Init mit Aufgabe10

build.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<!-- You may freely edit this file. See commented blocks below for -->
+<!-- some examples of how to customize the build. -->
+<!-- (If you delete it and reopen the project it will be recreated.) -->
+<!-- By default, only the Clean and Build commands use this build script. -->
+<!-- Commands such as Run, Debug, and Test only use this build script if -->
+<!-- the Compile on Save feature is turned off for the project. -->
+<!-- You can turn off the Compile on Save (or Deploy on Save) setting -->
+<!-- in the project's Project Properties dialog box.-->
+<project name="Aufgabe11_GrafChat" default="default" basedir=".">
+    <description>Builds, tests, and runs the project Aufgabe11_GrafChat.</description>
+    <import file="nbproject/build-impl.xml"/>
+    <!--
+
+    There exist several targets which are by default empty and which can be 
+    used for execution of your tasks. These targets are usually executed 
+    before and after some main targets. They are: 
+
+      -pre-init:                 called before initialization of project properties
+      -post-init:                called after initialization of project properties
+      -pre-compile:              called before javac compilation
+      -post-compile:             called after javac compilation
+      -pre-compile-single:       called before javac compilation of single file
+      -post-compile-single:      called after javac compilation of single file
+      -pre-compile-test:         called before javac compilation of JUnit tests
+      -post-compile-test:        called after javac compilation of JUnit tests
+      -pre-compile-test-single:  called before javac compilation of single JUnit test
+      -post-compile-test-single: called after javac compilation of single JUunit test
+      -pre-jar:                  called before JAR building
+      -post-jar:                 called after JAR building
+      -post-clean:               called after cleaning build products
+
+    (Targets beginning with '-' are not intended to be called on their own.)
+
+    Example of inserting an obfuscator after compilation could look like this:
+
+        <target name="-post-compile">
+            <obfuscate>
+                <fileset dir="${build.classes.dir}"/>
+            </obfuscate>
+        </target>
+
+    For list of available properties check the imported 
+    nbproject/build-impl.xml file. 
+
+
+    Another way to customize the build is by overriding existing main targets.
+    The targets of interest are: 
+
+      -init-macrodef-javac:     defines macro for javac compilation
+      -init-macrodef-junit:     defines macro for junit execution
+      -init-macrodef-debug:     defines macro for class debugging
+      -init-macrodef-java:      defines macro for class execution
+      -do-jar:                  JAR building
+      run:                      execution of project 
+      -javadoc-build:           Javadoc generation
+      test-report:              JUnit report generation
+
+    An example of overriding the target for project execution could look like this:
+
+        <target name="run" depends="Aufgabe11_GrafChat-impl.jar">
+            <exec dir="bin" executable="launcher.exe">
+                <arg file="${dist.jar}"/>
+            </exec>
+        </target>
+
+    Notice that the overridden target depends on the jar target and not only on 
+    the compile target as the regular run target does. Again, for a list of available 
+    properties which you can use, check the target you are overriding in the
+    nbproject/build-impl.xml file. 
+
+    -->
+</project>

manifest.mf

+Manifest-Version: 1.0
+X-COMMENT: Main-Class will be added automatically by build
+

nbproject/genfiles.properties

+build.xml.data.CRC32=05f3ad23
+build.xml.script.CRC32=1a88b66a
+build.xml.stylesheet.CRC32=f85dc8f2@1.108.0.48
+# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
+# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
+nbproject/build-impl.xml.data.CRC32=05f3ad23
+nbproject/build-impl.xml.script.CRC32=fdc076e6
+nbproject/build-impl.xml.stylesheet.CRC32=12e0a6c2@1.108.0.48

