Gson gson = new Gson(); String jsonString = gson.toJson(obj); MyClass obj = gson.fromJson(jsonString, MyClass.class); ObjectMapper objectMapper = new ObjectMapper(); String jsonString = objectMapper.writeValueAsString(obj); MyClass obj = objectMapper.readValue(jsonString, MyClass.class); JSONObject jsonObject = new JSONObject(); jsonObject.put("key", "value"); String jsonString = jsonObject.toJSONString(); JSONObject newJsonObject = (JSONObject) JSONValue.parse(jsonString); Jsonb jsonb = JsonbBuilder.create(); String jsonString = jsonb.toJson(obj); MyClass obj = jsonb.fromJson(jsonString, MyClass.class);


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