public void transfer(int fromCode, int toCode, int date, double value)
			throws InvalidCode, InvalidValue {
		if (!accounts.containsKey(fromCode) || !accounts.containsKey(toCode)) {
			throw new InvalidCode();
		}
		// double s = accounts.get(fromCode).getValue();
		// double s = accounts.get(fromCode).getBalance();
		// if (s > accounts.get(toCode).getValue()) {

		// if (value > s) {
		if (value > accounts.get(fromCode).getBalance()) {
			throw new InvalidValue();
		} else {
			// double t = accounts.get(toCode).getValue();
			// double t = accounts.get(toCode).getBalance();
			// double t;
			// t = s- value;
			accounts.get(fromCode).subtractFromBalance(date, value);
			// accounts.get(toCode).addToBalance( value);
			accounts.get(toCode).addToBalance(date, value);
			// t += s;

		}

	}