nbproject/project.properties

+annotation.processing.enabled=true
+annotation.processing.enabled.in.editor=false
+annotation.processing.processors.list=
+annotation.processing.run.all.processors=true
+annotation.processing.source.output=${build.generated.sources.dir}/ap-source-output
+application.title=Aufgabe11_GrafChat
+application.vendor=le
+build.classes.dir=${build.dir}/classes
+build.classes.excludes=**/*.java,**/*.form
+# This directory is removed when the project is cleaned:
+build.dir=build
+build.generated.dir=${build.dir}/generated
+build.generated.sources.dir=${build.dir}/generated-sources
+# Only compile against the classpath explicitly listed here:
+build.sysclasspath=ignore
+build.test.classes.dir=${build.dir}/test/classes
+build.test.results.dir=${build.dir}/test/results
+# Uncomment to specify the preferred debugger connection transport:
+#debug.transport=dt_socket
+debug.classpath=\
+    ${run.classpath}
+debug.modulepath=\
+    ${run.modulepath}
+debug.test.classpath=\
+    ${run.test.classpath}
+debug.test.modulepath=\
+    ${run.test.modulepath}
+# Files in build.classes.dir which should be excluded from distribution jar
+dist.archive.excludes=
+# This directory is removed when the project is cleaned:
+dist.dir=dist
+dist.jar=${dist.dir}/Aufgabe11_GrafChat.jar
+dist.javadoc.dir=${dist.dir}/javadoc
+dist.jlink.dir=${dist.dir}/jlink
+dist.jlink.output=${dist.jlink.dir}/Aufgabe11_GrafChat
+endorsed.classpath=
+excludes=
+includes=**
+jar.compress=false
+javac.classpath=
+# Space-separated list of extra javac options
+javac.compilerargs=
+javac.deprecation=false
+javac.external.vm=true
+javac.modulepath=
+javac.processormodulepath=
+javac.processorpath=\
+    ${javac.classpath}
+javac.source=17
+javac.target=17
+javac.test.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+javac.test.modulepath=\
+    ${javac.modulepath}
+javac.test.processorpath=\
+    ${javac.test.classpath}
+javadoc.additionalparam=
+javadoc.author=false
+javadoc.encoding=${source.encoding}
+javadoc.html5=false
+javadoc.noindex=false
+javadoc.nonavbar=false
+javadoc.notree=false
+javadoc.private=false
+javadoc.splitindex=true
+javadoc.use=true
+javadoc.version=false
+javadoc.windowtitle=
+# The jlink additional root modules to resolve
+jlink.additionalmodules=
+# The jlink additional command line parameters
+jlink.additionalparam=
+jlink.launcher=true
+jlink.launcher.name=Aufgabe11_GrafChat
+main.class=ChatProgramm.Start
+manifest.file=manifest.mf
+meta.inf.dir=${src.dir}/META-INF
+mkdist.disabled=false
+platform.active=default_platform
+run.classpath=\
+    ${javac.classpath}:\
+    ${build.classes.dir}
+# Space-separated list of JVM arguments used when running the project.
+# You may also define separate properties like run-sys-prop.name=value instead of -Dname=value.
+# To set system properties for unit tests define test-sys-prop.name=value:
+run.jvmargs=
+run.modulepath=\
+    ${javac.modulepath}
+run.test.classpath=\
+    ${javac.test.classpath}:\
+    ${build.test.classes.dir}
+run.test.modulepath=\
+    ${javac.test.modulepath}
+source.encoding=UTF-8
+src.dir=src
+test.src.dir=test

nbproject/project.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.java.j2seproject</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/j2se-project/3">
+            <name>Aufgabe11_GrafChat</name>
+            <source-roots>
+                <root id="src.dir"/>
+            </source-roots>
+            <test-roots>
+                <root id="test.src.dir"/>
+            </test-roots>
+        </data>
+    </configuration>
+</project>

src/ChatProgramm/Start.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
+ */
+
+package ChatProgramm;
+
+import ChatProgramm.controller.CommandController;
+import ChatProgramm.view.ChatView;
+import javax.swing.JOptionPane;
+import javax.swing.UIManager;
+
+/**
+ * Builder Class
+ * @author le
+ */
+public class Start
+{
+  public Start()
+  {
+    ChatView view = new ChatView();
+    CommandController controller_commands = new CommandController(view);
+    controller_commands.registerEvents();
+    controller_commands.registerCommands();
+    view.setVisible(true);
+  }
+
+  /**
+   * @param args the command line arguments
+   */
+  public static void main(String[] args) 
+  {
+    try
+    {
+      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+    }
+    catch (Exception ex)
+    {
+      JOptionPane.showMessageDialog(null, ex.toString());
+    }
+    new Start();
+  }
+}

src/ChatProgramm/controller/CommandController.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.controller;
+
+import ChatProgramm.controller.commands.CommandConnect;
+import ChatProgramm.controller.commands.CommandInvoker;
+import ChatProgramm.controller.commands.CommandSend;
+import ChatProgramm.view.ChatView;
+import java.awt.Component;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+/**
+ *
+ * @author ahren
+ */
+public class CommandController implements ActionListener{
+    
+    private ChatView view;
+    private CommandInvoker invoker;
+        
+    public CommandController(ChatView view){
+        this.view = view;
+        this.invoker = new CommandInvoker();
+    }
+    
+    public void registerEvents(){
+        view.getBtnConnect().addActionListener(this); 
+        view.getTfNachricht().addActionListener(this);
+    }
+    
+    public void registerCommands(){
+        CommandSend commandSend = new CommandSend(view);
+        invoker.addCommand(view.getBtnConnect(), new CommandConnect(view, commandSend));
+        invoker.addCommand(view.getTfNachricht(), commandSend);
+    }
+
+    /**
+     * Ausführen des jeweiligen Kommandos
+     * @param e Referenz auf das Event
+     */
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        Component key = (Component)e.getSource();
+        invoker.executeCommand(key);
+//        if(key == view.getBtnOpen()|| key==view.getMiOpen())
+//          invoker.deleteStack();
+//        }
+    }
+    
+}
+
+

