Java™ How to Program, Seventh Edition

M.12. Class Deposit

Class Deposit (Fig. M.11) extends Transaction and represents a deposit ATM transaction. Recall from the class diagram of Fig. 10.22 that class Deposit has one attribute amount, which line 6 implements as an int field. Lines 7–8 create reference-type attributes keypad and depositSlot that implement the associations between class Deposit and classes Keypad and DepositSlot modeled in Fig. 10.21. Line 9 declares a constant CANCELED that corresponds to the value a user enters to cancel. We will soon discuss how the class uses this constant.

Figure M.11. Class Deposit represents a deposit ATM transaction.

1 // Deposit.java 2 // Represents a deposit ATM transaction 3 4 public class Deposit extends Transaction 5 { 6 private double ...