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Can not retrieve data from the socket
package server;
import java.net.*;
import java.io.*;
import java.util.Vector;

import com.sun.org.apache.bcel.internal.generic.NEW;

public class Server {

public static void main(String[] args)throws IOException, InstantiationException,
IllegalAccessException {

    ServerSocket servsocket = null;
    Socket sock = null;
    byte[] bytebuffer = new byte[512];

    try {
        System.out.println("SERVER IS RUNNING...");
        servsocket = new ServerSocket(28000);
        while(true){
        sock = servsocket.accept();
        System.out.println(servsocket.isBound());
        System.out.println("Port "+servsocket+" Ready!!!");
        System.out.println("Accept connection requests from " + sock);
        System.out.println("From CLIENT "+sock.getInetAddress()+ " and PORT " +
            sock.getPort());
        ChatThread thread = new ChatThread(sock);
        System.out.println("Thread is running");
        thread.run();


        }
    } catch (IOException ioe) {
        System.out.println(ioe);
    }
    finally{
            try {
                servsocket.close();
                } catch (IOException ioe) {
                    System.out.println(ioe);
                }
            }
    }
    }

class ChatThread extends Thread{
    static Vector<ChatThread> chatthread = new Vector<ChatThread>(10);
    private Socket sock;
    private BufferedReader in ;
    private PrintWriter out;

    public ChatThread (Socket socket) throws IOException {
        this.sock = socket;
        in = new BufferedReader(
                new InputStreamReader(socket.getInputStream()));
        out = new PrintWriter(
                new OutputStreamWriter(socket.getOutputStream()));

        byte[] bytebuffer = new byte[512];
        int receivemssg;

    }

    public void run(){
        int recvMsgSize;
        byte[] bytebuffer = new byte[512];
        String readsocket;
        try {
            readsocket = in.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
            }
                }

public ChatThread (Socket socket) throws IOException {
        this.sock = socket;
        in  = sock.getInputStream();
        out = sock.getOutputStream();
        byte[] bytebuffer = new byte[512];
        int receivemssg;

    }

    public void run(){
        int recvMsgSize;
        byte[] bytebuffer = new byte[512];

        System.out.println("Thread is Running...");
        String masuk = new String(bytebuffer);

        System.out.println(bytebuffer);
        System.out.println(in.toString());
        System.out.println("thread successfully executed !!!");

        synchronized (chatthread) {
            chatthread.addElement(this);
        }

         try {
            while ((recvMsgSize = in.read(bytebuffer)) != -1) {
                    out.write(bytebuffer, 0, recvMsgSize);
                    System.out.println("The length of a character is received and returned "+bytebuffer.length);
                 }
        } catch (IOException e) {

            System.out.println(e);
        }
                    }
                    }