src/ChatProgramm/controller/commands/CommandConnect.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.controller.commands;
+
+import ChatProgramm.model.Client;
+import ChatProgramm.model.Server;
+import ChatProgramm.util.OhmLogger;
+import ChatProgramm.view.ChatView;
+import java.io.IOException;
+import java.util.logging.Logger;
+import javax.swing.JDialog;
+import javax.swing.JRadioButton;
+
+/**
+ *
+ * @author ahren
+ */
+public class CommandConnect implements CommandInterface
+{
+    private JRadioButton rBtnServer;
+    private JRadioButton rBtnClient;
+    private JDialog dialogFenster;
+    private static Logger lg = OhmLogger.getLogger();
+    private CommandSend commandSend;
+    private ChatView view;
+    
+    public CommandConnect(ChatView view, CommandInterface value)
+  {
+      rBtnServer = view.getBtnServer();
+      rBtnClient = view.getBtnClient();
+      dialogFenster = view.getjDialog1();
+
+      commandSend = (CommandSend) value;
+
+      this.view = view;
+  }
+
+  @Override
+  public void execute()
+  {
+      if(rBtnServer.isSelected()){
+          lg.info("Server ausgewählt");
+          try {
+             commandSend.transmitterInterface =  new Server(view);
+          } catch (IOException ex) {
+              lg.info("Die Verbindung zum Server ist Fehlgeschlagen");
+          }
+      }
+      
+      if(rBtnClient.isSelected()){
+          lg.info("Client ausgewählt");
+          try {
+              commandSend.transmitterInterface =  new Client(view);
+          } catch (IOException ex) {
+              lg.info("Die Verbindung zum Client ist Fehlgeschlagen");
+
+          }
+      }
+      
+      dialogFenster.setVisible(false);
+  }
+
+  @Override
+  public boolean isUndoable()
+  {
+    return false;
+  }
+
+  @Override
+  public void undo()
+  {
+  }
+}

src/ChatProgramm/controller/commands/CommandInterface.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.controller.commands;
+
+/**
+ *
+ * @author ahren
+ */
+public interface CommandInterface
+{
+  public void execute();
+  public void undo();
+  public boolean isUndoable();
+}

src/ChatProgramm/controller/commands/CommandInvoker.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.controller.commands;
+
+import java.awt.Component;
+import java.util.HashMap;
+import java.util.Stack;
+
+/**
+ *
+ * @author ahren
+ */
+public class CommandInvoker {
+    
+    private HashMap<Component, CommandInterface> commands;
+    private Stack <CommandInterface> undoStack;
+    
+    public CommandInvoker(){
+        commands = new HashMap<>();
+        undoStack = new Stack();  
+    }
+    
+    /**
+    * Fügt ein Kommando zur Kommando-"Datenbank" = HashMap hinzu
+    * @param key Quelle des Events
+    * @param value Referenz auf das zugehörige Kommando-Objekt
+    */
+    public void addCommand(Component key, CommandInterface value){
+        commands.put(key, value);
+    }
+    
+    /**
+    * Führt Kommando der Eventquelle "key" aus und legt die Referenz
+    * des Kommando in den Undo-Stack
+    * @param key Referenz auf die Eventquelle
+    */
+    public void executeCommand(Component key){
+      CommandInterface command = commands.get(key);
+      command.execute();
+      if (command.isUndoable())
+      {
+        undoStack.push(command);
+      }
+    }
+    /**
+    * Falls der Stack Elemente enthält, wird das oberste Element geholt
+    * und die Methode "undo" des Commands aufgerufen
+    */
+    public void undoCommand()
+    {
+      if (!undoStack.isEmpty())
+      {
+        undoStack.pop().undo();
+      }
+    }
+
+    /**
+     * Löscht bei Öffnen einer neuen Datei den Stack
+     */
+    public void deleteStack()
+    {
+      while(!undoStack.isEmpty())
+        undoStack.pop();
+    }
+    
+}

src/ChatProgramm/controller/commands/CommandSend.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.controller.commands;
+
+import ChatProgramm.model.Client;
+import ChatProgramm.model.Server;
+import ChatProgramm.model.TransmitterInterface;
+import ChatProgramm.util.OhmLogger;
+import ChatProgramm.view.ChatView;
+import java.util.logging.Logger;
+import javax.swing.JTextField;
+import ChatProgramm.model.Nachricht;
+
+/**
+ *
+ * @author ahren
+ */
+public class CommandSend implements CommandInterface
+{
+  private static Logger lg = OhmLogger.getLogger();
+  private JTextField eingabeFeld;
+  private String nachricht;
+  private ChatView view;
+  public TransmitterInterface transmitterInterface;
+  public Server server;
+  public Client client;
+
+
+  
+    
+  public CommandSend(ChatView view)
+  {
+      this.view = view;
+      this.eingabeFeld = view.getTfNachricht();
+      transmitterInterface = null;
+  }
+
+  @Override
+  public void execute()
+  {
+      if(transmitterInterface != null && !eingabeFeld.getText().isEmpty()){
+          transmitterInterface.send(eingabeFeld.getText());
+          eingabeFeld.setText("");
+      }
+  }
+
+
+  @Override
+  public boolean isUndoable()
+  {
+    return false;
+  }
+
+  @Override
+  public void undo()
+  {
+  }
+}

src/ChatProgramm/model/Client.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
+ */
+package ChatProgramm.model;
+
+import ChatProgramm.view.ChatView;
+import java.io.IOException;
+import java.net.Socket;
+import java.util.logging.*;
+
+/**
+ * Builder Class
+ *
+ * @author le
+ */
+public class Client extends Transmitter {
+
+    private static Logger lg = Logger.getLogger("netz");
+    private static final int PORT = 35000; //lt. iana port > 2¹⁵
+    private static final String IP = "127.0.0.1";
+    
+
+    public Client(ChatView view) throws IOException {
+        super(view);
+        connect();
+        initIO();
+    }
+
+
+    @Override
+    public void connect() throws IOException {
+        try {
+            lg.info("Client: Verbindung wird aufgebaut");
+            socket = new Socket(IP, PORT);
+            lg.info("Client: Verbindung aufgebaut");
+        } catch (java.io.InterruptedIOException e) {
+            lg.warning("Timeout" + "(" + timeout / 1000 + "s)");
+        }
+    }
+}

