Problem of Client and Server interaction over TCP

There is a Server with many connections, and the Client , which should simply correspond with each other.

Everything comes to the Server , but not to the Client . What is the problem?

Class implementing Server :

public class ServerChat { public static Thread StartServerT = new Thread(new StartServer()); public static Thread ServerSOutT = new Thread(new ServerSOut()); public static Thread ExitT = new Thread(new Exit()); public static LinkedList<DataInputStream> LLin = new LinkedList<DataInputStream>(); public static LinkedList<DataOutputStream> LLout = new LinkedList<DataOutputStream>(); public static LinkedList<Socket> LLS = new LinkedList<Socket>(); public static ServerSocket ss; public static boolean check = true; public static boolean ChekIn = false; public static int port = 6666; public static int num = 0; public static int in = 0; public static String line = null; public static void main(String[] args) { try { System.out.println("Server start work"); ss = new ServerSocket(port); StartServerT.setPriority(6); StartServerT.start(); ExitT.setPriority(8); ExitT.start(); } catch (IOException e) { System.out.println("Server not run"); } } public static class StartServer implements Runnable { @Override public void run() { try { System.out.println("Client connect run"); while (true) { // ждем подключения от клиентов Socket socket = ss.accept(); LLS.add(socket); if (socket.isConnected()) { // Для каждого клиента создаём DataInputStream и DataOutputStream OutWriteSocket(); System.out.println("Client connect " + socket.getInetAddress()); } } } catch (IOException e) { System.out.println("StartServer error"); } } public void OutWriteSocket() { try { InputStream inIS = (LLS.get(num)).getInputStream(); OutputStream outIS = (LLS.get(num)).getOutputStream(); DataInputStream ind = new DataInputStream(inIS); DataOutputStream outd = new DataOutputStream(outIS); LLin.add(ind); // Записываем всё в LinkedList LLout.add(outd); num = num + 1; System.out.println("Number of client " + in); in = in + 1; // Новый клиентский Thread для для приёма данных Thread ServerSInT = new Thread(new ServerSIn()); ServerSInT.start(); // Запускаем его if ( ! ServerSOutT.isAlive()) { ServerSOutT.start(); // Запускаем Thread для вывода } } catch (IOException e) { System.out.println("OutWriteSocket error"); } } } public static class ServerSIn implements Runnable { // Thread ввода @Override public void run() { try { System.out.println("ServerSIn run"); int w = in - 1; while (true) { line = LLin.get(w).readUTF(); // Принимаем данные // При значении ChekIn == true Thread вывода начинает // проверять значение line и отправлять его ChekIn = true; System.out.println(line); } } catch (IOException e) { System.out.println("ServerSIn error"); } } } public static class ServerSOut implements Runnable { @Override public void run() { try { System.out.println("ServerSOut run"); while (true) { if (ChekIn) { System.out.println(line); for (int i = 0; i < LLout.size(); i++) { System.out.println(line); LLout.get(i).writeUTF(line); // LLout.get(i).flush(); } } } } catch (IOException e) { System.out.println("ServerSOut error"); } } } private static class Exit implements Runnable { @Override public void run() { try { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); System.out.println("If you want off server write - 'exit'"); while (check) { String line = reader.readLine(); if (line.equals("exit")) { StartServerT.stop(); ServerSOutT.stop(); System.out.println("Server Stop"); check = false; } } } catch (IOException e) { System.out.println("You dont maik off server"); } } } } 

Class implementing Client :

 public class ClientChat { public static Thread t1 = new Thread(new ConectToServer()); public static Thread InServerT = new Thread(new InServer()); public static DataInputStream in; public static String line = null; public static boolean CheckOut = false; public static void main(String[] args) throws IOException { t1.start(); } public static class ConectToServer implements Runnable { public static int serverPort = 6666; public void run() { try { System.out.println("Connect to server..."); ConectToServerURL(); } catch (IOException e) { System.out.println("No connect to server tray again"); } } public void ConectToServerURL() throws IOException { try { String address = "127.0.0.1"; System.out.println("You connect to server"); System.out.println("If you wont exit write 'exit' "); InetAddress ipAddress = InetAddress.getByName(address); Socket socket = new Socket(ipAddress, serverPort); InputStream sin = socket.getInputStream(); OutputStream sout = socket.getOutputStream(); in = new DataInputStream(sin); DataOutputStream out = new DataOutputStream(sout); InServerT.start(); BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); while (true) { line = keyboard.readLine(); if (line.equals("exit")) { System.out.println("You exit"); t1.stop(); } out.writeUTF(line); out.flush(); CheckOut = true; } } catch (Exception x) { System.out.println("Client not maik connect to server"); } } } public static class InServer implements Runnable { @Override public void run() { try { while (true) { if (CheckOut) { line = in.readUTF(); System.out.println(line); } } } catch (IOException e) { System.out.println("InServer error"); } } } }