1 import java.util.ArrayList;
 2 
 3 
 4 public class EmailClient {
 5     /**
 6      * Example usage of Emailer functionality
 7      *
 8      * @param args Description
 9      */
10     public static void main(String[] args) throws Exception {
11         Emailer emailer = new Emailer();
12 
13         ArrayList lineItems = new ArrayList();
14         lineItems.add(new Item("Thinking in Java", 24.05f));
15         lineItems.add(new Item("Core Java Volume I", 34.30f));
16 
17         Customer customer = new Customer("John", "Brown", "jb@gmail.com");
18 
19         emailer.sendReceipt(new Order(customer, lineItems));
20     }
21 }
22