Archief - [PROG][JAVA] Chat client

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("127.0.0.1", 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();
    }
}

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

public class KnockKnockServer
{
	
    public static void main(String[] args) throws IOException 
    {
        ServerSocket serverSocket = null;
        try 
        {
            serverSocket = new ServerSocket(4444);
        } 
        catch (IOException e) 
        {
            System.err.println("Could not listen on port: 4444.");
            System.exit(1);
        }

        Socket clientSocket = null;
        try 
        {
            clientSocket = serverSocket.accept();
        } 
        catch (IOException e) 
        {
            System.err.println("Accept failed.");
            System.exit(1);
        }
		
		Input inp = new Input();
        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        String inputLine, outputLine;

        outputLine = inp.readLine();
        out.println(outputLine);

        while ((inputLine = in.readLine()) != null) 
        {
        	System.out.println("Client: " + inputLine);
             outputLine = inp.readLine();
             out.println(outputLine);
             if (outputLine.equals("Bye.")) break;
        }
        out.close();
        in.close();
        clientSocket.close();
        serverSocket.close();
    }
}