public class driver {

public static void main(String[] args) {

//////////////////////////////////////////////////

//Q0: Make sure that you are able to run the driver class and see the Vending Machine in action

VendingMachine vm = new VendingMachine(5, 1, "Water");

// Enter the sufficient change

vm.Vend();

// enter insufficient change

vm.Vend();

// Q1: Make this VM vend Pepsi for you by changing above code

//////////////////////////////////////////////////

//Q6: test out your canadian vending machine by editing the code above!

}

}

******************************************************************************************************************* ////////////////////////////////////

//Write a class that extends the Vending Machine class to a vending machine that only vends Pepsi

public class pepsi_VendingMachine extends VendingMachine {

// Q:1 how would tweak the parent's constructor so that it can only vend pepsi? fill it in below

private String product;

public pepsi_VendingMachine( , )

{

}

//Q2: write the getters and setters using the parent class' getters and setters.

// Hint: use "super" key word to get the parent class' constructors

// Hint: In eclipse, type "get" and then press ctr+tab ;)

// see if that works for "set" :P

// Q3:Complete the following class method to print how many bottles this vending machine would have

public int count_bottles(){

int count = 0;

// write your code here

// hint: look at status method

return count;

}

// Q4: Write a method to clear all the VendingMachine money at the end of the day.

}

************************************************************************************************************

public class Canadian_VendingMachine {

// This class is an extension of VendingMachines in Canada, in a US embassy.

// Q5: Now, the original Vending Machine was made in US and all the currency was set to USD.

// But in Canada, we need to convert USD to CAD.

// %(a)One USD = 1.31 CAD, with conversion rate. write a getter and setter for it

private double conv;

public double getConv(){

// code here

}

public void setConv(double rate){

}

// Here is what should happen:

//1. Price is displayed in USD and CAD both

//2. Customer gets a choice which currency to pay in

//3. Customer gets the change money in the currency he chose for

//4. The vending machine should always store the money in USD

// For this to happen, first ask customer which CurrencyIn they would like to pay.

// 5(c) Hence, override the currencyIn method

public String currencyIn(){

//5(b)) this requires some getters! Write them first!

// correct the following line

System.out.println("The price of a "+type+" is "+price+" USD");

System.out.println("which is "+getConv+ "CAD");

System.out.println("How would you like to pay? USD or CAD? Please enter your response");

String curr = "USD";

// ask user for the response using scanner

// Store it in curr

return curr;

}

// Now, you will have to override the pay() method from parent

public double pay() {

String curr = this.currencyIn();

// 5(d)getMoneyFromCustomer() is a super class method. So edit the following line to call that

double customerMoney = ?.getMoneyFromCustomer();

// get the price per bottle in the given country's currency.

// 5(e) edit the following line with getPrice, and exchange rate, and call exchangePrice from parent

double unitprice = ?.exchangePrice(curr, ?, this.conv);

// 5(f) getChangeis a super class method. So edit the following line to call that

double change = ?.getChange(unitprice, customerMoney);

// if customer added insufficient money, the change would be the amount customer paid to, and in that case we don't want to wend anything

if (change - customerMoney != 0.0){

// yes, customer did give sufficient money

//5(g)the price here should be in USD

?.addVendingMachineMoney(?.price);

return change;

}

return -1;

}

} ***********************************************************************************************

import java.util.Arrays; import java.util.*;

public class VendingMachine { /////////////////////////////////////////////////////////////////////////// private String type; private String [] stuff; private double machineMoney; private double price; private int capacity = 0; /////////////////////////////////////////////////////////////////////////// // getters public int getCapacity() { return capacity; } public double getMachineMoney() { return machineMoney; } public double getPrice() { return price; } public String[] getStuff() { return stuff; } public String getType() { return type; } /////////////////////////////////////////////////////////////////////////// //setters protected void setCapacity(int capacity) { this.capacity = capacity; } protected void setMachineMoney(double machineMoney) { this.machineMoney = machineMoney; } protected void setPrice(double price) { this.price = price; } public void setStuff(String[] stuff) { this.stuff = stuff; } public void setType(String type) { this.type = type; } /////////////////////////////////////////////////////////////////////////// public VendingMachine(int x, double p, String type) { this.type = type; stuff = new String [x]; Arrays.fill(stuff,this.type); price = p; }

/////////////////////////////////////////////////////////////////////// public int status() { int stuff_at = -1; for (int i = 0; i < stuff.length; i++) { if(stuff[i]!=null) { stuff_at = i; } } return stuff_at; }

/// The following methods are methods to help a machine transaction public String currencyIn(){ System.out.println("The price of a "+type+" is "+price+" USD"); String curr = "USD"; return curr; } public double getMoneyFromCustomer(){ Scanner s = new Scanner(System.in); System.out.println("Please enter your money"); double customerMoney = s.nextDouble(); return customerMoney; } public double getChange(double unitprice, double customerMoney){ double change = customerMoney; if(customerMoney

public void Vend() { String product = null; int at = this.status(); /////////////////////////////////////////////////////////////////////// if (at>=0) { double change = this.pay(); if (change >=0) { System.out.println("Your change is "+change); product = stuff[at]; stuff[at] = null; System.out.println(" Here is your one "+product); System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"); System.out.println("Have a great day!"); } } } }