@Test

    public void testMap2List() throws Exception{

        Map<String, String> map = new HashMap<String, String>();

        map.put("1", "AA");

        map.put("2", "BB");

        map.put("3", "CC");

        map.put("4", "DD");

        Collection<String> valueCollection = map.values();

        final int size = valueCollection.size();

        List<String> valueList = new ArrayList<String>(valueCollection);

        String[] valueArray = new String[size];

        map.values().toArray(valueArray);

    }