diff --git a/11/Aufgabenstellung Praktikum 11.pdf b/11/Aufgabenstellung Praktikum 11.pdf
new file mode 100644
index 0000000..07d94bb
Binary files /dev/null and b/11/Aufgabenstellung Praktikum 11.pdf differ
diff --git a/11/build.gradle b/11/build.gradle
new file mode 100644
index 0000000..11aaf39
--- /dev/null
+++ b/11/build.gradle
@@ -0,0 +1,41 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java project to get you started.
+ * For more details take a look at the Java Quickstart chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/6.3/userguide/tutorial_java_projects.html
+ */
+
+plugins {
+    // Apply the java plugin to add support for Java
+    id 'java'
+
+    // Apply the application plugin to add support for building a CLI application.
+    id 'application'
+}
+
+repositories {
+    // Use jcenter for resolving dependencies.
+    // You can declare any Maven/Ivy/file repository here.
+    jcenter()
+}
+
+dependencies {
+    // This dependency is used by the application.
+    implementation 'com.google.guava:guava:28.2-jre'
+    implementation 'junit:junit:4.12'
+
+    // Use JUnit test framework
+    testImplementation 'junit:junit:4.12'
+}
+
+application {
+    // Define the main class for the application.
+    mainClassName = 'ch.zhaw.ads.ExBox'
+}
+
+test {
+    testLogging {
+        events "passed", "skipped", "failed", "standardOut", "standardError"
+    }
+}
diff --git a/11/gradle/wrapper/gradle-wrapper.jar b/11/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..490fda8
Binary files /dev/null and b/11/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/11/gradle/wrapper/gradle-wrapper.properties b/11/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..a4b4429
--- /dev/null
+++ b/11/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/11/gradlew b/11/gradlew
new file mode 100755
index 0000000..2fe81a7
--- /dev/null
+++ b/11/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/11/gradlew.bat b/11/gradlew.bat
new file mode 100644
index 0000000..62bd9b9
--- /dev/null
+++ b/11/gradlew.bat
@@ -0,0 +1,103 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/11/settings.gradle b/11/settings.gradle
new file mode 100644
index 0000000..35c664f
--- /dev/null
+++ b/11/settings.gradle
@@ -0,0 +1,10 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ *
+ * Detailed information about configuring a multi-project build in Gradle can be found
+ * in the user manual at https://docs.gradle.org/6.3/userguide/multi_project_builds.html
+ */
+
+rootProject.name = 'praktikum01'
diff --git a/11/src/main/java/ch/zhaw/ads/AnyServer.java b/11/src/main/java/ch/zhaw/ads/AnyServer.java
new file mode 100644
index 0000000..e8dfb07
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/AnyServer.java
@@ -0,0 +1,13 @@
+package ch.zhaw.ads;
+
+public class AnyServer implements CommandExecutor {
+
+    @Override
+    public String execute(String command) {
+        StringBuffer result = new StringBuffer(100);
+        result.append("Die Eingabe war \"");
+        result.append(command);
+        result.append("\"\n");
+        return result.toString();
+    }
+}
diff --git a/11/src/main/java/ch/zhaw/ads/CommandExecutor.java b/11/src/main/java/ch/zhaw/ads/CommandExecutor.java
new file mode 100644
index 0000000..57605f0
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/CommandExecutor.java
@@ -0,0 +1,21 @@
+/**
+ * CommandExecutor -- Praktikum Experimentierkasten -- SW3 Dieses Interface muss
+ * von jedem Server implementiert werden.
+ *
+ * @author E. Mumprecht
+ * @version 1.0 -- Geruest fuer irgendeinen Server
+ * @version 1.1 -- K. Rege Fehlerueckgabe hinzugefuegt
+ */
+package ch.zhaw.ads;
+
+public interface CommandExecutor {
+
+    /**
+     * execute -- nimmt eine Kommandozeile, tut irgendetwas gescheites, und
+     * berichtet das Resultat.
