package developerworks.ajax.store;import java.util.*;public class Catalog {  private static Map<String,Item> items;  static {   items = new HashMap<String,Item>();    items.put("hat001",new Item("hat001","Hat","Stylish bowler hat (SALE!)",1999));   items.put("dog001",new Item("dog001","Dog","Chocolate labrador puppy",7999));   items.put("sou001",new Item("sou001","Soup","Can of tasty tomato soup",199));   items.put("cha001",new Item("cha001","Chair","Swivelling office chair", 4999));   items.put("str001",new Item("str001","String","Metric tonne of bailing twine", 1999));   items.put("qua001",new Item("qua001","Quark","Everyone's favorite sub-atomic particle", 49));  }  public Collection<Item> getAllItems() {    return items.values();  }  public boolean containsItem(String itemCode) {    return items.containsKey(itemCode);  }  public Item getItem(String itemCode) {    return items.get(itemCode);  }}