shoppingcart.java

BEA WebLogic Server 8.1大全 = BEA webLogic server 8.1 unleashed (美) Mark Artiges等著 袁毅 ... [等] 译 eng

package wls8unleashed.testing;

import java.io.Serializable;
import java.util.Vector;

public class ShoppingCart implements Serializable
{
    private Vector items;

    public ShoppingCart()
    {
	items = new Vector();
    }

    public void addItem(CartItem item)
    {
	items.add(item);
    }

    public Vector getItems()
    {
	return items;
    }

    public int getNumItems()
    {
	return items.size();
    }

    public void emptyCart()
    {
	items.clear();
    }

    public double getTotalCost()
    {
	double cost = 0.0;

	for (int i=0; i<items.size(); i++)
	{
	    CartItem item = (CartItem)items.get(i);
	    cost += item.getUnitPrice() * item.getQuantity();
	}

	return cost;
    }
}