Collection of Items

Question

Hi virtual colleagues! Could anyone please ans. my comments in the code.
Thanks for any help! : )
//This is TEST DRIVER for VendingMachine Class.
public class VmTrial
public static void main(String []args)
  VendingMachine vm = new VendingMachine();
  String in = new String();
  IO.println("Enter items to add into vending machine:");
  in = IO.readLine();
  int pin = IO.readInt();
  int q = IO.readInt();
  vm.addItemType(new ItemType(in,pin,q)); // keeps on adding items into ARRAYLIST of Vending
//machine class
  } while(in != null)
// but this loop is not working!!
// I am only able to add ONE item! How can I keep on adding items continuously into ArrayList?
//Method in VendingMachine class
public void addItemType(ItemType item)
     ItemType aitem = item;
     list.add(aitem);
    } //END of addItemType()
private ArrayList list = new ArrayList();

Answer 1

You should try this:
//This is TEST DRIVER for VendingMachine Class.
public class VmTrial
  public static void main(String []args)
    VendingMachine vm = new VendingMachine();
    String in;
    while (true)
      IO.println("Enter items to add into vending machine:");
      in = IO.readLine();
      if ((in == null)) || (in.length() == 0))
        break;
      int pin = IO.readInt();
      int q = IO.readInt();
      vm.addItemType(new ItemType(in, pin, q)); // keeps on adding items into ARRAYLIST of Vending machine class