Java中 map.values转换为list或者string[]

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@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); }