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 bank account.

 28        @param amount the amount to deposit

 29     */

 30     public void deposit(double amount)

 31     {  

 32        balance = balance + amount;

 33     }

 34  

 35     /**

 36        Withdraws money from the bank account.

 37        @param amount the amount to withdraw

 38     */

 39     public void withdraw(double amount)

 40     {   

 41        balance = balance - amount;

 42     }

 43  

 44     /**

 45        Gets the current balance of the bank account.

 46        @return the current balance

 47     */

 48     public double getBalance()

 49     {   

 50        return balance;

 51     }

 52  }