Class DisplayScreen

java.lang.Object
  DisplayScreen

public class DisplayScreen
extends java.lang.Object

Represents the display screen and touch pad of a vending machine Also represents the controller of the program

Constructor Summary

DisplayScreen()
Constructs a new DisplayScreen object

Method Summary

void	displayOperatorOptions() Displays the options available for any Operator of the VendingMachine
void	displayProducts() Displays the Products in the VendingMachine to the user
void	displayWelcome() Displays the first screen to be seen by a user of this VendingMachine.
int	getOperatorChoice() Returns the Operator's choice (0 = "exit", 1 = "restock a product", 2 = "remove money")
void	operatorFailureToLogIn() Displays an error when someone fails to log in as a Operator, then restarts from the welcome screen
boolean	operatorLogin() Walks the Operator through the login process
void	operatorRemovesMoney() Removes all the coins from this VendingMachine object and reports number of coins removed to the Operator
void	operatorRestocksProduct() Allows an Operator to restock a particular Product
void	run() Runs the Vending Machine program
void	userPaysForProduct(int productIndexPlusOne) Allows the user to pay for a already-selected Product
int	userSelectsProduct() Allows the user to select a Product to purchase

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DisplayScreen

public DisplayScreen()

Constructs a new DisplayScreen object

Method Detail

displayWelcome

public void displayWelcome()

Displays the first screen to be seen by a user of this VendingMachine. Will determine if the user is a customer or an Operator of the machine.

operatorLogin

public boolean operatorLogin()

Walks the Operator through the login process

operatorFailureToLogIn

public void operatorFailureToLogIn()

Displays an error when someone fails to log in as a Operator, then restarts from the welcome screen

displayOperatorOptions

public void displayOperatorOptions()

Displays the options available for any Operator of the VendingMachine

getOperatorChoice

public int getOperatorChoice()

Returns the Operator's choice (0 = "exit", 1 = "restock a product", 2 = "remove money")

Returns:

the Operator's choice

operatorRestocksProduct

public void operatorRestocksProduct()

Allows an Operator to restock a particular Product

operatorRemovesMoney

public void operatorRemovesMoney()

Removes all the coins from this VendingMachine object and reports number of coins removed to the Operator

displayProducts

public void displayProducts()

Displays the Products in the VendingMachine to the user

userSelectsProduct

public int userSelectsProduct()

Allows the user to select a Product to purchase

Returns:

the Product selected by the user

userPaysForProduct

public void userPaysForProduct(int productIndexPlusOne)

Allows the user to pay for a already-selected Product

Parameters:

productIndexPlusOne - the selected Product code

run

public void run()

Runs the Vending Machine program