Bluej-NaiveTicket/TicketMachine.java

/**
 * TicketMachine models a naive ticket machine that issues
 * flat-fare tickets.
 * The price of a ticket is specified via the constructor.
 * It is a naive machine in the sense that it trusts its users
 * to insert enough money before trying to print a ticket.
 * It also assumes that users enter sensible amounts.
 *
 * @author David J. Barnes and Michael Kolling
 * @version 2008.03.30
 */


public class TicketMachine
{
    // The price of a ticket from this machine.
    private int price;
    // The amount of money entered by a customer so far.
    private int balance;
    // The total amount of money collected by this machine.
    private int total;
    // A discounted rate
    private int saving;
    //Number of tickets sold
    private int count;
    //average price of tickets
    private int mean;


    /**
     * Create a machine that issues tickets of the given price.
     * Note that the price must be greater than zero, and there
     * are no checks to ensure this.
     */

    public TicketMachine(int ticketCost)
    {
        price = ticketCost;
        balance = 0;
        total = 0;
    }

    /**
     * Return the price of a ticket.
     */
    public int getPrice()
    {
        return price;
    }

    /**
     * Return the amount of money already inserted for the
     * next ticket.
     */
    public int getBalance()
    {
        return balance;
    }

    public int getTotal() 
    {
        return total;
    }

    /* 
     * creates discounted price
     */
    public int discount(int discount)
    {
        return saving = price + discount;
    }

    /*
     * Calculates average cost of a ticket
     */
    public int mean()
    {
        return mean = total/count;
    }

    /*
     * Determines if there is enough money for tickets
     */
    public void budget(int canSpend) 
    {
        if (price>canSpend) {
            System.out.println("Too expensive, must be " + canSpend + " or less");}
        else {System.out.println("Just right!");
        }
    }

    /**
     * Receive an amount of money in cents from a customer.
     */
    public void insertMoney(int amount)
    {
        if (amount>0) {
            balance += amount;
        }
        else {
            System.out.println("Use a positive amount: " + amount);
        }
    }

    /**
     * Print a ticket.
     * Update the total collected and
     * reduce the balance to zero.
     */
    public void printTicket()
    {
        int amountLeftToPay = price-balance;
        if (amountLeftToPay<=0) {
            // Simulate the printing of a ticket.
            System.out.println("##################");
            System.out.println("# The BlueJ Line");
            System.out.println("# Ticket");
            System.out.println("# " + price + " cents.");
            System.out.println("##################");
            System.out.println();
            // Reduce the balance.
            balance = balance - price;
            // Update the total collected with the price.
            total = total + price;}
        else {
            System.out.println("You must insert at least: " + (price - balance) + " cents.");
        }
    }

    /*return the money in the balance
     * balance is cleared
     */
    public int refundBalance()
    {
        int refundAmount =balance;
        balance = 0;
        return refundAmount;
    }

    /*
     * Remove all money from machine 
     * total is cleared
     * returns amount you took from machine
     */
    public int emptyMachine()
    {
    int emptyAmount = total;
    total = 0;
    return emptyAmount;
    }
}