Question: Assume that we change the CreditCard class (see Code Fragment 1.5) so that instance variable balance has private visibility. Why is the following implementation of

Assume that we change the CreditCard class (see Code Fragment 1.5) so that instance variable balance has private visibility. Why is the following implementation of the PredatoryCreditCard.charge method flawed?

public boolean charge(double price) { boolean isSuccess = super.charge(price); if (lisSuccess) charge(5); return isSucce

public boolean charge(double price) { boolean isSuccess = super.charge(price); if (lisSuccess) charge(5); return isSuccess; // the penalty

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