NetBeans/src/model/Transmitter.java

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package model;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Observable;
import java.util.logging.Level;
import java.util.logging.Logger;
import logger.OhmLogger;

/**
 *
 * @author Apollo
 */
public class Transmitter extends Observable implements Runnable
{
  private static final Logger lg = OhmLogger.getLogger();
  private static final int PORT = 35000;
  private static final String IP_ADRESSE = "127.0.0.1";
  
  int modus;
  public Transmitter(int modus)
  {
   
  }

  @Override
  public void run()
  {
    if(modus == 0)
    {
      try
      {
        server();
      }
      catch (IOException ex)
      {
        Logger.getLogger(Transmitter.class.getName()).log(Level.SEVERE, null, ex);
      }
    }
    else if(modus == 1)
    {
      try
      {
        client();
      }
      catch (IOException ex)
      {
        Logger.getLogger(Transmitter.class.getName()).log(Level.SEVERE, null, ex);
      }
    }
  }
  
  public void client() throws IOException
  {
    lg.info("Client: verbinde ...");
    Socket s = new Socket(IP_ADRESSE, PORT); // Achtung: blockiert!
    lg.info("Client: Verbindung hergestellt");
    InputStream iStream = s.getInputStream();
    OutputStream oStream = s.getOutputStream();
    
    InputStreamReader isr = new InputStreamReader(iStream, "UTF-8");
    OutputStreamWriter osr = new OutputStreamWriter(oStream, "UTF-8");
    
    BufferedReader in = new BufferedReader(isr);
    //BufferedWriter out = new BufferedWriter(osr);
    PrintWriter out = new PrintWriter(osr);
    
    lg.info("Client: Stream initialisiert");
    
    out.println("Hallo Du Server Du - ich bin der client");
    out.flush(); // wirklich absenden!!
    
    lg.info("Client: Nachricht versendet");
    
    String quittung = in.readLine(); // Achtung blockiert
    lg.info("Client: Quittung empfangen");

    System.out.println("Client: Quittung EMPFANGEN - " + quittung);

    
    
    out.close();
    in.close();
  }

  public void server() throws IOException
  {
    ServerSocket sSocket = new ServerSocket(PORT);  
    lg.info("Server: Warte auf Verbindung ...");
    Socket s = sSocket.accept(); // Achtung: blockiert!
    lg.info("Server: Verbindung akzeptiert");
    InputStream iStream = s.getInputStream();
    OutputStream oStream = s.getOutputStream();
    
    InputStreamReader isr = new InputStreamReader(iStream, "UTF-8");
    OutputStreamWriter osr = new OutputStreamWriter(oStream, "UTF-8");
    
    BufferedReader in = new BufferedReader(isr);
    //BufferedWriter out = new BufferedWriter(osr);
    PrintWriter out = new PrintWriter(osr);
    
    lg.info("Server: Stream initialisiert");
    lg.info("Server: warte auf Nachricht ...");
    
    String nachricht = in.readLine(); // Achtung blockiert
    lg.info("Server: Nachricht empfangen");

    System.out.println("Server: NACHRICHT EMPFANGEN - " + nachricht);

    out.println("Server -> ich habe die Nachricht erhalten");
    lg.info("Server: Quittung versendet");
    
    out.flush(); // wirklich absenden!!
    
    out.close();
    in.close();
  }
}