When client send file connection with server close

Question

please help me.
i want to transfer a file via server - client model.
Client send the file, server receive it.
Then when i send a msg from server to client i have this error:
java.net.SocketException: socket closed
why the socket closed?

Answer 1

client waiting for response. i don't know what to do.
the client code is:
import java.net.*;
import java.io.*;                              
class Client{               
     Socket clientSocket;               
       byte[] byteArray;                    
       BufferedInputStream bis;          
        BufferedOutputStream bos;          
       int in;                                   
       BufferedReader inm = null;
        PrintWriter outm = null;
       public Client(){
         try{
                clientSocket = new Socket("localhost", 9632);
               System.out.println("i am client & connect");
               inm = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
               outm = new PrintWriter(clientSocket.getOutputStream(), true);
               System.out.println("------1--------" +clientSocket.isClosed());
                  outm.println("msg 1: hi");
                  System.out.println("from server__ " +inm.readLine());
                  outm.println("msg 2: now i will send you a file");
                  System.out.println("from server__ " +inm.readLine());
                  sendFile();
                 System.out.println("-------2-------" +clientSocket.isClosed());
                  System.out.println("from server__ " +inm.readLine());
         catch(IOException e){
                e.printStackTrace();
       public void sendFile(){
            try{
                 bis = new BufferedInputStream(new FileInputStream("encryptAtmMsg.txt"));
                bos = new BufferedOutputStream(clientSocket.getOutputStream());
                byteArray = new byte[8192];
                while ((in = bis.read(byteArray)) != -1){
                   bos.write(byteArray,0,in);
                    bis.close();
                  bos.close();
           catch(IOException e){
                e.printStackTrace();
       public static void main(String[] args){
         new Client();
}And server code is:
import java.net.*;
import java.io.*;
class Server{
     BufferedInputStream bis;
       BufferedOutputStream bos;
       byte[] data;
       Socket socket;
       ServerSocket serverSocket;
       int in;
        BufferedReader inm = null;
        PrintWriter outm = null;
       public Server(){
         try{
                serverSocket = new ServerSocket(9632);
                System.out.println("i am server & listening...");
               socket = serverSocket.accept();
                 System.out.println("a client connect");
               System.out.println("------1--------" +socket.isClosed());
                inm = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                outm = new PrintWriter(socket.getOutputStream(), true);
               System.out.println("from client: " +inm.readLine());
                 outm.println("ack 1: hi....");
                 System.out.println("from client: " +inm.readLine());
                 outm.println("ack 2: ok....");
                receiveFile();
                  System.out.println("------2--------" +socket.isClosed());
               outm.println("ack 3: take the file");
         catch (IOException e){
              e.printStackTrace();
     public void receiveFile(){
          try{
              byte[] receivedData = new byte[8192];
             bis = new BufferedInputStream(socket.getInputStream());
               bos = new BufferedOutputStream(new FileOutputStream("encryptAtmMsg22.txt"));
             while ((in = bis.read(receivedData)) != -1){
                   bos.write(receivedData,0,in);
             bos.close();
         catch (IOException e){
              e.printStackTrace();
     public static void main(String[] args){
         new Server();
}any idea pls