Thread: need help with Vending Machine code...

well, I've made a few modification, but still, missing somethings

public class VendingMachine {
    String product = ""; 
    double price = 0.0;
    int qty = 0;
    //constructing vending machine that takes product, price and qty
    public VendingMachine(String product, double price, int qty)
    {
        this.product = product;
        this.price = price;
        this.qty = qty;
    }
 
    //getters
    public String getProduct()
    {
        return product;
    }
    public double getPrice()
    {
        return price;
    }
    public int getQty()
    {
        return qty;
    }
    @Override
    public String toString()
    {
        return product+" @"+price;
    }
 
}

import java.util.*;
public class VendingMachineSimulation {
    public static void main(String [] args)
    {
        ArrayList<VendingMachine> vMachine = new ArrayList<VendingMachine>();
        Scanner myscan = new Scanner(System.in);
        vMachine.add(new VendingMachine("Pepsi Cola", 1.00, 10));
        String key = "";
        do
        {
            System.out.println("SELECT FROM MENU!");
        System.out.println("S)how product I)nsert coin B)uy A)dd product R)emove coins Q)uit");
        key = myscan.next().toUpperCase();
 
 
            if (key.equals("S"))
            {
                for (int i = 0; i < vMachine.size(); i++)
                        {
                            System.out.println(vMachine.get(i));
                        }break;
            }
            else if(key.equals("I"))
            {
                //implement Insert coins
            }
            else if(key.equals("B"))
            {
                //implement add product
            }
            else if(key.equals("A"))
            {
                //implement add product
                System.out.println("Description:");
                String description = myscan.next();
                System.out.println("Price:");
                double price = myscan.nextDouble();
                System.out.println("Quantity:");
                int qty = myscan.nextInt();
                vMachine.add(new VendingMachine(description, price, qty));
            }
            else if(key.equals("R"))
            {
                //implement remove product
            }
            else break;
       }while(!(key.equals("Q")));
    }
}

About the switch case, you can use chars, for example:

 key = myscan.next().toUpperCase();
			char c = key.charAt(0);
			switch (c) {
			case 'S':
				System.out.println("show");
				break;
			case 'I':
				System.out.println("insert");
				break;
			case 'B':
				System.out.println("buy");
				break;
			default:
				break;
			}

Or you can use an enumeration (you need some "wrapper") like this:

key = myscan.next().toUpperCase();
			Wrapper w = Wrapper.valueOf(key);
			switch (w.ordinal()) {
			case 0:
				System.out.println("show");
				break;
			case 1:
				System.out.println("insert");
				break;
			case 2:
				System.out.println("buy");
				break;
			default:
				break;
			}
                       .................
                       private enum Wrapper {
		           S, I, B, A, R;
	               }

What else do you need? Not hesitate to ask