去掉ArrayList里面的重复元素

public static List removeListSameObject(List list)...{
        Set someSet = new HashSet(list);
        Iterator iterator = someSet.iterator();   
        List relist = new ArrayList();   
        int i = 0;   
        while(iterator.hasNext())...{   
            relist.add(iterator.next().toString());   
            i++;   
        }   
        return relist;   
}