src/ChatProgramm/model/Nachricht.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+package ChatProgramm.model;
+
+/**
+ *
+ * @author ahren
+ */
+public class Nachricht 
+{
+  private String nachricht;
+    
+  public Nachricht(String nachricht)
+  {
+    this.nachricht = nachricht;
+  }
+
+  /**
+   * @return the nachricht
+   */
+  public String getNachricht() {
+    return nachricht;
+  }
+
+  public void setNachricht(String nachricht) {
+    this.nachricht = nachricht;
+  }
+}

src/ChatProgramm/model/ReceiveAdapter.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package ChatProgramm.model;
+
+import ChatProgramm.view.ChatView;
+import java.util.concurrent.Flow;
+import java.util.concurrent.Flow.Subscriber;
+
+/**
+ *
+ * @author ahren
+ */
+public class ReceiveAdapter implements Subscriber<Nachricht> {
+
+    private ChatView view;
+    private Flow.Subscription subscription;
+
+    public ReceiveAdapter(ChatView view) {
+        this.view = view;
+    }
+
+    @Override
+    public void onSubscribe(Flow.Subscription subscription) {
+        this.subscription = subscription;
+        this.subscription.request(1);
+    }
+
+    @Override
+    public void onNext(Nachricht item) {
+
+        view.getTxtChat().append(item.getNachricht());
+        this.subscription.request(1);
+    }
+
+    @Override
+    public void onError(Throwable throwable) {
+    }
+
+    @Override
+    public void onComplete(){
+    }
+}

src/ChatProgramm/model/Server.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
+ */
+
+package ChatProgramm.model;
+
+import ChatProgramm.view.ChatView;
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.logging.*;
+
+/**
+ * Builder Class
+ * @author le
+ */
+public class Server extends Transmitter
+{
+  private static Logger lg = Logger.getLogger("netz");  
+  private static final int PORT = 35000; //lt. iana port > 2¹⁵
+  
+  
+  public void connect() throws IOException
+  {
+      try
+      {
+          ServerSocket sSocket = new ServerSocket(PORT);
+          sSocket.setSoTimeout(timeout);
+          lg.info("Server: warte auf Verbindung");
+          socket = sSocket.accept();
+          lg.info("Server: Verbindung akzeptiert");
+      }
+      catch ( java.io.InterruptedIOException e )
+      {
+          lg.warning("Timeout"+"("+timeout/1000+"s)");
+      }
+  }
+    public Server(ChatView view) throws IOException {
+        super(view);
+        connect();
+        initIO();
+
+
+  }
+}

src/ChatProgramm/model/Transmitter.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package ChatProgramm.model;
+
+import ChatProgramm.view.ChatView;
+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.io.UnsupportedEncodingException;
+import java.net.Socket;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Flow;
+import java.util.concurrent.Flow.Subscriber;
+import java.util.concurrent.SubmissionPublisher;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author ahren
+ */
+public abstract class Transmitter implements Runnable, Subscriber<String>, TransmitterInterface {
+
+    static final int timeout = 60000;
+    private static final int PORT = 35000;
+
+    private static Logger lg = Logger.getLogger("netz");
+
+    protected Socket socket;
+    protected BufferedReader reader;
+    protected PrintWriter writer;
+    
+    private Nachricht nachricht;
+    private String txtNachricht;
+    private boolean laufend;
+    private SubmissionPublisher<Nachricht> textPublisher;
+    private ExecutorService eService;
+    private String receivedString;
+    private ChatView view;
+    private ReceiveAdapter receiveAdapter;
+    
+    public Transmitter(ChatView view)
+    {
+      socket = new Socket();
+      eService = null;
+      receiveAdapter = new ReceiveAdapter(view);
+      textPublisher = new SubmissionPublisher<>();
+      this.view = view;
+      addWertSubscription(receiveAdapter);
+      nachricht = new Nachricht("");
+    }
+    
+     public void addWertSubscription(Subscriber<Nachricht> subscriber)
+    {
+      textPublisher.subscribe(subscriber);
+    }
+
+    public abstract void connect() throws IOException;
+
+    public void initIO() {
+      try {
+        lg.info("Initialisiere reader und writer");
+        InputStream is = socket.getInputStream();
+        OutputStream os = socket.getOutputStream();
+
+        InputStreamReader isr = new InputStreamReader(is, "UTF-8");
+        OutputStreamWriter osr = new OutputStreamWriter(os, "UTF-8");
+
+        reader = new BufferedReader(isr);
+        writer = new PrintWriter(osr);
+        lg.info("Reader / Writer Initialisierung abgeschlossen");
+        startempfangen();
+        lg.info("Warte auf Nachricht");
+
+      } catch (UnsupportedEncodingException ex) {
+        Logger.getLogger(Transmitter.class.getName()).log(Level.SEVERE, null, ex);
+      } catch (IOException ex) {
+        Logger.getLogger(Transmitter.class.getName()).log(Level.SEVERE, null, ex);
+      }
+    }
+    
+    public void send(String txtNachricht){
+
+        writer.println(txtNachricht);
+        writer.flush();
+        lg.info("Nachricht gesendet");
+        nachricht.setNachricht("\nDu: " + txtNachricht);
+        textPublisher.submit(nachricht);
+    }
+    public Nachricht receive(){
+      try {
+        txtNachricht = reader.readLine();
+        if(!txtNachricht.isEmpty()){
+          lg.info("Nachricht erhalten");
+          nachricht.setNachricht("\nEr / Sie: " + txtNachricht);
+          return nachricht;
+        }
+
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+      return nachricht;
+    }
+    
+//    public void disconnect (){
+//    in.close();
+//    out.close();
+//    s.close();
+//    }
+    
+    @Override
+    public void run() {
+      while (true) {
+        lg.info("Warte auf Nachricht");
+        if(laufend) {
+          nachricht = receive();
+          if(!nachricht.getNachricht().isEmpty()){
+              textPublisher.submit(nachricht);
+          }
+        }
+        else{
+          break;
+        }
+      }
+    }
+
+
+    @Override
+    public void onSubscribe(Flow.Subscription subscription) {
+        throw new UnsupportedOperationException("Not supported yet."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public void onNext(String item) {
+        throw new UnsupportedOperationException("Not supported yet."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public void onError(Throwable throwable) {
+        throw new UnsupportedOperationException("Not supported yet."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+    @Override
+    public void onComplete() {
+        throw new UnsupportedOperationException("Not supported yet."); // Generated from nbfs://nbhost/SystemFileSystem/Templates/Classes/Code/GeneratedMethodBody
+    }
+
+  private void startempfangen()
+  {
+    synchronized (this){
+    laufend = true;
+    }
+    if (eService == null){
+        eService = Executors.newSingleThreadExecutor();
+        eService.execute(this);
+    }
+    lg.info("Starte Chat");
+  }
+}

