      1  /**

      2     A bank account has a balance that can be changed by

      3     deposits and withdrawals.

      4  */

      5  public class BankAccount

      6  {

      7     private double balance;

      8

      9     /**

     10        Constructs a bank account with a zero balance.

     11     */

     12     public BankAccount()

     13     {

     14        balance = 0;

     15     }

     16

     17     /**

     18        Constructs a bank account with a given balance.

     19        @param initialBalance the initial balance

     20     */

     21     public BankAccount(double initialBalance)

     22     {

     23        balance = initialBalance;

     24     }

     25

     26     /**

     27        Deposits money into the account.

     28        @param amount the amount of money to withdraw

     29     */

     30     public void deposit(double amount)

     31     {

     32        balance = balance + amount;

     33     }

     34

     35     /**

     36        Withdraws money from the account.

     37        @param amount the amount of money to deposit

     38     */

     39     public void withdraw(double amount)

     40     {

     41        balance = balance - amount;

     42     }

     43

     44     /**

     45        Gets the account balance.

     46        @return the account balance

     47     */

     48     public double getBalance()

     49     {

     50        return balance;

     51     }

     52  }

     53