Socket, BufferedReader i jego readLine()

Problem częsty w sumie, choć jakąś nie potrafię znaleźć rozwiązania. readLine() blokuje program.

import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class Klasa 
{
	public static String strona;
	public static String sciezkaPlikuDoZapisania;
	private Socket socket;
	private PrintWriter pw;
	private BufferedReader br;
	private InputStream is;
	private OutputStream os;
	public Klasa()
	{
		strona = "www.google.pl";
		sciezkaPlikuDoZapisania = "strona.html";
	}
	
	public Klasa(String s1, String s2)
	{
		strona = s1;
		sciezkaPlikuDoZapisania = s2;
	}
	
	public void wyslijZadanie() throws IOException
	{
		os = socket.getOutputStream();
		pw = new PrintWriter(new OutputStreamWriter(os, "UTF-8"));
		pw.println("GET / HTTP/1.1");
		pw.println("Host: " + strona);
		pw.println("Connection: close");
		pw.println("");
		pw.flush();
		pw.flush();
	}
	
	public String pobierzStrone() throws IOException
	{
		StringBuilder ret = new StringBuilder();
		is = socket.getInputStream();
		br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
		String line;
		System.out.println("Wypis");
		while(!(line = br.readLine()).isEmpty())
			System.out.println(line);
		System.out.println("Naglowek przeczytany");
		while((line = br.readLine()) != null)
			ret.append(line);
		System.out.println("Wypisuje");
		return ret.toString();
	}
	
	public void zapiszDoPliku(String s) throws IOException
	{
		FileWriter fw = new FileWriter(sciezkaPlikuDoZapisania);
		fw.write(s);
		fw.close();
	}
	
	public void utworzSocket() throws IOException
	{
		InetAddress ia = InetAddress.getByName(strona);
		socket = new Socket(ia, 80);
	}
	
	public void zamknijSocket() throws IOException
	{
		is.close();
		os.close();
		pw.close();
		br.close();
		socket.close();
	}
	
	public static void main(String args[]) throws UnknownHostException, IOException
	{
		Klasa k = null;
		if(args.length == 2)
			k = new Klasa(args[0], args[1]);
		else
			k = new Klasa();
		k.utworzSocket();
		String t = k.pobierzStrone();
		k.zapiszDoPliku(t);
		k.zamknijSocket();
	}
}

Dla mnie dziwny jest fakt, że to poniżej działa poprawnie:

import java.io.BufferedReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class Yyy 
{
	public static String strona = "www.google.pl";
	public static String sciezkaPlikuDoZapisania = "strona.html";
	

	public static void main(String args[]) throws UnknownHostException, IOException
	{
		if(args.length == 2)
		{
			strona = args[0];
			sciezkaPlikuDoZapisania = args[1];
		}
		InetAddress ia = InetAddress.getByName(strona);
		@SuppressWarnings("resource")
		Socket s = new Socket(ia, 80);
		InputStream is = s.getInputStream();
		OutputStream os = s.getOutputStream();
		
		PrintWriter pw = new PrintWriter(new OutputStreamWriter(os, "UTF-8"));
		
		pw.println("GET / HTTP/1.1");
		pw.println("Host: " + strona);
		pw.println("Connection: close");
		pw.println("");
		pw.flush();
		BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
		String line = br.readLine();
		StringBuilder sb = new StringBuilder();
		while(!line.isEmpty())
		{
			line = br.readLine();
		}
		while((line = br.readLine()) != null)
			sb.append(line);
		
		String ret = sb.toString();
		FileWriter fw = new FileWriter(sciezkaPlikuDoZapisania);
		fw.write(ret);
		fw.close();
	}
}

Siedzę nad tym już trochę, trochę czytałem o tym, jednak po kilku próbach się poddałem i piszę tutaj. W jaki sposób odczytać odpowiedź w pierwszym kodzie, by to działało poprawnie?

Ja zamiast PrintWritera użyłbym tego do wysłania:

DataOutputStream out = new DataOutputStream(socket.getOutputStream());
out.writeUTF("Tekst");

I tego do odczytu:

DataInputStream in = new DataInputStream(socket.getInputStream());
String s = in.readUTF();