5. For the next four problems, consider the task of representing types of ticket

Question

5. For the next four problems, consider the task of representing types of tickets to campus events. Each ticket hasa unique number and a price. There are three types of tickets: walk-up tickets, advance tickets, and student advance tickets. Figure 9.10 illustrates the types: Walk-up tickets are purchased the day of the event and cost $50 Advance tickets purchased 10 or more days before the event cost $30, and advance tickets purchased fewer than 10 days before the event cost S40. Student advance tickets are sold at half the price of normal advance tickets: When they are purchased 10 or more days early they cost $15, and when they are purchased fewer than 10 days early they cost $20 Implement a class called Ticket that will serve as the superclass for all three types of tickets. Define all common operations in this class, and specify all differing operations in such a way that every subclass must implement them No actual objects of type Ticket will be created: Each actual ticket will be an object of a subclass type. Define the following operati ions: The ability to construct a ticket by number The ability to ask for a ticket's price. ·The ability to print In a ticket object as a string. An example string would be "Number: 17, Price: 50·0" Ticket Ticket(number) getPrice0 toString0 Walkup Ticket Advance Ticket Student Advance Ticket Figure 9.10 Classes of tickets that are available to campus events 644 Chapter 9 Inheritance and Interfaces 6. Implement a class called WalkupTicket to represent a walk-up event ticket. Walk-up tickets are also constructed by number, and they have a price of S50 7. Implement a class called AdvanceTicket to represent tickets purchased in advance. An advance ticket is con structed with a ticket number and with the number of days in advance that the ticket was purchased. Advance tickets purchased 10 or more days before the event cost $30, and advance tickets purchased fewer than 10 days before the event cost $40 8. Implement a class called StudentAdvanceTicket to represent tickets purchased in advance by students. A student advance ticket is constructed with a ticket number and with the number of days in advance that the ticket was pur- chased. Student advance tickets purchased 10 or more days before the event cost $15, and student advance tickets purchased fewer than 10 days before the event cost $20 (half of a normal advance ticket). When a student advance ticket is printed, the string should mention that the student must show his or her student ID (for example, "Number: 17, Price: 15.0 (ID required) ").

Explanation / Answer

Ticket.java

public abstract class Ticket {

    private int number;
    protected double price;
   
    public Ticket(int number) {
        this.number = number;
    }
   
    public double getPrice() {
        return price;
    }
   
    public String toString() {
        return "Number "+number+", price: "+price;
    }
   
    public static void main(String[] args) {
        // Some testing code
        Ticket sat = new StudentAdvanceTicket(1,11);
        Ticket satLate = new StudentAdvanceTicket(2,9);
        Ticket wt = new WalkupTicket(3);
        Ticket at = new AdvanceTicket(4,10);
        System.out.println("price of ticket purchased 10 days in advance: "+at.getPrice());
        System.out.println(sat);
        System.out.println(satLate);
        System.out.println(wt);
        System.out.println(at);

    }

}

-------------------------------

AdvanceTicket.java

public class AdvanceTicket extends Ticket {

    public AdvanceTicket(int number,int daysInAdvance) {
        super(number);
        if (daysInAdvance < 10) {
            price = 40;
        } else {
            price = 30;
        }
    }

}

----------------------------------

StudentAdvanceTicket.java

public class StudentAdvanceTicket extends AdvanceTicket {

    public StudentAdvanceTicket(int number, int daysInAdvance) {
        super(number, daysInAdvance);
        price = price/2;
    }

}

--------------------------------

WalkupTicket.java

public class WalkupTicket extends Ticket {

    public WalkupTicket(int number) {
        super(number);
        price = 50;
    }

}

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