Server Implementation

import java.rmi.server.*;

public class Account_Impl extends UnicastRemoteObject implements Account {
  private Money _balance;
  public Account_Impl(Money startingBalance)
    throws RemoteException {
    _balance = startingBalance;
  }

  public Money getBalance()
    throws RemoteException {
    return _balance;
  }

  public void makeDeposit(Money amount)
    throws RemoteException, NegativeAmountException {
    checkForNegativeAmount(amount);
    _balance.add(amount);
    return;
  }

  public void makeWithdrawal(Money amount)
    throws RemoteException, OverdraftException, NegativeAmountException {
    checkForNegativeAmount(amount);
    checkForOverdraft(amount);
    _balance.subtract(amount);
    return;
  }

  private void checkForNegativeAmount(Money amount)
    throws NegativeAmountException {
    int cents = amount.getCents();

    if (0 > cents) {
      throw new NegativeAmountException();
    }
  }

  private void checkForOverdraft(Money amount)
    throws OverdraftException {
    if (amount.greaterThan(_balance)) {
      throw new OverdraftException(false);
    }
    return;
  }
} 

• Extends UnicastRemoteObject