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Private Account
1 package bankaccount;
2
3 class Account {
4 private int accountNo;
5 private double balance;
6 private String accountName;
7
8 Account(int accountNo, String accountName, double balanc
e) {
9 this.accountNo = accountNo;
10 this.accountName = accountName;
11 this.balance = balance;
12 }
13
14 public double withdraw(double amount) {
15 if (balanceCleared(amount)) {
16 balance = balance - amount;
17 } else {
18 System.out.println(''Insufficient Funds");
19 }
20 return balance;
21 }
22
23 private boolean balanceCleared(double amount) {
24 if (balance - amount >= 0) {
25 return true;
26 } else {
27 return false;
28 }
29 }
30 }
Private Account
Consider the following statements issued from another class in the bankaccount package:
Account fredsAccount = new Account(123, "Fred", 60);
if (fredsAccount.balanceCleared(20) ) System.out.println("OK");
fredsAccount.accountName = "FRED";
The first statement is legal because the Account constructor has the package access
level by default. The second statement is illegal because the balanceCleared method in
the Account class has private access level. The third statement is also illegal because
the accountName variable is private. A program containing the second and third
statements will not compile.