Answer the following question?

1. Consider the class diagram provided in Figure 1. Name one method that is over-ridden in the EconomyTicket class. [1 mark]

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2. What does it mean to over-ride a method in java? [2 marks]

3. This question relates to the UML diagram provided in Figure 1.

4. Given the following 2 lines of code:
5. 1 TrainService ts = new TrainService(ByronBay, Central, 10:00);
6. concessionTkType = new TicketType(TicketType.CONCESSION);
7. State whether the following lines of code are valid or not: [3 x 1 marks]
8. Ticket tk = new Ticket(ts, concessionTkType);
9. ANS ____________________________________________________
10. FIrstClassTicket fct = new FirstClassTicket(ts, concessionTkType);
11. ANS ____________________________________________________
13. FirstClassTicket fctik = new Ticket(tk, concessionTkType);

14. ANS ____________________________________________________

15. For each of the above lines of code give a reason for why they are/are not valid [3 x 1 marks]
16. ANS

Ticket date Expiry: Date datelssued: Date service: Train Service ticketPrice: double ticketType: TicketType + getService(): TrainService + getTicketPrice(): double + issue Concession Ticket(): double + issue FullPrice Ticket(): double + issue Ticket(): double + print(): void setService (TrainService): void setTicketTypeTicketType): void + Ticket(TrainService, TicketType) + toString(): String Economy ClassTicket Economy ClassTicket(Train Service, TicketTyp + getTicketPrice(): double + toString(): String FirstClassTicket seatNumber: String SURCHARGE: double = 0.25 travelDate: Date + FirstClassTicket(TrainService, TicketType, Date + getTicketPrice(): double setSeatNumber(String): void setTravelDate(Date): void + toString(): String