an online shopping cart.
Java Programming Item.java and Shop.java PLEASE HELP?
Mike Corona. This program extends the earlier "Online shopping cart" program. Consider first saving your earlier program. Note: Some can be method stubs empty methods initially, to be completed in later steps. Private fields String customerName - Initialized in default constructor to "none" String currentDate - Initialized in default constructor to "January 1, " ArrayList cartItems Default constructor Parameterized constructor which takes the customer name and date as parameters 1 pt Public member methods getCustomerName accessor 1 pt getDate accessor 1 pt addItem Adds an item to cartItems array.
Has a string an item's name parameter. If item name cannot be found, output this message: Item not found in cart. Nothing removed. If item can be found by name in cart, check if parameter has default values for description, price, and quantity.
If not, modify item in cart. If item cannot be found by name in cart, output this message: Item not found in cart. Nothing modified. Has no parameters. Output the name and date. Create an object of type ShoppingCart. Each option is represented by a single character.
It only takes a minute to sign up. Came across an extension task to gain more credits. But could not think of what to do:. Build a checkout system for a shop which sells 3 products say Bread, Milk, and Bananas.
Buy one bread and get another bread for free Buy 3 Milk for the price of 2 Buy 2 Bananas and get one free. But now when it comes to implementing the second part of the challenge. I have no idea where to start and what to do. I'm sure this problem is probably fairly standard in terms of implementing rules for things like discounts etc. Yes, a common problem in e-commerce sites, not easily solved if you have many product and offers. My approach is to give each item a price rather than having just a single total price.
Think of it as a receipt showing you which items have been reduced.1 Shopping Cart Intro Array Basics
Have a class Offer which includes required items in the basket for the offer to apply and a pricing function which takes the complete basket and the item to be priced. Now you will also notice that offers everyone understands like buy one get one free, are in fact more complicated.
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By passing the entire basket with pricing, I call it a Receipt into the pricing function you have enough information to be able to figure this kind of thing out and apply the correct price per item. Milke I tried to go for that approach but I cannot seem to be able to implement an Item Class for each separate items. NOTE: treat this example as pseudo code. I haven't coded Java in a while. I leave out important stuff like checking for null arguments. What if I buy multiple items?
Well, you add each one - AddItem - so no problem. Then I see I need to know how many of each kind to calculate total cost.
How to implement? Sign up to join this community.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This kata models the checkout price calculation of a shop either an online shop or a physical one, at the cash register.
A cart contains a number of items, and can compute the total price of its contents. There is no notion of inventory or of physical instances of products: a given item represents the general product, not the actual physical instance of that product. Therefore, to represent the purchase of several instances of a product, the corresponding item object will be added that many times to the cart. Cart items can either be actual products with a fixed unit price, or products with a pricing policy attached.
Pricing policies influence the asked price for the whole cart, like special offers, promotions, etc. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Java Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit.
Latest commit c4afdc2 Feb 25, Items represent goods that can be placed in the cart. You signed in with another tab or window. Reload to refresh your session.
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The file Item. An item has a name, price, and quantity the quantity purchased. The file ShoppingCart. Complete the ShoppingCart class by doing the following: a.
Declare an instance variable cart to be an array of Items and instantiate cart in the constructor to be an array holding capacity Items. Fill in the code for the increaseSize method. Your code should be similar to that in Listing 7.
Fill in the code for the addToCart method. This method should add the item to the cart and update the totalPrice instance variable note this variable takes into account the quantity. Compile your class. Write a program that simulates shopping. The program should have a loop that continues as long as the user wants to shop. Each time through the loop read in the name, price, and quantity of the item the user wants to add to the cart. After adding an item to the cart, the cart contents should be printed.
After the loop print a "Please pay This content has been marked as final. Show 22 replies. What specific problem are you having? He wants you to complete his homework assignment for him.When you are shopping over the Web, you can select numerous items that go into your virtual shopping cart. The shopping cart keeps a continuous list of what you want to buy and how much it costs.
When you have finished selecting items, you simply push a button and place your order. One of the problems with many CGI shopping carts is that all the shopping cart information resides on the Web server.
Every time you add an item to your cart, you have to communicate with the Web server. If you have a slow connection, it may take you quite a while to select the items.
A Java applet is an ideal place for a shopping cart. It can manage the items locally rather than saving them on the Web server.
When you decide that it's time to place your order, the Java applet sends your order to the Web server. Designing a Basic Shopping Cart One of the themes you have been hearing over and over again in this book is that you should separate the application from the user interface.
In the case of the shopping cart, this guideline still holds true. You create a simple framework for a shopping cart and then attach a user interface to it. The first thing you need to do is figure out how the shopping cart will work. The cart itself is nothing fancy; it is just a container of items.
Before you start writing the shopping cart, you should spend a little time on the items that go in the cart. You probably need some sort of name for the item, a price, and maybe a quantity. The quantity value is handy if you don't want to have multiple instances of the same item in your cart.
For instance, if you are ordering tires, you can either have four separate instances of a tire item, or have one tire item with a quantity of four. Listing It contains a name, a price, a quantity, and also an URL that refers to a description of the item.
It treats any two objects with the same name and cost as being equal. If they have different quantities, they are still considered equal. This is usually not a good idea, since it can lead to confusion, but in this particular instance, it works nicely.
If you have an item with some quantity value, you can search through the cart for the same object ignoring the quantities and if you find a matching object, you can just add their quantities together.
The next item on the agenda is the shopping cart itself. Since this is a very simple model of a cart, independent of the user interface, the cart should be observable. In other words, other objects should be able to watch the shopping cart to see when it changes. This allows you to write a user interface that updates itself whenever the cart is changed, yet you keep the user interface code out of the cart. The shopping cart is a subclass of the Observable class.
Whenever the cart changes, it sends a notification to its observers.