1 /**
2 A bank account has a balance and a mechanism for applying interest or fees at
3 the end of the month.
4 */
5 public class BankAccount
6 {
7 private double balance;
8
9 /**
10 Constructs a bank account with zero balance.
11 */
12 public BankAccount()
13 {
14 balance = 0;
15 }
16
17 /**
18 Makes a deposit into this account.
19 @param amount the amount of the deposit
20 */
21 public void deposit(double amount)
22 {
23 balance = balance + amount;
24 }
25
26 /**
27 Makes a withdrawal from this account, or charges a penalty if
28 sufficient funds are not available.
29 @param amount the amount of the withdrawal
30 */
31 public void withdraw(double amount)
32 {
33 balance = balance - amount;
34 }
35
36 /**
37 Carries out the end of month processing that is appropriate
38 for this account.
39 */
40 public void monthEnd()
41 {
42 }
43
44 /**
45 Gets the current balance of this bank account.
46 @return the current balance
47 */
48 public double getBalance()
49 {
50 return balance;
51 }
52 }