Loyolo is running a local spaza shop, he is building a vending machine that he wants to install at a friends BraaiShop.
He wants you to write him some software for this vending machine project of his.
Create a vending package and create all your classes in there.
Write a Java class called OverloadedVendingMachine that have overloaded buy methods that takes in an instances of the various sub types of the Product class.
| methods | description |
|---|---|
| void buy(SoftDrink softdrink) | buy 1 SoftDrink |
| void buy(SaltySnack saltySnack) | buy 1 SaltySnack |
| void buy(Chocolate chocolate) | buy 1 Chocolate |
| void buy(Product product) | buy 1 of each product |
Buying a product decrease the number of products in stock by one. The stock level for a product can’t be negative.
The OverloadedVendingMachine class should have a constructor that takes in the initial stock levels for SoftDrinks, SaltySnacks & Chocolates.
The class should store the stock level for each product in a private instance variable .
// add a constructor like this to you OverloadedVendingMachine class
OverloadedVendingMachine(int softDrinkQty, int saltySnacksQty, int chocolatesQty){
// set the stockLevel instance variables for each product in the constructor
}
There are three products:
- SoftDrinks
- SaltySnacks
- Chocolates
Create the Product classes in a the vending.product package.
Create a class for each product, each of these products is a sub class of the Product class which have a description method.
Class names should not be plural. Each class should have a description overriding the description method of Product.
The Product class looks like this:
class Product {
public String description() {
return "This is a product";
}
}
Overloaded addStock methods adds stock for a given product type.
Each time an addStock method is called new items should be added for the Product type in question.
It’s method signature are:
| method | description |
|---|---|
| void addStock(SoftDrink softdrink) | add 1 SoftDrink to stock |
| void addStock(SaltySnack saltySnack) | add 1 SaltySnack to stock |
| void addStock(Chocolate chocolate) | add 1 Chocolate to stock |
| void addStock(Product product) | add 3 stock items for each Product type. |
An overloaded getStock methods returns the Stock level for each Product type.
- int getStock(SoftDrink softdrink)
- int getStock(SaltySnack saltySnack)
- int getStock(Chocolate chocolate)
- int getStock() - return the total number of items in stock for all 3 different Product types.
- The OverloadedVendingMachine should keep track of the number of each product type it has in stock.
- Create a main method that takes your new OverloadedVendingMachine vending machine through it’s paces.
- Create JUnit tests that tests your Vending Machine.
- Commit your code the GitHub using a repository called TheVendingMachine & share with the mentors
- Commit the GitHub regularly.
- create a buy method that allows you to specify how many of a certain Product you want to buy
- create a addStock method that allows you to specify how many of a certain Product you want to add to stock.