subject

Devise another class, Billfold, which contains slots for two cards, card1 and card2, a method void addCard(Card) and a method String formatCards(). The addCard method checks whether card1 is null. If so, it sets card1 to the new card. If not, it checks card2. If both cards are set already, the method has no effect. Of course, formatCards invokes the format method on each non-null card and produces a string with the format [card1|card2] 5. Write a tester program that adds two objects of different subclasses of Card to a Billfold object. Test the results of the formatCards methods. 6. Explain why the output of your BillfoldTester program demonstrates polymorphism. 7. The Card superclass defines a method isExpired, which always returns false. This method is not appropriate for the driver license. Supply a method header and body for DriverLicense. isExpired() that checks whether the driver license is already expired (i. e., the expiration year is less than the current year). To work with dates, you can use the methods and constants supplied in abstract class Calendar which are inherited by the concrete class GregorianCalendar. You create a Calendar as follows: GregorianCalendar calendar

ansver
Answers: 3

Another question on Computers and Technology

question
Computers and Technology, 22.06.2019 01:30
What kind of motivation is katrina showing? use the drop-down menu to complete the statement. katrina is using motivation because she is personally interested in learning more.
Answers: 2
question
Computers and Technology, 23.06.2019 03:00
State 7 common key's for every keyboard
Answers: 1
question
Computers and Technology, 23.06.2019 22:00
Jackson, who works in the finance department of a company, is holding a seminar for other employees on how to file taxes. only three employees sign up to attend the seminar. which device can he use to share his presentation with a group of three employees?
Answers: 1
question
Computers and Technology, 24.06.2019 00:00
Visualizing a game of “tag” to remember the meaning of contagious
Answers: 3
You know the right answer?
Devise another class, Billfold, which contains slots for two cards, card1 and card2, a method void a...
Questions