NetworkTest.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

public class NetworkTest {

    //Run as: java -Djava.net.preferIPv6Addresses=true NetworkTest
    public static void main(String[] args) {
        Long nanoTime = System.nanoTime();
//        String url = "https://www.google.com/";
        String url = "https://xtvapi.cloudtv.comcast.net/";
        System.out.println("java.net.preferIPv6Addresses = "+System.getProperty("java.net.preferIPv6Addresses"));
        System.out.println("java.net.preferIPv4Stack = "+System.getProperty("java.net.preferIPv4Stack"));
        try {
            System.out.println("Connecting to: "+url);
            HttpURLConnection urlc = (HttpURLConnection) new URL(url).openConnection();
            readStream(urlc.getInputStream());
            String result = "Completed. Status code: " + urlc.getResponseCode() + "\n";
            System.out.println(result);
            Map<String, List<String>> map = urlc.getHeaderFields();
            map.forEach((s, strings) -> System.out.println(s + "=" + strings));
            urlc.disconnect();
            printTime(nanoTime);
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("ERROR: " + e.getMessage() + "\n");
            printTime(nanoTime);
        }

    }

    private static void printTime(Long nanoTime) {
        nanoTime = (System.nanoTime() - nanoTime) / 1000000;
        System.out.println("\nElapsed time: "+nanoTime+" ms");
    }

    private static String readStream(InputStream in) throws IOException {
        String str = "";
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String line = br.readLine();
        while (line != null) {
            str += line + "\n";
            line = br.readLine();
        }
        return str;
    }
}