Using Jackson's JSON Parser: Complex JSON?

I have complex JSON that I am trying to parse with Jackson JSON. I am a bit confused on how to get into the latLng object in order to pull out the lat, lng values. This is part of JSON:

{
    "results": [
        {
            "locations": [
                {
                    "latLng": {
                        "lng": -76.85165,
                        "lat": 39.25108
                    },
                    "adminArea4": "Howard County",
                    "adminArea5Type": "City",
                    "adminArea4Type": "County",

This is what I have so far used in Java to pull it out:

public class parkJSON
{
    public latLng _latLng;

    public static class latLng
    {
        private String _lat, _lng;
        public String getLat() { return _lat; }
        public String getLon() { return _lng; }
    } 
}

and

ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally
mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
parkJSON geo = mapper.readValue(parse, parkJSON.class);

System.out.println(mapper.writeValueAsString(geo));  
String lat = geo._latLng.getLat();
String lon = geo._latLng.getLon();
output = lat + "," + lon;
System.out.println("Found Coordinates: " + output);

RESOLVED This is how I solved the problem using the Tree Model for future reference:

            ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally
            mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);                 
            JsonNode rootNode = mapper.readTree(parse);
            JsonNode firstResult = rootNode.get("results").get(0);
            JsonNode location = firstResult.get("locations").get(0);
            JsonNode latLng = location.get("latLng");
            String lat = latLng.get("lat").asText();
            String lng = latLng.get("lng").asText();
            output = lat + "," + lng;
            System.out.println("Found Coordinates: " + output);