Simple http test client

Client.java

import java.net.*;
import java.io.*;
 
/**
 * Connect to a url and send a HTTP HEAD request.
 *
 * Will print response info to stdout
 * 
 * Exceptions will be printed to stdout.
 * Examples:
 *   DNS lookup failure:
 *     java -cp target/client-0.1.0.jar Client http://www.example.comz/ 80
 *     Server: www.example.comz
 *     java.net.UnknownHostException: www.example.comz
 * 
 *   TCP connection failure/timeout (after 60s)
 *   java.net.SocketException: Network is unreachable (connect failed)
 *  
 */
public class Client {
 
    public static void main(String[] args) {
        if (args.length < 1) return;
 
        URL url;
        int port = Integer.parseInt(args[1]);
        
        try {
            url = new URL(args[0]);
        } catch (MalformedURLException ex) {
            ex.printStackTrace();
            return;
        }
 
        String hostname = url.getHost();
        System.out.println("Server: " + hostname);
 
        try (Socket socket = new Socket(hostname, port)) {
 
            OutputStream output = socket.getOutputStream();
            PrintWriter writer = new PrintWriter(output, true);
 
            writer.println("HEAD " + url.getPath() + " HTTP/1.1");
            writer.println("Host: " + hostname);
            writer.println("User-Agent: Simple Http Client");
            writer.println("Accept: text/html");
            writer.println("Accept-Language: en-US");
            writer.println("Connection: close");
            writer.println();
 
            InputStream input = socket.getInputStream();
 
            BufferedReader reader = new BufferedReader(new InputStreamReader(input));
 
            String line;
 
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }

 
        } catch (Exception ex) {
 
            System.out.println(ex);
        }
    }
}