public class TicketMachine extends IntMain  
 {  
 // 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;  
 /**  
 * 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;  
 }  
 /**  
 * Receive an amount of money in cents from a customer.  
 */  
 public void insertMoney(int amount)  
 {  
   balance = balance + amount;  
 }  
 /**  
 * Print a ticket.  
 * Update the total collected and  
 * reduce the balance to zero.  
 */  
 public void printTicket()  
 {  
   // 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();  
   // Update the total collected with the balance.  
   total = total + balance;  
   // Clear the balance.  
   balance = 0;  
 }  
 }