how to parse a JSON string into JsonNode in Jackson?

Programmer Question

it should be so simple, but I just cannot find it after being trying for an hour #embarrasing

I need to get a JSON string e.g. {"k1":v1,"k2":v2} parsed as a JsonNode

  JsonFactory factory = new JsonFactory();

  JsonParser jp = factory.createJsonParser("{\"k1\":\"v1\"}");

  JsonNode actualObj = jp.readValueAsTree();

gives java.lang.IllegalStateException: No ObjectCodec defined for the parser, can not deserialize JSON into JsonNode tree

Find the answer here