* updates the item names, weight, and amounts
*/
public void update(){
int inventoryLength = World.getWagon().getInventory().getLength();
Inventory inv = World.getWagon().getInventory();
int amount, weight;
String name;
for(int i=0; i<inventoryLength; i++)
{
amount = inv.getItem(i).getNumber();
weight = inv.getItem(i).getWeight();
name = inv.getItem(i).getName();
lblItemsname[i].setText(name);
lblItemswt[i].setText(""+weight*amount);
lblItemsamt[i].setText(""+amount);
if(amount != 0)