java ArrayList去重复值

    public static List removeDuplicateWithOrder(List list) {

        Set set = new HashSet();

        List newList = new ArrayList();

        for (Iterator iter = list.iterator(); iter.hasNext();) {

            Object element = iter.next();

            if (set.add(element)){

                newList.add(element);

            }

        }

        return newList;

    }

------

public static List removeDuplicateWithOrder(List list) {
Set set = new HashSet(list.size());
set.addAll(list);
List newList = new ArrayList(set.size());
newList.addAll(set);
return newList;
}

----

  public static List removeDuplicateWithOrder(List list) { 
        List newList = new ArrayList(); 
        for (Object o : list) { 
            if (!newList .contains(o)) newList.add(o); 
        } 
        return newList; 
    } 

java ArrayList去重复值

原文：http://www.cnblogs.com/yangpeng-jingjing/p/7491457.html