src/ChatProgramm/model/TransmitterInterface.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Interface.java to edit this template
+ */
+package ChatProgramm.model;
+
+import ChatProgramm.model.Nachricht;
+/**
+ *
+ * @author ahren
+ */
+public interface TransmitterInterface
+{
+    public void send(String txtNachricht);
+    public Nachricht receive();
+
+}

src/ChatProgramm/util/OhmLogger.java

+package ChatProgramm.util;
+
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.time.LocalDateTime;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+//import java.util.Properties;
+import java.util.logging.*;
+
+/**
+ * Klasse zur eigens konfigurierten Log-Ausgabe in der Console
+ * @author ahrens
+ */
+public class OhmLogger
+{
+  private static final String LOGGER_NAME = "OhmLogger";
+  private static Logger lg = null;
+  
+  /**
+   * privater Konstrukter -> Singleton
+   */
+  private OhmLogger() 
+  {
+  }
+  
+  /**
+   * Public Method zum Erstellen des Loggers und zum Aufruf der Methode 
+   * zum Initialisieren
+   * @return Referenz auf Logger
+   */
+  public static Logger getLogger()
+  {
+    if (lg == null)
+    {
+      lg = Logger.getLogger(LOGGER_NAME);
+      initLogger();
+    }
+    return lg;
+  }
+  
+  /**
+   * Methode zum Initialisieren, Suchen der Konfigurationsdatei, Anlegen eines
+   * neuen Console Handlers, Löschen der bisherigen Standard Handler und 
+   * Einfügen des eigenen Handler, Setzen des Levels, je nach Properties
+   */
+  private static void initLogger()
+  {
+    try (InputStream configFile = OhmLogger.class.getClassLoader().getResourceAsStream("config.properties")) {
+      if (configFile != null) {
+        Properties properties = new Properties();
+        properties.load(configFile);
+        java.util.logging.Level classLogLevel = java.util.logging.Level.parse(properties.getProperty("log.level"));
+          
+        
+        ConsoleHandler ch = new ConsoleHandler();
+        ch.setFormatter(new OhmFormatter());
+        lg.setUseParentHandlers(false);
+        lg.getHandlers();
+        lg.addHandler(ch);
+
+
+        lg.setLevel(classLogLevel);
+        
+        String logDirectory = properties.getProperty("log.directory");
+        String logFileName = properties.getProperty("log.filename");
+
+        FileHandler fileHandler = new FileHandler(logDirectory + "/" + logFileName, true);
+        fileHandler.setFormatter(new OhmFormatter());
+        lg.addHandler(fileHandler);
+                      
+            
+      } else {
+        System.err.println("Unable to find config.properties file. OhmLogger will use default settings.");
+      }
+    } catch (IOException | SecurityException e) {
+      System.err.println("Error configuring OhmLogger: " + e.getMessage());
+    }
+    
+  }
+}
+
+/**
+ * Klasse zum Setzen des Formates des Auszugebenden Log-Strings
+ * @author ahren
+ */
+class OhmFormatter extends Formatter
+{
+  @Override
+  public String format(LogRecord record)
+  {
+    String logline = "| ";
+    
+    LocalDateTime ldt = LocalDateTime.now();
+    logline += ldt.toString();
+    logline += " | " + record.getLevel();
+    logline += " | " + record.getSourceClassName();
+    logline += " | " + record.getMessage();
+    logline += " |\n";
+    
+    return logline;
+  }
+}