+     *
+     * @param command Kommandozeile
+     * @return Resultat, ueblicherweise eine oder mehrere Zeilen.
+     */
+	 String execute(String command) throws Exception;
+}//interface CommandExecutor
\ No newline at end of file
diff --git a/11/src/main/java/ch/zhaw/ads/ExBox.java b/11/src/main/java/ch/zhaw/ads/ExBox.java
new file mode 100644
index 0000000..5fb3f64
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/ExBox.java
@@ -0,0 +1,18 @@
+/**
+ * @author K. Rege
+ * @version 1.0 -- Experimentierkasten
+ */
+package ch.zhaw.ads;
+
+import java.awt.*;
+import java.io.*;
+import java.awt.event.*;
+
+public class ExBox {
+
+    public static void main(String[] args) throws Exception {
+        ExBoxFrame f = new ExBoxFrame();
+        f.setLocationRelativeTo(null);
+        f.setVisible(true);
+    }
+}
diff --git a/11/src/main/java/ch/zhaw/ads/ExBoxFrame.java b/11/src/main/java/ch/zhaw/ads/ExBoxFrame.java
new file mode 100644
index 0000000..4d83da9
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/ExBoxFrame.java
@@ -0,0 +1,314 @@
+/**
+ * @(#)ExBoxFrame.java
+ *
+ * JFC ExBox application
+ *
+ * @author K.Rege
+ * @version	1.00 2014/2/3
+ * @version	1.01 2016/8/2
+ * @version	2.00 2017/8/30 Test
+ * @version	2.01 2018/2/5 AutoScale
+ * @version	2d.02 2018/2/5 Reconnect (inspired by S. Kunz)
+ */
+
+package ch.zhaw.ads;
+
+
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+import java.io.*;
+import java.util.*;
+
+import org.junit.runner.JUnitCore;
+import org.junit.runner.Result;
+import org.junit.runner.notification.Failure;
+import org.junit.runner.notification.RunListener;
+import org.junit.runner.Description;
+
+
+public class ExBoxFrame extends JFrame implements ActionListener, ItemListener {
+	private static double SCALE = 1;
+	private JMenuItem connect, open, test, textView, graphicView;
+	private JButton enter;
+	private JTextField arguments;
+	private JCheckBox reconnect;
+	private JComboBox history;
+	private JTextArea output;
+	private JScrollPane scrollPane;
+	private CommandExecutor command;
+	private boolean graphicOn;
+	private GraphicPanel graphic;
+	private String lastServer;
+
+	public static void setFontSize(int size) {
+		Set<Object> keySet = UIManager.getLookAndFeelDefaults().keySet();
+		Object[] keys = keySet.toArray(new Object[keySet.size()]);
+		for (Object key : keys) {
+			if (key != null && key.toString().toLowerCase().contains("font")) {
+				Font font = UIManager.getDefaults().getFont(key);
+				if (font != null) {
+					font = font.deriveFont((float) size);
+					UIManager.put(key, font);
+				}
+			}
+		}
+	}
+
+	private void initMenu() {
+		JMenuBar menuBar = new JMenuBar();
+		JMenu menuFile = new JMenu();
+		JMenuItem menuFileExit = new JMenuItem();
+		menuFile.setText("File");
+		menuFileExit.setText("Exit");
+
+		// Add action listener.for the menu	button
+		menuFileExit.addActionListener(new	ActionListener() {
+			public void	actionPerformed(ActionEvent	e) {
+				ExBoxFrame.this.windowClosed();
+			}
+		});
+
+		menuFile.add(menuFileExit);
+		menuBar.add(menuFile);
+
+		JMenu menuServer = new JMenu("Server");
+		menuBar.add(menuServer);
+		connect = new JMenuItem("Connect");
+		connect.addActionListener(this);
