import java.io.*;import java.net.*;public class KnockKnockClient {    public static void main(String[] args) throws IOException {        Socket kkSocket = null;        PrintWriter out = null;        BufferedReader in = null;        try {            kkSocket = new Socket("taranis", 4444);            out = new PrintWriter(kkSocket.getOutputStream(), true);            in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));        } catch (UnknownHostException e) {            System.err.println("Don't know about host: taranis.");            System.exit(1);        } catch (IOException e) {            System.err.println("Couldn't get I/O for the connection to: taranis.");            System.exit(1);        }        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));        String fromServer;        String fromUser;        while ((fromServer = in.readLine()) != null) {            System.out.println("Server: " + fromServer);            if (fromServer.equals("Bye."))                break;		                fromUser = stdIn.readLine();	    if (fromUser != null) {                System.out.println("Client: " + fromUser);                out.println(fromUser);	    }        }        out.close();        in.close();        stdIn.close();        kkSocket.close();    }}