// Subtract given amount of money, returning a new amount of money
public Money subtract(Money money) {
// if (amount.compareTo(money.getAmount()) < 0){
// System.out.println("the amount withdraw is greater than the amount in the account!");
// return new Money(amount);
// }
return new Money(amount.subtract(money.getAmount()));
}
// Add given amount of money, return a new amount of money
public Money add(Money money) {
return new Money(amount.add(money.getAmount()));
}