import java.util.*;
import java.awt.*;

import Exceptions;

//
// Generic Account class
//
abstract class Account {
   // Account name - only accesible through the generic Account class
   protected String name;

   // last date when interest was computed
   protected int date;

   // the balance and interest value for the current account
   protected double balance;
   protected double interest;

   // output area
   TextArea output;

   // Account constructor
   Account(String accountname, double accountinterest, TextArea out) throws NoNameException
      { name=new String(accountname);
	if(name.equals("")) throw new NoNameException();

	balance=0.0f; // when creating an account it has a balance of 0$!
	date=1;	// each account is considered as opened on the 1st of
		// each month. These are actually "virtual" months in order
		// to avoid paying the month interest to an account opened
		// on 31st, for example
	interest=accountinterest;
	output=out;
      }

   abstract void Deposit(double amount)  throws NegativeAmountException,InvalidDepositException;
   abstract void Withdraw(double amount) throws NoExtraCreditException,NegativeAmountException, CDNegativeBalanceException,MinBalanceException;
   abstract void Output();

   final String Name() { return (name); }
   final double Balance() { return (balance); }

   private protected abstract void ComputeInterest();

   abstract void Update();
}