src/ChatProgramm/view/ChatView.form

+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
+  <NonVisualComponents>
+    <Container class="javax.swing.JDialog" name="dialogChooseMode">
+      <Properties>
+        <Property name="minimumSize" type="java.awt.Dimension" editor="org.netbeans.beaninfo.editors.DimensionEditor">
+          <Dimension value="[278, 208]"/>
+        </Property>
+      </Properties>
+
+      <Layout class="org.netbeans.modules.form.compat2.layouts.DesignGridLayout">
+        <Property name="columns" type="int" value="1"/>
+        <Property name="rows" type="int" value="0"/>
+      </Layout>
+      <SubComponents>
+        <Component class="javax.swing.JLabel" name="lblMode">
+          <Properties>
+            <Property name="text" type="java.lang.String" value="  Choose your mode:"/>
+          </Properties>
+        </Component>
+        <Component class="javax.swing.JRadioButton" name="BtnServer">
+          <Properties>
+            <Property name="buttonGroup" type="javax.swing.ButtonGroup" editor="org.netbeans.modules.form.RADComponent$ButtonGroupPropertyEditor">
+              <ComponentRef name="BtnGrpMode"/>
+            </Property>
+            <Property name="text" type="java.lang.String" value="Server"/>
+          </Properties>
+          <Events>
+            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="BtnServerActionPerformed"/>
+          </Events>
+        </Component>
+        <Component class="javax.swing.JRadioButton" name="BtnClient">
+          <Properties>
+            <Property name="buttonGroup" type="javax.swing.ButtonGroup" editor="org.netbeans.modules.form.RADComponent$ButtonGroupPropertyEditor">
+              <ComponentRef name="BtnGrpMode"/>
+            </Property>
+            <Property name="text" type="java.lang.String" value="Client"/>
+          </Properties>
+          <Events>
+            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="BtnClientActionPerformed"/>
+          </Events>
+        </Component>
+        <Container class="javax.swing.JPanel" name="jPanel1">
+
+          <Layout>
+            <DimensionLayout dim="0">
+              <Group type="103" groupAlignment="0" attributes="0">
+                  <Group type="102" alignment="0" attributes="0">
+                      <EmptySpace pref="65" max="32767" attributes="0"/>
+                      <Component id="BtnConnect" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace pref="76" max="32767" attributes="0"/>
+                  </Group>
+              </Group>
+            </DimensionLayout>
+            <DimensionLayout dim="1">
+              <Group type="103" groupAlignment="0" attributes="0">
+                  <Group type="102" alignment="0" attributes="0">
+                      <EmptySpace max="-2" attributes="0"/>
+                      <Component id="BtnConnect" min="-2" max="-2" attributes="0"/>
+                      <EmptySpace pref="57" max="32767" attributes="0"/>
+                  </Group>
+              </Group>
+            </DimensionLayout>
+          </Layout>
+          <SubComponents>
+            <Component class="javax.swing.JButton" name="BtnConnect">
+              <Properties>
+                <Property name="text" type="java.lang.String" value="Connect"/>
+              </Properties>
+              <Events>
+                <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="BtnConnectActionPerformed"/>
+              </Events>
+            </Component>
+          </SubComponents>
+        </Container>
+      </SubComponents>
+    </Container>
+    <Component class="javax.swing.ButtonGroup" name="BtnGrpMode">
+    </Component>
+  </NonVisualComponents>
+  <Properties>
+    <Property name="defaultCloseOperation" type="int" value="3"/>
+    <Property name="minimumSize" type="java.awt.Dimension" editor="org.netbeans.beaninfo.editors.DimensionEditor">
+      <Dimension value="[568, 548]"/>
+    </Property>
+  </Properties>
+  <SyntheticProperties>
+    <SyntheticProperty name="formSizePolicy" type="int" value="1"/>
+    <SyntheticProperty name="generateCenter" type="boolean" value="false"/>
+  </SyntheticProperties>
+  <Events>
+    <EventHandler event="windowOpened" listener="java.awt.event.WindowListener" parameters="java.awt.event.WindowEvent" handler="formWindowOpened"/>
+  </Events>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+    <AuxValue name="designerSize" type="java.awt.Dimension" value="-84,-19,0,5,115,114,0,18,106,97,118,97,46,97,119,116,46,68,105,109,101,110,115,105,111,110,65,-114,-39,-41,-84,95,68,20,2,0,2,73,0,6,104,101,105,103,104,116,73,0,5,119,105,100,116,104,120,112,0,0,1,44,0,0,1,-112"/>
+  </AuxValues>
+
+  <Layout class="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout"/>
+  <SubComponents>
+    <Component class="javax.swing.JTextField" name="tfNachricht">
+      <Properties>
+        <Property name="toolTipText" type="java.lang.String" value=""/>
+      </Properties>
+      <Events>
+        <EventHandler event="mouseClicked" listener="java.awt.event.MouseListener" parameters="java.awt.event.MouseEvent" handler="tfNachrichtMouseClicked"/>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="tfNachrichtActionPerformed"/>
+      </Events>
+      <Constraints>
+        <Constraint layoutClass="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout" value="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout$BorderConstraintsDescription">
+          <BorderConstraints direction="Last"/>
+        </Constraint>
+      </Constraints>
+    </Component>
+    <Container class="javax.swing.JScrollPane" name="jScrollPane2">
+      <Properties>
+        <Property name="preferredSize" type="java.awt.Dimension" editor="org.netbeans.beaninfo.editors.DimensionEditor">
+          <Dimension value="[238, 150]"/>
+        </Property>
+      </Properties>
+      <AuxValues>
+        <AuxValue name="autoScrollPane" type="java.lang.Boolean" value="true"/>
+      </AuxValues>
+      <Constraints>
+        <Constraint layoutClass="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout" value="org.netbeans.modules.form.compat2.layouts.DesignBorderLayout$BorderConstraintsDescription">
+          <BorderConstraints direction="Center"/>
+        </Constraint>
+      </Constraints>
+
+      <Layout class="org.netbeans.modules.form.compat2.layouts.support.JScrollPaneSupportLayout"/>
+      <SubComponents>
+        <Component class="javax.swing.JTextArea" name="txtChat">
+          <Properties>
+            <Property name="columns" type="int" value="20"/>
+            <Property name="rows" type="int" value="5"/>
+            <Property name="text" type="java.lang.String" value="Chat:"/>
+          </Properties>
+        </Component>
+      </SubComponents>
+    </Container>
+  </SubComponents>
+</Form>

