sales.java

ssd3部分quiz、exercise、exam的参考答案

import java.util.*;

public class Sales {
	
	ArrayList<Order> orders;
	
	public Sales() {
		orders = new ArrayList<Order>();
	}
	
	public void addOrder(Order order) {
		orders.add(order);
	}
	
	public Iterator<Order> iterator() {
		return orders.iterator();
	}
	
	public int getNumberOfOrders() {
		return orders.size();
	}
	
}