+		menuServer.add(connect);
+		test = new JMenuItem("Test");
+		test.addActionListener(this);
+		menuServer.add(test);
+
+		JMenu menuView = new JMenu("View");
+		menuBar.add(menuView);
+		textView = new JMenuItem("Text");
+		textView.addActionListener(this);
+		menuView.add(textView);
+		graphicView = new JMenuItem("Graphic");
+		graphicView.addActionListener(this);
+		menuView.add(graphicView);
+
+		open = new JMenuItem("Open...");
+		open.addActionListener(this);
+		menuFile.insert(open, 0);
+		setJMenuBar(menuBar);
+	}
+
+	private void initComponents() {
+		setLayout(new BorderLayout());
+		output = new JTextArea();
+		scrollPane = new JScrollPane(output);
+		add(BorderLayout.CENTER, scrollPane);
+
+		Panel panel = new Panel(new BorderLayout());
+		arguments = new JTextField();
+		arguments.addActionListener(this);
+		panel.add(BorderLayout.CENTER, arguments);
+		enter = new JButton("enter");
+		enter.addActionListener(this);
+		panel.add(BorderLayout.EAST, enter);
+		reconnect = new JCheckBox("reconnect",true);
+		panel.add(BorderLayout.WEST,reconnect);
+		history = new JComboBox();
+		history.addItemListener(this);
+		panel.add(BorderLayout.SOUTH, history);
+		add(BorderLayout.SOUTH, panel);
+	}
+
+	/**
+	 * get default path for file open dialog
+	 */
+	String getPathCompiled() {
+		String pathtocompiled = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
+		pathtocompiled = pathtocompiled.replace("%20", " ").replace("/",
+				File.separator);
+		pathtocompiled += getClass().getPackage().getName().replace(".",
+				File.separator);
+		if (System.getProperty("os.name").toLowerCase().indexOf("win") >= 0) {
+			pathtocompiled = pathtocompiled.substring(1);
+		}
+		return pathtocompiled;
+	}
+
+	/**
+	 * The constructor
+	 */
+	public ExBoxFrame() throws Exception {
+		try {
+			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+		} catch (Exception ex) {
+			ex.printStackTrace();
+		}
+		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+		if (screenSize.getWidth() > 1920) {
+			SCALE = 2;
+		}
+		setFontSize((int) (11 * SCALE));
+		setSize(new	Dimension((int) (400 * SCALE), (int) (400 * SCALE)));
+		setTitle("ExBox");
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		initMenu();
+		initComponents();
+	}
+
+	private void error(String s) {
+		output.append("\nERROR:" + s + "\n");
+	}
+
+	private void interpret(String args) throws Exception {
+		if (reconnect.isSelected() && lastServer != null) {
+			command = ServerFactory.createServer(lastServer);
+		}
+		if (!arguments.getText().equals(history.getItemAt(0))
+				&& !arguments.getText().equals(history.getSelectedItem())) {
+			history.insertItemAt(arguments.getText(), 0);
+		}
+		if (command == null) {
+			error("no Server connected");
+		} else {
+			String res = command.execute(args);
+			if (graphicOn) {
+				graphic.setFigure(res);
+			} else {
+				output.append(res);
+			}
+		}
+	}
+
+	private void setGraphicView() {
+		if (graphicOn) {
+			return;
+		}
+		remove(scrollPane);
+		graphic = new GraphicPanel();
+		output.removeNotify();
+		add(BorderLayout.CENTER, graphic);
+		graphicOn = true;
+		validate();
+		repaint();
+	}
+
+	private void setTextView() {
+		if (!graphicOn) {