src/ChatProgramm/view/ChatView.java

+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/GUIForms/JFrame.java to edit this template
+ */
+package ChatProgramm.view;
+
+/**
+ *
+ * @author ahren
+ */
+public class ChatView extends javax.swing.JFrame
+{
+
+  /**
+   * Creates new form ChatView
+   */
+  public ChatView()
+  {
+    initComponents();
+  }
+
+  /**
+   * This method is called from within the constructor to initialize the form.
+   * WARNING: Do NOT modify this code. The content of this method is always
+   * regenerated by the Form Editor.
+   */
+  @SuppressWarnings("unchecked")
+  // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+  private void initComponents()
+  {
+
+    dialogChooseMode = new javax.swing.JDialog();
+    lblMode = new javax.swing.JLabel();
+    BtnServer = new javax.swing.JRadioButton();
+    BtnClient = new javax.swing.JRadioButton();
+    jPanel1 = new javax.swing.JPanel();
+    BtnConnect = new javax.swing.JButton();
+    BtnGrpMode = new javax.swing.ButtonGroup();
+    tfNachricht = new javax.swing.JTextField();
+    jScrollPane2 = new javax.swing.JScrollPane();
+    txtChat = new javax.swing.JTextArea();
+
+    dialogChooseMode.setMinimumSize(new java.awt.Dimension(278, 208));
+    dialogChooseMode.getContentPane().setLayout(new java.awt.GridLayout(0, 1));
+
+    lblMode.setText("  Choose your mode:");
+    dialogChooseMode.getContentPane().add(lblMode);
+
+    BtnGrpMode.add(BtnServer);
+    BtnServer.setText("Server");
+    BtnServer.addActionListener(new java.awt.event.ActionListener()
+    {
+      public void actionPerformed(java.awt.event.ActionEvent evt)
+      {
+        BtnServerActionPerformed(evt);
+      }
+    });
+    dialogChooseMode.getContentPane().add(BtnServer);
+
+    BtnGrpMode.add(BtnClient);
+    BtnClient.setText("Client");
+    BtnClient.addActionListener(new java.awt.event.ActionListener()
+    {
+      public void actionPerformed(java.awt.event.ActionEvent evt)
+      {
+        BtnClientActionPerformed(evt);
+      }
+    });
+    dialogChooseMode.getContentPane().add(BtnClient);
+
+    BtnConnect.setText("Connect");
+    BtnConnect.addActionListener(new java.awt.event.ActionListener()
+    {
+      public void actionPerformed(java.awt.event.ActionEvent evt)
+      {
+        BtnConnectActionPerformed(evt);
+      }
+    });
+
+    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
+    jPanel1.setLayout(jPanel1Layout);
+    jPanel1Layout.setHorizontalGroup(
+      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+      .addGroup(jPanel1Layout.createSequentialGroup()
+        .addContainerGap(65, Short.MAX_VALUE)
+        .addComponent(BtnConnect)
+        .addContainerGap(76, Short.MAX_VALUE))
+    );
+    jPanel1Layout.setVerticalGroup(
+      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+      .addGroup(jPanel1Layout.createSequentialGroup()
+        .addContainerGap()
+        .addComponent(BtnConnect)
+        .addContainerGap(57, Short.MAX_VALUE))
+    );
+
+    dialogChooseMode.getContentPane().add(jPanel1);
+
+    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
+    setMinimumSize(new java.awt.Dimension(568, 548));
+    addWindowListener(new java.awt.event.WindowAdapter()
+    {
+      public void windowOpened(java.awt.event.WindowEvent evt)
+      {
+        formWindowOpened(evt);
+      }
+    });
+
+    tfNachricht.setToolTipText("");
+    tfNachricht.addMouseListener(new java.awt.event.MouseAdapter()
+    {
+      public void mouseClicked(java.awt.event.MouseEvent evt)
+      {
+        tfNachrichtMouseClicked(evt);
+      }
+    });
+    tfNachricht.addActionListener(new java.awt.event.ActionListener()
+    {
+      public void actionPerformed(java.awt.event.ActionEvent evt)
+      {
+        tfNachrichtActionPerformed(evt);
+      }
+    });
+    getContentPane().add(tfNachricht, java.awt.BorderLayout.PAGE_END);
+
+    jScrollPane2.setPreferredSize(new java.awt.Dimension(238, 150));
+
+    txtChat.setColumns(20);
+    txtChat.setRows(5);
+    txtChat.setText("Chat:");
+    jScrollPane2.setViewportView(txtChat);
+
+    getContentPane().add(jScrollPane2, java.awt.BorderLayout.CENTER);
+
+    pack();
+  }// </editor-fold>//GEN-END:initComponents
+
+  private void BtnClientActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_BtnClientActionPerformed
+  {//GEN-HEADEREND:event_BtnClientActionPerformed
