Creating a TicketMachine object and using functions of the object class.

Program Plan:

Write a JAVA program to create an object of the class TicketMachine with the main function and the required set of statements to accomplish the following:

Use of the getPrice method to check the return value containing the price of a ticket

Use of insertMoney to inserting money into the machine

Check the balance using getBalance method to keep an accurate record of the money.

Generate a ticket using printTicket method when inserted enough money.

Program Description:

The following JAVA program prompts the user to insert enough money to a TicketMachine before trying to print a ticket.

Program:

// TicketMachine is a working model of the ticket printing machine.

// Through constructor, the price of the ticket is passed.

// For printing tickets, enough money has to be entered into the machine.

class TicketMachine

{

// Cost per ticket.

private int price;

// Customer entered amount.

private int balance;

// The amount present in the machine.

private int total;

// Constructor to take and initialized the price of the ticket.

public TicketMachine(int cost)

{

// Cost of ticket allocated.

price = cost;

//declaring the value of variable

balance =0;

//declaring the value of variable

total = 0;

}

// Gets the ticket price

public int getPrice()

{

//return the value of price

return price;

}

// declaring the nee method .

public int getBalance()

{

//return the value of balance.

return balance;

}

// decaling method for money

public void insertMoney(int amount)

{

//add the balance

balance = balance + amount;

}

//Ticket has to be printed.

// Update the total money present in the machine and change the balance for // next ticket to zero.

public void printTicket()

{

//message for printing of a ticket.

System.out.println(“###################�);

//message for printing of a ticket.

System.out.println(“# The Bluej line�);

//message for printing of a ticket.

System.out.println(“# Ticket�);

//message for printing of a ticket.

System.out.println(“# “+ price + “ cents.�);

//message for printing of a ticket.

System.out.println(“###################�);

//message for printing of a ticket.

System.out.println();

// Total money is update for the machine.

total = total + balance;

// balance is cleared for the next ticket.

balance = 0;

}

}

/&

The main class which has the main method to create and

call the object of the TicketMachine.

*/

public class Main

{

// Main method to call the methods

public static void main(String[] args) {

/**

Creating object 'obj' of class TicketMachine.

and the cost of the ticket = 1000.

*/

TicketMachine obj = new TicketMachine(1000);

// To see the price of the ticket

System.out.println("The price of the ticket = " + obj.getPrice());

// Inserting amount into the TicketMachine.

obj.insertMoney(1000);

// Checking for the balance in the TicketMachine.

System.out.println("Balance = " + obj.getBalance());

/&

Balance should be enough to print the ticket

Assuming that cost of ticket is 1000.

*/

if(obj.getBalance()>=1000)

{

// Print the ticket

obj.printTicket();

}

// Checking the balance is increasing on inserting more money .

obj.insertMoney(100);

System.out.println("New Balance = " + obj.getBalance());

}

}

Objects First with Java: A Practical Introduction Using BlueJ (6th Edition), Chapter 2, Problem 1E