Simple socket connections

Question

Hey,
I've been dabbling around with sockets lately, and I attempted to create a simple program that allows the client to send messages to the server. However, messages are not being either sent, or received (or both). I do know that the client IS detected and accepted by the server, and that the server is started properly on socket 9999. Here is the code I'm using:
Client.java:
      public static void main(String [] args){
          Socket client = null;
          DataOutputStream output = null;
          DataInputStream input = null;
          Scanner clientInput = new Scanner(System.in);
          InetAddress address = null;
          try{
           address = InetAddress.getLocalHost();
          System.out.println(address);
          catch(UnknownHostException e){
               System.out.println(e);
          try{
               client = new Socket(address, 9999);
               output = new DataOutputStream(client.getOutputStream());
               input = new DataInputStream(client.getInputStream());
          catch(UnknownHostException e){
               System.out.println("Cant find host");
          catch(IOException e){
               System.out.println("IO Exception");
               System.out.println(e);
     //     System.out.println("checkOne");
          if(client != null && output != null && input != null){
               try{
                    boolean redo = true;
                    while(redo){
                         System.out.print("Send to server: ");
                         String text = clientInput.nextLine();
                         if(!(text.equals("!")))
                              output.writeBytes(text);
                         else
                              redo = false;
                         System.out.println();
               catch(IOException e){
                    System.out.println(e);
          try{
          output.close();
          input.close();
          client.close();
          catch(Exception e){
               System.out.println(e);
Server.java:
     public static void main(String [] args){
          ServerSocket server = null;
          Socket client = null;
          DataInputStream input = null;
          PrintStream output = null;
          String line = "";
          try{
               server = new ServerSocket(9999);
               System.out.println("Server started on socket 9999");
          catch(Exception e){
               System.out.println(e);
          try{
               client = server.accept();
               System.out.println("Client detected");
               input = new DataInputStream(client.getInputStream());
               output = new PrintStream(client.getOutputStream());
               while(true){
                    line = input.readLine();
                    output.println(line);
          catch(Exception e){
               System.out.println(e);
     }Could you please tell me what I did wrong with the above code? Did I forget to close a socket, send data incorrectly, or what?
Thanks,
Chris

Answer 1

Chris.Y wrote:
Client.java:
                         if(!(text.equals("!")))
                              output.writeBytes(text);
                         else
That might need to be something like
                         if(!(text.equals("!"))) {
                              output.writeBytes(text);
                              output.writeBytes("\015\012"); // append CR LF
                         elseto satisfy readLine() in the server.