+    // TODO add your handling code here:
+  }//GEN-LAST:event_BtnClientActionPerformed
+
+  private void BtnServerActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_BtnServerActionPerformed
+  {//GEN-HEADEREND:event_BtnServerActionPerformed
+    // TODO add your handling code here:
+  }//GEN-LAST:event_BtnServerActionPerformed
+
+  private void tfNachrichtActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_tfNachrichtActionPerformed
+  {//GEN-HEADEREND:event_tfNachrichtActionPerformed
+    // TODO add your handling code here:
+  }//GEN-LAST:event_tfNachrichtActionPerformed
+
+  private void formWindowOpened(java.awt.event.WindowEvent evt)//GEN-FIRST:event_formWindowOpened
+  {//GEN-HEADEREND:event_formWindowOpened
+    dialogChooseMode.show(); 
+  }//GEN-LAST:event_formWindowOpened
+
+  private void tfNachrichtMouseClicked(java.awt.event.MouseEvent evt)//GEN-FIRST:event_tfNachrichtMouseClicked
+  {//GEN-HEADEREND:event_tfNachrichtMouseClicked
+
+  }//GEN-LAST:event_tfNachrichtMouseClicked
+
+  private void BtnConnectActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_BtnConnectActionPerformed
+  {//GEN-HEADEREND:event_BtnConnectActionPerformed
+    // TODO add your handling code here:
+  }//GEN-LAST:event_BtnConnectActionPerformed
+
+  /**
+   * @param args the command line arguments
+   */
+  public static void main(String args[])
+  {
+    /* Set the Nimbus look and feel */
+    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
+    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
+         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
+     */
+    try
+    {
+      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels())
+      {
+        if ("Nimbus".equals(info.getName()))
+        {
+          javax.swing.UIManager.setLookAndFeel(info.getClassName());
+          break;
+        }
+      }
+    }
+    catch (ClassNotFoundException ex)
+    {
+      java.util.logging.Logger.getLogger(ChatView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (InstantiationException ex)
+    {
+      java.util.logging.Logger.getLogger(ChatView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (IllegalAccessException ex)
+    {
+      java.util.logging.Logger.getLogger(ChatView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    catch (javax.swing.UnsupportedLookAndFeelException ex)
+    {
+      java.util.logging.Logger.getLogger(ChatView.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    //</editor-fold>
+
+    /* Create and display the form */
+    java.awt.EventQueue.invokeLater(new Runnable()
+    {
+      public void run()
+      {
+        new ChatView().setVisible(true);
+      }
+    });
+  }
+
+  // Variables declaration - do not modify//GEN-BEGIN:variables
+  private javax.swing.JRadioButton BtnClient;
+  private javax.swing.JButton BtnConnect;
+  private javax.swing.ButtonGroup BtnGrpMode;
+  private javax.swing.JRadioButton BtnServer;
+  private javax.swing.JDialog dialogChooseMode;
+  private javax.swing.JPanel jPanel1;
+  private javax.swing.JScrollPane jScrollPane2;
+  private javax.swing.JLabel lblMode;
+  private javax.swing.JTextField tfNachricht;
+  private javax.swing.JTextArea txtChat;
+  // End of variables declaration//GEN-END:variables
+
+  /**
+   * @return the BtnClient
+   */
+  public javax.swing.JRadioButton getBtnClient()
+  {
+    return BtnClient;
+  }
+
+  /**
+   * @return the BtnConnect
+   */
+  public javax.swing.JButton getBtnConnect()
+  {
+    return BtnConnect;
+  }
+
+  /**
+   * @return the BtnGrpMode
+   */
+  public javax.swing.ButtonGroup getBtnGrpMode()
+  {
+    return BtnGrpMode;
+  }
+
+  /**
+   * @return the BtnServer
+   */
+  public javax.swing.JRadioButton getBtnServer()
+  {
+    return BtnServer;
+  }
+
+  /**
+   * @return the jDialog1
+   */
+  public javax.swing.JDialog getjDialog1()
+  {
+    return dialogChooseMode;
+  }
+
+  /**
+   * @return the tfNachricht
+   */
+  public javax.swing.JTextField getTfNachricht()
+  {
+    return tfNachricht;
+  }
+
+  /**
+   * @return the txtChat
+   */
+  public javax.swing.JTextArea getTxtChat()
+  {
+    return txtChat;
+  }
+}

src/config.properties

+log.level=INFO
+
+log.directory=../Aufgabe7_bandit
+log.filename=ohmLog
+
+# Beispiel f\u00fcr verschiedene Level f\u00fcr unterschiedliche Pakete
+# log.level.bandit.Zahlengenerator=FINE
+# log.level.bandit.Model.Wuerfel=WARNING