My java chat doesn't show more characters (�,�,�,�,�),any help?

Question

Hello!I'm studing two java source:
//Importo i package necessari
import java.net.*;
import java.io.*;
public class TCPClient {
public void start()throws IOException {
//Connessione della Socket con il Server
Socket socket = new Socket("localhost", 7777);
//Stream di byte da passare al Socket
DataOutputStream os = new DataOutputStream(socket.getOutputStream());
DataInputStream is = new DataInputStream(socket.getInputStream());
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Per disconnettersi dal Server scrivere: QUIT\n");
//Ciclo infinito per inserimento testo del Client
while (true) {
System.out.print("Inserisci: ");
String userInput = stdIn.readLine();
if (userInput.equals("QUIT"))
break;
os.writeBytes(userInput + '\n');
System.out.println("Hai digitato: " + is.readLine());
//Chiusura dello Stream e del Socket
os.close();
is.close();
socket.close();
public static void main (String[] args) throws Exception {
TCPClient tcpClient = new TCPClient();
tcpClient.start();
//end
and
//Importo i package
import java.net.*;
import java.io.*;
//Creazione di una classe per il Multrithreading
class ServerThread extends Thread {
private Socket socket;
public ServerThread (Socket socket) {
this.socket = socket;
//esecuzione del Thread sul Socket
public void run() {
try {
DataInputStream is = new DataInputStream(socket.getInputStream());
DataOutputStream os = new DataOutputStream(socket.getOutputStream());
while(true) {
String userInput = is.readLine();
if (userInput == null || userInput.equals("QUIT"))
break;
os.writeBytes(userInput + '\n');
System.out.println("Il Client ha scritto: " + userInput);
os.close();
is.close();
System.out.println("Ho ricevuto una chiamata di chiusura da:\n"
               + socket + "\n");
socket.close();
catch (IOException e) {
System.out.println("IOException: " + e);
//Classe Server per attivare la Socket
public class TCPParallelServer {
public void start() throws Exception {
ServerSocket serverSocket = new ServerSocket(7777);
//Ciclo infinito di ascolto dei Client
while(true) {
System.out.println("In attesa di chiamate dai Client... ");
Socket socket = serverSocket.accept();
System.out.println("Ho ricevuto una chiamata di apertura da:\n" + socket);
ServerThread serverThread = new ServerThread(socket);
serverThread.start();
public static void main (String[] args) throws Exception {
TCPParallelServer tcpServer = new TCPParallelServer();
tcpServer.start();
but this client/server program doesn't display more characters such ��� ect ect,how i do to mode this code for a correct output?
Greetings

Answer 1

ok,i'm trying but now to test my source i've to find
the readChar in BufferedWriter,i've see that in
BufferedWriter readChar is read() but this don't
work,the editor gives me an error that says"found int
required char" possible loss of precision.I can't
read the javadocs corretly,i'm a newbie.
I assume that you mean BufferedReader and that your use of BufferedWriter is a typo.
From your first post I assumed you were reading and writing lines not the individual characters but no problem. Yes, one should use the read() method to read an individual character and if the value returned is not -1 (which signifies end of file) then it can be cast to a char using
char ch = (char)br.read();