+-------------------------+
| Item |
+-------------------------+
| - name: String |
| - price: double |
+-------------------------+
| + getName(): String |
| + getPrice(): double |
+-------------------------+
^
|
+--------+----------+-------------------+
| | | |
+------------------+ | +-----------------+ +-----------------+
| CD | | | Disk | | Instrument |
+------------------+ | +-----------------+ +-----------------+
| + sell(): void | | | + sell(): void | | + sell(): void |
+------------------+ | +-----------------+ +-----------------+
|
+-------------------------+
| Poster |
+-------------------------+
| + sell(): void |
+-------------------------+
+----------------------------------+ +------------------------------------+
| Sellable | | Discountable |
+----------------------------------+ +------------------------------------+
| <interface> | | <interface> |
| + sell(): void | | + applyDiscount(): double |
+----------------------------------+ +------------------------------------+
+----------------------------------+ +------------------------------------+
| Discount | | Order |
+----------------------------------+ +------------------------------------+
| - amount: double | | - item: Item |
| - type: String | | - discounts: Discount[] |
+----------------------------------+ +------------------------------------+
| + Discount(amount, type) | | + Order(item, discounts) |
| + calculateDiscount(price):double| | + applyDiscount(): double |
+----------------------------------+ +------------------------------------+
+----------------------------------+ +------------------------------------+
| Customer | | Payment |
+----------------------------------+ +------------------------------------+
| - name: String | | - method: String |
| - email: String | | - amountPaid: double |
+----------------------------------+ +------------------------------------+
| + getName(): String | | + processPayment(): void |
| + getEmail(): String | +------------------------------------+
+----------------------------------+
+----------------------------------+ +------------------------------------+
| InputDevice | | OutputDevice |
+----------------------------------+ +------------------------------------+
| - random: Random | | |
+----------------------------------+ | |
| + getType(): String | | + writeMessage(message: String) |
| + nextInt(): Integer | | + printArray<T>(array: T[]): void |
| + getLine(): String | +------------------------------------+
| + getNumbers(N: int): Integer[] |
+----------------------------------+
+-------------------------+
| MusicStoreSystem |
+-------------------------+
| <Main Class> |
+-------------------------+
| + main(args: String[]) |
+-------------------------+