Question

You are tasked to design an application to keep track of sales for your company. Sales should be tracked for two types of accounts: supplies and services. Complete the following:

    Create a UML class diagram for the Account inheritance hierarchy. Your subclasses should be Supplies and Services.
    All sales accounts will have an account ID (accountId).
    You will need attributes to keep track of the number of hours (numberOfHours) and rate per hour of services provided (ratePerHour).
    You should also keep track of the number of items sold (numberOfItems) and the price per item for the sold supplies (pricePerItem).
    All classes should have a constructor.
    Add getters and setters to all of your classes.
    Override the method toString in all 3 classes.
    Add a method to calculate the sales in each class [calculateSales()].

Submit your UML diagram in a zip file.

This Submission Node will demonstrate the following:

•     How to create a class diagram
•     Understanding of inheritance

Answer 1

class Sales
{
    private int accountId;
   
    public Sales(int accountId)
    {
        this.accountId = accountId;
    }
    public String toString()
    {
        return "Sales : AccountId : "+accountId;
    }
    public void setAccountId(int accountId)
    {
        this.accountId = accountId;
    }
    public int getAccountId()
    {
        return accountId;
    }
}
class Supplies extends Sales
{
private int numberOfHours;
private double ratePerHour;
  
public Supplies(int accountId,int numberOfHours,double ratePerHour)
{
   super(accountId);
   this.numberOfHours = numberOfHours;
   this.ratePerHour = ratePerHour;
}
   
    public String toString()
    {
        return "Supplies : Number of hours : "+numberOfHours +" Rate per hour : "+ratePerHour;
    }
    public double calculateSales()
{
   return numberOfHours * ratePerHour;
}
public void setNumberOfHours(int numberOfHours)
{
   this.numberOfHours = numberOfHours;
}
public int getNumberOfHours()
{
   return numberOfHours;
}
public void setRatePerHour(double ratePerHour)
{
   this.ratePerHour = ratePerHour;
}
public double getRatePerHour()
{
   return ratePerHour;
}
}

class Services extends Sales
{
   
private int numberOfItems;
private double pricePerItem;
  
public Services(int accountId,int numberOfItems,double pricePerItem)
{
   super(accountId);
   this.numberOfItems = numberOfItems;
   this.pricePerItem = pricePerItem;
}
  
public String toString()
{
   return "Services: Number Of Items : "+numberOfItems +" Price per Item : "+pricePerItem;
}
public double calculateSales()
{
   return numberOfItems * pricePerItem;
}public void setNumberOfItems(int numberOfItems)
{
   this.numberOfItems = numberOfItems;
}
public int getNumberOfItems()
{
   return numberOfItems;
}
public void setPricePerItem(double pricePerItem)
{
   this.pricePerItem = pricePerItem;
}
public double getPricePerItem()
{
   return pricePerItem;
}
   
}

  
  
class TestSales
{
   public static void main (String[] args)
   {
       Supplies supp = new Supplies(1234,34,4.5);
      
       System.out.println(supp);
      
       Services serv = new Services(4556,6,16.5);
      
       System.out.println(serv);
   }
}

Output:

Supplies : Number of hours : 34 Rate per hour : 4.5
Services: Number Of Items : 6 Price per Item : 16.5

UML

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