public static void main(String[] args) {

        Test07 test07 = new Test07();

        System.out.println(test07.getList());

    }

    public List getList() {

        List originalList = new ArrayList();

        originalList.add(1);

        originalList.add(3);

        originalList.add(3);

        originalList.add(5);

        originalList.add(7);

        originalList.add(7);

        originalList.add(13);

        List tempList = new ArrayList();

        for (Object object : originalList) {

            if (!tempList.contains(object)) {

                tempList.add(object);

            }

        }

        return tempList;

    }

　　　　　// 利用set集合唯一性去重

        Set set = new HashSet(originalList);

        List tempList = new ArrayList(set);

        return tempList;

　　　　 TreeSet treeSet = new TreeSet(originalList);

        List tempList = new ArrayList();

        tempList.addAll(treeSet);

        return tempList;