public class Car { /** This car's identifier. */ private int id; /** * true == this car is a business-class car, * false == this car is an economy-class car. */ private boolean businessClass; /** The cost of a business class seat, in dollars. */ public static final double BUSINESS_SEAT_COST = 125.0; /** The cost of an economy class seat, in dollars. */ public static final double ECONOMY_SEAT_COST = 50.0; /** The number of seats in a business class car. */ public static final int BUSINESS_SEATS = 30; /** The number of seats in an economy class car. */ public static final int ECONOMY_SEATS = 40; /** The list of this car's seats. */ private Seat[] seats; /** * Constructs a new Car object with the specified id. * If parameter isBusinessClass is true, the car is a business-class * car. If parameter isBusinessClass is false, the car is an * economy-class car. */ public Car(int carId, boolean isBusinessClass) { id = carId; businessClass = isBusinessClass; if(businessClass) { seats = new Seat[BUSINESS_SEATS]; for(int i = 0; i < BUSINESS_SEATS; i++) { seats[i] = new Seat(i+1, BUSINESS_SEAT_COST); } } else { seats = new Seat[ECONOMY_SEATS]; for(int i = 0; i < ECONOMY_SEATS; i++) { seats[i] = new Seat(i+1, ECONOMY_SEAT_COST); } } }

/** * Returns this car's list of seats. This method is intended for * testing purposes only, and should not be called by other objects, * as it may be removed from the final version of this class. * * @return The seats in this car, an array of Seat objects. */ public Seat[] seats() { return seats; } /** * Returns true if this is a business-class car, * false if this is an economy-class car. */ public boolean isBusinessClass() { return businessClass; } /** * Returns the id of this car. */ public int id() { return id; } /** * This method is called when the specified seat has been booked, * to print a ticket for that seat. * * @param seatNo The integer identifier of the seat. */ private void printTicket(int seatNo) { System.out.println("Car ID: " + id); System.out.println("Seat number: " + seatNo); System.out.println("Price: "); if (businessClass) { System.out.println(BUSINESS_SEAT_COST); } else { System.out.println(ECONOMY_SEAT_COST); } } /** * Attempts to book a seat. If successful, this method prints a * ticket and returns true. * If no seats are available, this method returns false. */ public boolean bookNextSeat() { for(int i = 0; i < seats.length; i++) { if(!(seats[i].isBooked())) { seats[i].book(); printTicket(seats[i].number()); return true; } } return false; }

/** * Cancels the booking for the specified seat, which must be between * 1 and the maximum number of seats in the car. * If the seat number is valid and if the seat has been reserved, this * method cancels the booking for that seat and returns true. * If the seat number is not valid, this method returns false. * If the seat number is valid, but the seat has not been reserved, * this method returns false. */ public boolean cancelSeat(int seatNo) { if(seatNo >= 1 && seatNo <= seats.length) { if(seats[seatNo-1].isBooked()) { seats[seatNo-1].cancelBooking(); return true; } } return false; } }

Create a UML Class Diagram for Car class. do not have to include the details of the Seat class.