Question

Money Lab using arraylists in Java

Using the Coin class below create a program with the following requirements

• Create an arraylist that holds the money you have in your wallet.

• You will add a variety of coins(coin class) and bills (ones, fives, tens *also using the coin class) to your wallet arraylist.

• Program must include a loop that asks you to purchase items using the coins in your wallet.

  • When purchasing items, the program will remove coins from the arraylist and then add new coins based on the change that you receive until you are done buying or out of money.

• Finally the program should total the amount of money that you have left

• Please include methods as appropriate

Coin Object

public class Coin

{

   private int side;

   private double value;

   private String name;

    public Coin()

   {

       side = 1;

       value = 0.25;

       name = "Quarter";

   }

   public Coin(String iname, double ivalue)

   {

       name = iname;

       value = ivalue;

   }

   public String getName()

   {

       return name;

   }

   public double getValue()

   {

       return value;

   }

   public void setName(String iname)

   {

       name = iname;

   }

   

   public void setValue(double ivalue)

   {

       value = ivalue;

}

}

Answer 1

File: MoneyLab.java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class MoneyLab
{

private List<Coin> Wallet;
public MoneyLab()
{
Wallet = new ArrayList<>();
}

double getTotalWalletValue()
{
double value = 0;
for (int i = 0; i < Wallet.size(); i++)
{
value += Wallet.get(i).getValue();
}
return value;
}

void LoadMoneyInWallet()
{
Scanner scanner = new Scanner(System.in);
System.out.println("Enter coin name you want to add: ");
String name = scanner.nextLine();
System.out.println("Enter coin value you just added: ");
double value = scanner.nextDouble();
Coin c = new Coin(name, value);
Wallet.add(c);
}

void MakePurchaseComplete(double value)
{
// total amount is sufficient!!
double wallet_value = 0;
int i = 0;
for ( ; i < Wallet.size(); i++)
{
wallet_value += Wallet.get(i).getValue();
if (wallet_value > value)
break;
}
for (int j = 0; j < i+1; j++)
Wallet.remove(0);
// Create a new coin with left over value:
double coin_value = wallet_value - value;
Coin c = new Coin("custom-coin", coin_value);
Wallet.add(c);
}

void PurchaseItem()
{
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the cost of item you want to purchase: ");
double value = scanner.nextDouble();
// make sure the total money is sufficient to buy the item
double total = getTotalWalletValue();
if (value > total)
{
System.out.println("Cannot continue with the purchase, you don't have sufficient balance");
return;
}
MakePurchaseComplete(value);
}

public static void main(String[] args)
{
int input = 1;
MoneyLab wallet = new MoneyLab();
Scanner scanner = new Scanner(System.in);
while (input > 0)
{
System.out.println("Please enter the operation to the wallet :\n1.) Loading the wallet \n2.) Purchase an item.\n0.) Keep the wallet back in the pocket!");
input = scanner.nextInt();
if (input > 2 || input < 0)
System.out.println("Invalid input. Please try again\n");
if (input == 1)
wallet.LoadMoneyInWallet();
if (input == 2)
wallet.PurchaseItem();
}
System.out.println("Thank you. Have a nice day. Net amount in your wallet is " + wallet.getTotalWalletValue());
}

}

File: Coin.java

public class Coin
{
private double value;
private String name;

public Coin(String iname, double ivalue)
{
name = iname;
value = ivalue;
}

public String getName()
{
return name;
}

public double getValue()
{
return value;
}

public void setName(String iname)
{
name = iname;
}

public void setValue(double ivalue)
{
value = ivalue;
}

}