Using the AutoCompleteTextField component

            final AutoCompleteTextField field = new AutoCompleteTextField("searchField", mySearchModel) {
                @Override
                protected Iterator<String> getChoices(String input) {
                    if (Strings.isEmpty(input)) {
                        List<String> emptyList = Collections.emptyList();
                        return emptyList.iterator();
                    }
 
                    List<String> keyMatches = new ArrayList<String>(10);
 
                    return myService.searchMatches(keyMatches).iterator();
                }
            };