Suppose that the invoice-printing application from section 12.3 needs to be enhanced by including the computation and printing of sales taxes as needed. Since some vendors charge no sales taxes, the original Invoice class needs to be preserved. Select the code segment that best illustrates reuse of the existing Invoice class. public class TaxableInvoice ___________________________ A) extends Invoice { … } B) { Private Invoice originalInvoice; … } C) implements Invoice { … } D) { Private ArrayList invoices; … }

Question

Suppose that the invoice-printing application from section 12.3 needs to be enhanced by including the computation and printing of sales taxes as needed. Since some vendors charge no sales taxes, the original Invoice class needs to be preserved. Select the code segment that best illustrates reuse of the existing Invoice class. public class TaxableInvoice ___________________________
A) extends Invoice
{
…
}
B) {
Private Invoice originalInvoice;
…
}
C) implements Invoice
{
…
}
D) {
Private ArrayList<Invoice> invoices;
…
}

Quizplus · Accepted Answer

Extending the Invoice class allows the TaxableInvoice class to inherit its properties and methods, enabling reuse and enhancement without altering the original class.

Suppose That the Invoice-Printing Application from Section 12