private void loadItems() {
    Item a = new Boat("skepp", "1000", "detta = skepp");
    reg.addItem(a);

    Item b = new Fish("fisk", "2000", "detta = fisk");
    reg.addItem(b);

    Item c = new SparePart("reservdel", "3000", "detta = reservdel");
    reg.addItem(c);
  }
  private void loadCustomers() {
    Customer a = new Customer("aaa", "900724-1111", "A-Gatan", "0702-AAA");
    reg.addCustomer(a);

    Order gg = new Order(a, "11111");
    a.addOrder(gg);
    reg.addOrder(gg);

    Customer b = new Customer("bbb", "900724-2222", "B-Gatan", "0702-BBB");
    reg.addCustomer(b);

    Customer c = new Customer("ccc", "900724-3333", "C-Gatan", "0702-CCC");
    reg.addCustomer(c);
  }