Socket Communication. Read single line by line from Client side.

[Srivatsa Sri]

Hi everybody,

I am developing a console based login. But i am struck with the following error in code here. I will explain it briefly : As said earlier, a console based login which will check the user name, then password. I am not able to send it single line by line, first username and next password. My code :

Server.java

import java.net.*; 
import java.io.*; 

public class Server extends Thread
{ 
 protected Socket clientSocket;

 public static void main(String[] args) throws IOException 
   { 
    ServerSocket serverSocket = null; 

    try { 
         serverSocket = new ServerSocket(2013); 
         System.out.println ("Connection Socket Created");
         try { 
              while (true)
                 {
                  System.out.println ("Waiting for Connection");
                  new Server (serverSocket.accept()); 
                 }
             } 
         catch (IOException e) 
             { 
              System.err.println("Accept failed."); 
              System.exit(1); 
             } 
        } 
    catch (IOException e) 
        { 
         System.err.println("Could not listen on port"); 
         System.exit(1); 
        } 
    finally
        {
         try {
              serverSocket.close(); 
             }
         catch (IOException e)
             { 
              System.err.println("Could not close port"); 
              System.exit(1); 
             } 
        }
   }

 private Server (Socket clientSoc)
   {
    clientSocket = clientSoc;
    start();
   }

 public void run()
   {
    System.out.println ("New Communication Thread Started");

    try { 
         PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), 
                                      true); 
         PrintWriter out1 = new PrintWriter(clientSocket.getOutputStream(), 
                                      true); 
         BufferedReader in = new BufferedReader( 
                 new InputStreamReader( clientSocket.getInputStream())); 
         BufferedReader in1 = new BufferedReader( 
                 new InputStreamReader( clientSocket.getInputStream())); 

         String inputLine,u,p; 

         while ((u = in.readLine()) != null && (p = in.readLine()) != null)
             { 
              System.out.println ("" + u); 
              out1.println(u); 
           /*while((p = in.readLine()) != null){*/
              System.out.println ("" + p); 
              out1.println(p); 

              if (u.equals("Bye.")) 
                  break; 
             } 
//}
         out1.close(); 
         out.close();
         //in1.close(); 
         in.close(); 
         clientSocket.close(); 
        } 
    catch (IOException e) 
        { 
         System.err.println("Problem with Communication Server");
         System.exit(1); 
        } 
    }
} 

Client.java

import java.io.*;
import java.net.*;
import java.lang.*;
import java.io.Console;

public class Client {
    public static void main(String[] args) throws IOException {

        String serverHostname = new String ("127.0.0.1");

        if (args.length > 0)
           serverHostname = args[0];
        System.out.println ("Attemping to connect to host " +
                serverHostname + " on port ");

        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;
        BufferedReader in1 = null;

        try {
            echoSocket = new Socket(serverHostname, 2013);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(
                                        echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: " + serverHostname);
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for "
                               + "the connection to: " + serverHostname);
            System.exit(1);
        }

	BufferedReader stdIn = new BufferedReader(
                                   new InputStreamReader(System.in));
        BufferedReader std = new BufferedReader(
                                   new InputStreamReader(System.in));
	String upwd,uname,text;
        Console console = System.console();
        String username = console.readLine("Username:");
        char[] pwd = console.readPassword("Password:");
        upwd=new String(pwd);
        
 while (username!=null && upwd!=null && (uname = stdIn.readLine()) != null)
           {
            //username=stdIn.readLine();
            out.println("Username:"+username);
            
            //upwd=stdIn.readLine();
	    out.println("Password:"+upwd);

            // end loop
            if (uname.equals("Bye."))
                break;

	   // System.out.println("echo: " + in.readLine());
            //System.out.println("echo_: " + in1.readLine());
	   }
        
	out.close();
        
	//in.close();
       // in1.close();
	stdIn.close();
	echoSocket.close();
        out.flush();
    }
}

Please help me with this.