Java Exercises (Inheritance)

Week 2 Challenge

Exercise 1 Tasks

1. Implement a base class Account with the following fields owner:String, balance:Double, numberOfTransactions:int
2. Provide suitable constructor(s), the methods withdraw and deposit.
3. Write a tester method that uses all the methods of the class and displays suitable messages
4. Implement a subclass StoreAccount, using as base the Account class with the following extra fields storeName:String, accountCategory:string
5. Provide suitable constructor(s), the methods withdraw and deposit, changeCategory
6. To test the methods, write a method that uses all the methods of the class and displays suitable messages Note: categories are basic, mid, extra, premium.

Exercise 2

1. Define a POJO class Product with the following fields id: int , name:string , priceWhenBuy:double, priceWhenSell:double

2. Create an interface for the Store called IStore signatures of desired methods buy(Product), sell(Product), getRevenue():double

3. Create an implementation of IStore named SimpleRetailStore is a store that keeps no Inventory. Fields: totalBuyBalance:double, totalSellBalance :double Create the suitable methods so that main method in the Main class will be the following: Product x1 = new Product(1, "Painting Picasso. Guernica", 100, 1000); Product x2 = new Product(2, "Painting Tsarouxis. Naftis A", 200, 2000); Product x4 = new Product(3, "Chair. Luis XV", 100, 1000); IStore simple= new SimpleRetailStore(); simple.buy(x1); simple.buy(x4); simple.sell(x1); System.out.println(simple.getRevenue());

4. Create another implementations of IStore named InventoryRetailStore is a store that has detailed Inventory. The event buy adds to Inventory and sell removes from Inventory Fields: List Methods: getInventory(), reset() Create the suitable methods so that main method in the Main class will be the following: Product x1 = new Product(1, "Painting Picasso. Guernica", 100, 1000); Product x2 = new Product(2, "Painting Tsarouxis. Naftis A", 200, 2000); Product x4 = new Product(3, "Chair. Luis XV", 100, 1000); IStore invStore = new InventoryRetailStore(); invStore.buy(x1); invStore.buy(x4); invStore.sell(x1); System.out.println(invStore.getRevenue()); invStore.sell(x2); invStore.getInventory();