HELP!! public class Warehouse

$\{$

$/**$

$*$ storage is managed as one big stack, where items are laid on top of each other

$*/$

private ArrayList storage $=$ new ArrayList$()$;

public int getNumberOfItemsInStock$()$

$\{$

work on: return the number of items in storage

return $-1$;

$\}$

$/**$

$*$ Modify to add item to the collection and make the tests pass.

$*$

$*$ @param item the item to store in the Warehouse

$*/$

public void receive$($Item item$)$

$\{$

work on: store item at at the front of the list

$\}$

$/**$

$*$ modify to remove an item from the collection and make the tests pass

$*$ @return the item that was retrieved from storage

$*$ @throws OutOfStockException if there are no items to ship

$*/$

public Item ship$()$ throws OutOfStockException

$\{$

work on: return the last item in the list

$\}$

$\}$public class Producer extends Thread

$\{$

private String name;

private Warehouse warehouse;

private int numberOfItemsToProduce;

public Producer$($String givenName, Warehouse givenWarehouse, int givenNumberOfItemsToProduce$)$

$\{$

name $=$ givenName;

warehouse $=$ givenWarehouse;

numberOfItemsToProduce $=$ givenNumberOfItemsToProduce;

$\}$

@Override

public void run$()$

$\{$

System.out.println$($name $+"$ running in Thread: $"+$ Thread.currentThread$().$getName$())$;

$//$work on: produce numberOfItemsToProduce new items

System.out.println$($name $+"$ ended."$)$;

$\}$

$\}$