Signing the URL and parsing the JSON are the challenges to the programmer using google for the first time.

JsonGeoService.java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

public class JsonGeoService {
    JsonParser p = new JsonParser();
    String results;
    Double[] latLng = new Double[2];
    String county;

    private final static Logger LOGGER = LogManager.getLogger(JsonGeoService.class.getName());

    static final String key = "get this from google";
    static final String id = "get this from google";
    
    URL getGeoDataURL(String address) throws Exception {
        String apiUrl = "https://maps.googleapis.com/"
                      + "maps/api/geocode/json"
                      + "?address=" 
                      + URLEncoder.encode(address, "UTF-8")
                      + "&client=" + id;
   
    	UrlSigner signer = new UrlSigner(key);
        URL url = new URL(apiUrl);
        String request = signer.signRequest(url.getPath(),url.getQuery());
        url = new URL(apiUrl + request);
        return url;
    }
    public String connectWithURL(URL url) throws Exception {
        int timeout = 0;
        HttpURLConnection http = null;
        http = (HttpURLConnection) url.openConnection();
        http.setRequestMethod("GET");
        http.setRequestProperty("Content-length", "0");
        http.setUseCaches(false);
        http.setAllowUserInteraction(false);
        http.setConnectTimeout(timeout);
        http.setReadTimeout(timeout);
        http.connect();
        int status = http.getResponseCode();
        LOGGER.debug("http response code = " + status);
        switch (status) {
            case 200:
            case 201:
                BufferedReader br = new BufferedReader(
                    new InputStreamReader(http.getInputStream()));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line+"\n");
                }
                br.close();
                return sb.toString();
            }
        return null;
    }    
    void setCounty() throws Exception {
        String countyKey = "administrative_area_level_2"; 
        JsonElement x = p.parse(results);
        JsonArray y = x.getAsJsonObject().get("results").getAsJsonArray();
        JsonObject z = y.get(0).getAsJsonObject();
        JsonArray alpha = z.get("address_components").getAsJsonArray();
        for (final JsonElement comp : alpha) {
            JsonObject compo = (JsonObject)comp;
            JsonArray types = compo.get("types").getAsJsonArray();
            for(final JsonElement type : types) {
                if (type.getAsString().equals(countyKey)) {
                    this.county = compo.get("long_name").getAsString();
                }
            }
        }
    }
    void setLatLng() {
        JsonElement pResults = p.parse(results);
        JsonArray resultsArray = pResults.getAsJsonObject()
            .get("results")
            .getAsJsonArray();
        JsonObject location = resultsArray.get(0).getAsJsonObject()
            .get("geometry").getAsJsonObject()
            .get("location").getAsJsonObject();
        latLng[0] = location.get("lat").getAsDouble();
        latLng[1] = location.get("lng").getAsDouble();
    }
    public void setLatLngAndCountyForAddress(String address) throws Exception {
        URL url = getGeoDataURL(address);
        results = connectWithURL(url);
        setCounty();
        setLatLng();
    }
    public String toString() {
        return "lat/lng=" + latLng[0] + "/" + latLng[1] + " and county=" + county;
    }
    public static void main(String[] args) throws Exception { 
        JsonGeoService geo = new JsonGeoService();
        geo.setLatLngAndCountyForAddress("123 Main Street, Frisco, TX");
        System.out.println(geo);
    }
}