public class Main {
public static void main(String[] args) throws Exception {
final File f = new File("po.xml");
// A Ship to type
USAddress shipto = new USAddress("Alice Smith", "123 Maple Street",
"Mill Valley", "CA", 90952);
// A bill to type
USAddress billto = new USAddress("Robert Smith", "8 Oak Avenue",
"Old Town", "PA", 95819);
// A purchaseOrder
PurchaseOrderType po = new PurchaseOrderType();
po.billTo = billto;