VK json example

gistfile1.txt

import java.io.InputStreamReader;
import java.net.*;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

public class vkJson {
	static JSONParser jsonParser = new JSONParser();
	
	public static void main(final String[] args) throws Exception {
		Proxy proxy = new Proxy(Proxy.Type.HTTP,
				new InetSocketAddress("192.168.0.2", 3128)
				);
//		URL url = new URL("http://school.ioffe.ru/");
		URL url = new URL("https://api.vk.com/method/users.get?" +
				"lang=en&user_ids=7373");
		HttpURLConnection connection = (HttpURLConnection)
				url.openConnection(proxy);
//		BufferedReader br = new BufferedReader(
//				new InputStreamReader(
//						connection.getInputStream()/*, "KOI8-R"*/));
//		String s;
//		while ((s = br.readLine()) != null) {
//			System.out.println(s);
//		}
//		br.close();
		
		Object response = jsonParser.parse(new InputStreamReader(
				connection.getInputStream()));
		if (response instanceof Long) {
			System.out.println(((Long) response) * 17);
		}
		JSONObject responseObject = (JSONObject) response;
		if (responseObject.containsKey("error")) {
			System.out.println(((JSONObject) responseObject.get("error")).get("error_msg"));
			return;
		}
		JSONArray array = (JSONArray) responseObject.get("response");
		if (array.isEmpty()) {
			System.out.println("Invalid user id");
			return;
		}
		System.out.println(((JSONObject) array.get(0)).get("last_name"));
	}
}