3332 9/17/02
ECE - Project 1 Fall 2002 In this project, you will design a set of objects that represent items that can be bid on at an online auction. 1. auction package Name your project directory lastnameP1, where lastname is your last name. For example, mine would be gloverP1. Create an auction subdirectory in your project directory. 2. Items In your project directory (in the default unnamed package), design one superclass and two subclasses of items. For example, you might have a Hat class, with two subclasses such as SailorHat and BaseballCap (those are mine, you choose something else!). Make sure each item has a couple of subclass-specific attributes and behavior, plus some attributes and behavior inherited from the superclass. One attribute of every item should be an appropriately descriptive common name (for example, "Sailors Hat"), which should be set at the time the item is instantiated and should be unchangeable by external objects. Each subclass should have a toString() method that returns a string, suitable for printing but without line terminators, describing the items attributes and their values. Make careful decisions on where methods and variables should be (superclass or subclass) and which should be private, public, etc. 3. AuctionItem class Design a general auction.AuctionItem class (in the auction package). It will be used to represent (point to, contain) an item when it is sent to the auction. Provide your class with methods to: - store and return a reference to the item being sold. - store and return the minimum acceptable price of the item (an integer number of dollars). - store and return the current price of the item (an integer number of dollars). - return a string, suitable for printing, describing the item. - store and return an integer item number (initially zero). 4. UHBay Design an auction.UHBay class (in the auction package) that receives items to be auctioned and accepts bids on the items. UHBay should initially have methods to: - Receive an instance of AuctionItem to be auctioned. UHBay should assign the item the next available number item and then store it internally. This method should return the item number assigned. - Return an Iterator of all auction items available for bidding. - Receive a bid on an item (by item number), returning a boolean value indicating whether the bid was accepted or not (it should be rejected if it is not greater than the current price, or if there is no item with that number). Of course, if the bid is accepted, the items current price should be updated to the new bid price. 5. Main Create a Main class in the default unnamed package. It contains the main() method and should prompt for commands, then accept commands from the user at the keyboard to: - Sell one your items, specifying which item (e.g., "sailorhat" or "baseballcap"), and the minimum price you will accept for it. Make sure that the user is told, somehow, what the choices are! Instantiate the appropriate item and send it to UHBay in an AuctionItem object.
9/17/02
List the items currently available for purchase at UHBay, including their item numbers, current prices, and full descriptions. Format the list so that it is readable! - Bid on an item, specifying the item number and bid price. This command should reply to the user, confirming that the bi...