public class ItemService { private Map<String, ItemDetail> items = DatabaseClass.getItems(); public Map<String, ItemDetail> getItems() { return items; } public ItemService() { items.put( "First", new ItemDetail( 1L, "Air Jordan's", "Air Jordan 1", "Jordan", "Basketball shoes", "Black/Red", 5.0, 2, "Male", "9")); items.put( "Second", new ItemDetail( 2L, "Nike Elite shoes", "Kobe 1", "Nike", "Basketball shoes", "White/Yellow", 4.9, 5, "Male", "10")); } public List<ItemDetail> getAllItems() { return new ArrayList<ItemDetail>(items.values()); } }