Help me to sort out the problem in this Simple Client - Server problem

Question

Hi all,
I have just started Network programming in java . I tried to write simple Client and Server program which follows
MyServer :
package connection;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
public class MyServer {
      * @param args
     public static void main(String[] args) {
          String ss ="";
          try {
               ServerSocket sockServer = new ServerSocket(6000);
               Socket clientLink = sockServer.accept();
               System.out.println("Connection Established");
               InputStreamReader isr = new InputStreamReader(clientLink.getInputStream());
               BufferedReader bufReader = new BufferedReader(isr);
               System.out.println("buf "+bufReader.readLine());
               try {
                    while ((ss=bufReader.readLine())!=null) {
                         ss+=ss;
                    System.out.println("client message "+ss);
               } catch (IOException e) {
                    System.out.println("while reading");
                    e.printStackTrace();
          } catch (IOException e) {
               System.out.println("Can't able to connect");
               e.printStackTrace();
}MyClient:
package connection;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
public class MyClient {
      * @param args
     public static void main(String[] args) {
          try {
               Socket client = new Socket("127.0.0.1",6000);
               OutputStreamWriter osw = new OutputStreamWriter(client.getOutputStream());
               PrintWriter pw = new PrintWriter(osw);
               pw.write("hello");
          } catch (IOException e) {
               System.out.println("Failed to connect");
               e.printStackTrace();
}I got this error message when I start my client program .
Error message :
Connection Established
java.net.SocketException: Connection reset
     at java.net.SocketInputStream.read(Unknown Source)
     at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
     at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
     at sun.nio.cs.StreamDecoder.read(Unknown Source)
     at java.io.InputStreamReader.read(Unknown Source)
Can't able to connect
     at java.io.BufferedReader.fill(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at connection.MyServer.main(MyServer.java:27)I think this is very simple one but can't able to find this even after many times . please help me to sort out this to get start my network programming .
Thanks in advance.

Answer 1

               System.out.println("buf "+bufReader.readLine());Here you are reading a line from the client and printing it.
               try {
                    while ((ss=bufReader.readLine())!=null) {
                         ss+=ss;
                    }Here you are reading more lines from the client and adding it to itself then throwing it away next time around the loop.
                    System.out.println("client message "+ss);... so this can't print anything except 'null'.
               pw.write("hello");Here you are printing one line to the server. So the server won't ever do anything in the readLine() loop above. Then you are exiting the client without closing the socket or its output stream so the server gets a 'connection reset'.