sales.java

ssd3 exercise4正确的

import java.util.*;
import java.text.*;

public class Sales 
{

	
	private Vector  orders;

	public Sales()  
	{

		orders = new Vector();
	}

	
	public void addOrder(Order order)  
	{

		orders.add(order);
	}

	
	public Iterator getOrdersIterator() 
	{

		return orders.iterator();
	}


	public int getNumberOfOrders() 
	{

		return orders.size();
	}
}