+			return;
+		}
+		remove(graphic);
+		add(BorderLayout.CENTER, scrollPane);
+		graphicOn = false;
+		validate();
+		repaint();
+	}
+
+	private String openFileDialog(String startDirectory, String pattern) {
+		FileDialog	fd = new FileDialog(this, "Open");
+		if (pattern != null) {
+			fd.setFile(pattern);
+		}
+		if (startDirectory != null) {
+			fd.setDirectory(startDirectory);
+		}
+		fd.setVisible(true);
+		return  fd.getDirectory() + fd.getFile();
+	}
+
+	private void testCommand() throws Exception {
+		final java.util.List<String> failed = new LinkedList<String>();
+		final java.util.List<String> finished = new LinkedList<String>();
+
+		JUnitCore runner = new JUnitCore();
+
+		String name = openFileDialog(getPathCompiled(), "*Test.class");
+		runner.addListener(new RunListener() {
+			@Override
+			public void testFinished(Description description) throws Exception {
+				finished.add(description.getDisplayName());
+			}
+
+			@Override
+			public void testFailure(Failure failure) throws Exception {
+				failed.add(failure.getDescription().getDisplayName());
+			}
+		});
+		Class testClass = ServerFactory.loadClass(name);
+		Result result = runner.run(testClass);
+
+		for (String test : finished) {
+			if (!failed.contains(test)) {
+				output.append(test + ": OK\n");
+			}
+		}
+		for (Failure failure : result.getFailures()) {
+			output.append(failure.toString() + " ERROR\n");
+		}
+		output.append(
+				"TESTS PASSED: "
+						+ (result.wasSuccessful()
+								? "OK \u263a"
+								: result.getFailures().size() + " ERRORS")
+								+ "\n");
+	}
+
+	private void connectCommand() throws Exception {
+		String name = openFileDialog(getPathCompiled(), "*Server.class");
+		command = ServerFactory.createServer(name);
+		lastServer = name;
+		String fullClassName = command.getClass().getName();
+		String simpleClassName = fullClassName.substring(
+				fullClassName.lastIndexOf('.') + 1);
+		setTitle("ExBox connected to " + simpleClassName);
+
+	}
+
+	private void openFile()  throws Exception {
+		String name = openFileDialog(null, null);
+
+		BufferedReader br = new BufferedReader(
+				new InputStreamReader(new FileInputStream(name), "ISO-8859-1"));
+		StringBuffer b = new StringBuffer();
+		String line;
+		while ((line = br.readLine()) != null) {
+			b.append(line);
+			b.append('\n');
+		}
+		interpret(b.toString());
+	}
+
+	public void	itemStateChanged(ItemEvent e) {
+		try {
+			arguments.setText((String) e.getItem());
+			interpret(arguments.getText());
+		} catch (Throwable ex) {
+			error(ex.toString());
+		}
+	}
+
+	public void	actionPerformed(ActionEvent	e) {
+		try {
+			if ((e.getSource() == arguments) || (e.getSource() == enter)) {
+				interpret(arguments.getText());
+			} else if (e.getSource() == connect) {
+				connectCommand();
+			} else if (e.getSource() == test) {
+				testCommand();
+			} else if (e.getSource() == open) {
+				openFile();
+			} else if (e.getSource() == textView) {
+				setTextView();
+			} else if (e.getSource() == graphicView) {
+				setGraphicView();
+			}
+		} catch (Throwable ex) {
+			ex.printStackTrace();
+			error(ex.toString());
+		}
+	}
+
+	/**
+	 * Shutdown	procedure when run as an application.
