BueJ

Håber vi kan få lidt support på denne opgave!!

Nedestående er udkastet til opgaven, vi har ændret i noget af det, vi har brug for nogle koder til public void sellCD, og requestCD



import java.util.*;
/**
* Abstract class Manager defines classes for managing
* customer orders for a CD, inventory and sales balance.
*
* @author J Ahlmann
* @version April 2003
*/
public abstract class Manager
{
    // instance variables
    protected int cdStock;
    protected final double cdPrice = 149.50;
    protected double total;
    protected ArrayList orders = new ArrayList();
   
    //     Sub-classes should implement 2 constructors:
    //     1. Takes no parameters and sets the cdStock variable
    //     to a fixed number.
    //     2. Takes an int paramter that sets the cdStock variable.
   
    //Mutator methods -------------------------------
   
    /**
    * Add an order object to the order list
    * @param Order a
    */
    abstract public void addOrder(Order a);
   
    /**
    * Add more CDs to the inventory: instance variable cdStock.
    * @param int newCDs
    */
    abstract public void requestCDs(int newCDs);
   
    /**
    * Register the sale of a CD:
    * 1. Check if there any CDs in stock:
    * if not,
    * print a message to wait for new deliveries.
    * else
    * 1. Delete the order from the Orders list.
    * 2. Add the price of a CD to the total variable.
    * @param int index of the customer order in the Orders list.
    */
    abstract public void sellCD(int index);

    //Print methods -----------------------------------
   
    /**
    * Print a list of all registered orders:
    * 1. Order number
    * 2. Customer name
    * 3. Customer telephone number
    * in a nice readable format.
    */
    abstract public void printOrders();
   
    /**
    * Print the following information:
    * 1. The number of CDs in stock.
    * 2. The number of registered orders
    * 3. The current balance in DKR (instance variable double total)
    * 4. If the number of orders is bigger than the number of CDs in stock,
    * you should print a prompt for the shop assistant to order more CDs
    * from the record company.
    *
    * All in a nice readable format...
    */
    abstract public void printStatus();
   
}