Implementing the CheckingAccount Class

• Overrides deposit and withdraw to increment the transaction count:

  public class CheckingAccount extends BankAccount
  {
     public void deposit(double amount) { . . . }
     public void withdraw(double amount) { . . . }
     public void deductFees() { . . . } // new method
     private int transactionCount;      // new instance field
  }

• Each CheckingAccount object has two instance fields:
  • balance (inherited from BankAccount)
  • transactionCount (new to CheckingAccount)
• You can apply four methods to CheckingAccount objects:
  • getBalance() (inherited from BankAccount)
  • deposit(double amount) (overrides BankAccount method)
  • withdraw(double amount) (overrides BankAccount method)
  • deductFees() (new to CheckingAccount)