// Fig. 3.13: Account.java
// classe Account com um construtor para
// inicializar a variável de instância balance.

public class Account
{   
   private double balance; // variável de instância que armazena o saldo

   // construtor
   public Account( double initialBalance )
   {
      // valida que initialBalance é maior que 0,0;
      // se não, o saldo é inicializado como o valor padrão 0.0
      if ( initialBalance > 0.0 ) 
         balance = initialBalance; 
   } // fim do construtor Account

   // credita (adiciona) uma quantia à conta
   public void credit( double amount )
   {      
      balance = balance + amount; // adiciona quantia ao saldo
   } // fim do método credit

   // retorna o saldo da conta
   public double getBalance()
   {
      return balance; // fornece o valor de saldo ao método chamador
   } // fim do método getBalance

} // fim da classe Account


/**************************************************************************
 * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. All Rights Reserved.                           *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/