A superclass Train has been defined to store the details of a train for booking tickets. Define a…

A superclass Train has been defined to store the details of a train for booking tickets. Define a subclass Booking to compute the total cost of the tickets based on the number of passengers and any discount for group bookings. The details of the members of both the classes are given below: Class name : Train Data members/instance variables: trainName : to store the name of the train trainNumber : to store the train number ticketPrice : to store the price of a single ticket in decimal Methods/Member functions: Train(...) : parameterised constructor to assign values to data members void displayDetails( ) : to display the train details Class name : Booking Data members/instance variables: numPassengers : to store the number of passengers for booking groupDiscount : to store the group discount percentage totalCost : to store the total cost after applying the group discount in decimal Methods/Member functions: Booking(...) : parameterised constructor to assign values to data members of both the classes void calCost( ) : to calculate the cost as per the formula (ticket price * numPassengers), apply a group discount of 10% if numPassengers is greater than 5 and calculate the total cost with discount, if any void displayDetails( ) : to display the train details, number of passengers, group discount and the total cost with discount, if any Assume that the superclass Train has been defined. Using the concept of Inheritance, specify the class Booking giving the details of the constructor(...), void calCost( ) and void displayDetails( ). The superclass, main function and algorithm need NOT be written.

class Booking extends Train
{
    int numPassengers;
    double groupDiscount;
    double totalCost;

    Booking(String tn, int tno, double tp, int np)
    {
        super(tn, tno, tp);
        numPassengers = np;
        groupDiscount = 0.0;
        totalCost = 0.0;
    }

    void calCost()
    {
        totalCost = ticketPrice * numPassengers;
        if (numPassengers > 5)
        {
            groupDiscount = 10.0;
            totalCost = totalCost - (totalCost * groupDiscount / 100);
        }
    }

    void displayDetails()
    {
        super.displayDetails();
        System.out.println("Number of Passengers: " + numPassengers);
        System.out.println("Group Discount: " + groupDiscount + "%");
        System.out.println("Total Cost: " + totalCost);
    }
}