list 去重並保持原來排序

public  <T> List<T> removeDuplicateKeepOrder(List<T> list){
   /* Set set = new HashSet();
    List<T> newList = new ArrayList<T>();
    for (T element : list) {
        if (set.add(element)) newList.add(element);
    }
    //list.clear();
    //list.addAll(newList);
    //return list;

　　return newList;*/

return  new ArrayList<T>(new LinkedHashSet<T>(list));

}