Inheritance - Java Concepts - page 629

36 */
37 public void deductFees()
38 {
39 if (transactionCount > FREE_TRANSACTIONS)
40 {
41 double fees = TRANSACTION_FEE *
42 (transactionCount -
FREE_TRANSACTIONS);
43 super .withdraw(fees);
44 }
45 transactionCount = 0
46 }
47
48 private int transactionCount;
49
50 private static final int FREE_TRANSACTIONS
= 3 ;
51 private static final double TRANSACTION_FEE
= 2.0 ;
52 }

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459

ch10/accounts/SavingsAccount.java

1 /**
2 An account that earns interest at a fixed rate.
3 */
4 public class SavingsAccount extends BankAccount
5 {
6 /**
7 Constructs a bank account with a given interest rate.
8 @param rate the interest rate
9 */
10 public SavingsAccount( double rate)
11 {
12 interestRate = rate;
13 }
14
15 /**
16 Adds the earned interest to the account balance.
17 */
18 public void addInterest()
19 {
20 double interest = getBalance() *
interestRate / 100 ;