New to Java

I am trying to create a small program for class that allows the user to enter and store inventory items. I am supposed to update it now to store and display multiple items and add a subclass, but I can not get the first part to compile yet. On this part im getting an error message -
cannot find symbol
symbol : class Item
location : class WorkInventory

I am not understanding much of this java programming and am looking for any help I can find in getting a grasp of it.

The code for my program is as follows,

//WorkInventory.java
//Java Inventory Work Products

public class WorkInventory
{
   // main methods begins execution of java application
   public static void main( String args[])
   {
         Item myProduct = new Item();
 
         System.out.println("\n\nItem Name: "+myProduct.getItemName()); //display item name
                 System.out.println("Item Number: "+myProduct.getItemNumber()); //display item number
                 System.out.println("Quantity in Stock:"+myProduct.getStockQuantity()); //display quantity in stock
                 System.out.println("Item Price:$ "+myProduct.getItemPrice()); //display item price
                 System.out.println("Value of Inventory:$ "+myProduct.calculateInventoryValue()); //display total value of inventory for this item
 
         System.out.println("\n\nEnter item name or enter the word stop to quit:");//prompt
              //   myProduct.setItemName(input.next()); // read item name or stop
 
 
   } // end main method
}//end class WorkInventory

if anyone can offer me any advice it would be greatly appreciated