public void test_0() throws Exception { Map<String, Object> map = new LinkedHashMap<String, Object>(); JSONObject obj = new JSONObject(map); Assert.assertEquals(obj.size(), map.size()); map.put("a", 1); Assert.assertEquals(obj.size(), map.size()); Assert.assertEquals(obj.get("a"), map.get("a")); map.put("b", new int[] {1}); JSONArray array = obj.getJSONArray("b"); Assert.assertEquals(array.size(), 1); map.put("c", new JSONArray()); JSONArray array2 = obj.getJSONArray("b"); Assert.assertEquals(array2.size(), 1); Assert.assertEquals(obj.getByteValue("d"), 0); Assert.assertEquals(obj.getShortValue("d"), 0); Assert.assertEquals(obj.getFloatValue("d"), 0F); Assert.assertEquals(obj.getDoubleValue("d"), 0D); Assert.assertEquals(obj.getBigInteger("d"), null); Assert.assertEquals(obj.getSqlDate("d"), null); Assert.assertEquals(obj.getTimestamp("d"), null); JSONObject obj2 = (JSONObject) obj.clone(); Assert.assertEquals(obj.size(), obj2.size()); }