+	 */
+	protected void windowClosed() {
+		System.exit(0);
+	}
+}
diff --git a/11/src/main/java/ch/zhaw/ads/GraphicPanel.java b/11/src/main/java/ch/zhaw/ads/GraphicPanel.java
new file mode 100644
index 0000000..e5cf666
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/GraphicPanel.java
@@ -0,0 +1,88 @@
+package ch.zhaw.ads;
+
+
+import javax.swing.*;
+import java.awt.event.*;
+import java.awt.*;
+import java.util.*;
+
+
+public class GraphicPanel extends JPanel {
+
+	String figure;
+
+	public void setFigure(String figure) {
+		this.figure = figure;
+		paint(getGraphics());
+	}
+
+	private void drawRect(Graphics g, double x, double y, double width, double height, String style) {
+		int w = getWidth();
+		int h = getHeight();
+		int ix0 = (int) (w * x);
+		int iy0 = (int) (h * y);
+		int ix1 = (int) (w * (x + width));
+		int iy1 = (int) (h * (y + height));
+		if (style.equals("draw")) {
+			g.drawRect(ix0, h - iy1, ix1 - ix0, iy1 - iy0);
+		} else {
+			g.fillRect(ix0, h - iy1, ix1 - ix0, iy1 - iy0);
+		}
+	}
+
+	private void drawFigure(Graphics g) {
+		if (figure != null) {
+			int w = getWidth();
+			int h = getHeight();
+			g.setColor(Color.black);
+			StringTokenizer tok = new StringTokenizer(figure, " <>=/,\"\n");
+			while (tok.hasMoreTokens()) {
+				String fig = tok.nextToken();
+				if (fig.equals("line")) {
+					tok.nextToken();
+					double x1 = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double y1 = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double x2 = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double y2 = Double.parseDouble(tok.nextToken());
+					g.drawLine((int) (x1 * w), h - (int) (y1 * h),
+							(int) (x2 * w), h - (int) (y2 * h));
+				} else if (fig.equals("rect")) {
+					tok.nextToken();
+					double x = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double y = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double width = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					double height = Double.parseDouble(tok.nextToken());
+					tok.nextToken();
+					String style = tok.nextToken();
+					drawRect(g, x, y, width, height, style);
+				} else if (fig.equals("color")) {
+					tok.nextToken();
+					int red = Integer.parseInt(tok.nextToken());
+					tok.nextToken();
+					int green = Integer.parseInt(tok.nextToken());
+					tok.nextToken();
+					int blue = Integer.parseInt(tok.nextToken());
+					g.setColor(new Color(red, green, blue));
+				}
+			}
+		}
+	}
+
+	private void clear(Graphics g) {
+		int w = getWidth();
+		int h = getHeight();
+		g.setColor(new Color(240, 240, 240));
+		g.fillRect(0, 0, w, h);
+	}
+
+	public void paint(Graphics g) {
+		clear(g);
+		drawFigure(g);
+	}
+}
\ No newline at end of file
diff --git a/11/src/main/java/ch/zhaw/ads/HttpsClient.java b/11/src/main/java/ch/zhaw/ads/HttpsClient.java
new file mode 100644
index 0000000..29db864
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/HttpsClient.java
@@ -0,0 +1,98 @@
+package ch.zhaw.ads;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.security.cert.Certificate;
+import java.io.*;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLPeerUnverifiedException;
+
+
+public class HttpsClient {
+
+    public static void main(String[] args) {
+        new HttpsClient().testIt();
+    }
+
+    private void testIt() {
+
+        String https_url = "https://www.google.com/";
+        URL url;
+        try {
+
+            url = new URL(https_url);
+            HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
+
+            // dumpl all cert info
+            print_https_cert(con);
+
+            // dump all the content
+            print_content(con);
+
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    private void print_https_cert(HttpsURLConnection con) {
+
+        if (con != null) {
+
+            try {
+
+                System.out.println("Response Code : " + con.getResponseCode());
+                System.out.println("Cipher Suite : " + con.getCipherSuite());
+                System.out.println("\n");
+
+                Certificate[] certs = con.getServerCertificates();
+                for (Certificate cert : certs) {
+                    System.out.println("Cert Type : " + cert.getType());
+                    System.out.println("Cert Hash Code : " + cert.hashCode());
+                    System.out.println(
+                            "Cert Public Key Algorithm : "
+                                    + cert.getPublicKey().getAlgorithm());
+                    System.out.println(
+                            "Cert Public Key Format : "
+                                    + cert.getPublicKey().getFormat());
+                    System.out.println("\n");
+                }
+
+            } catch (SSLPeerUnverifiedException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+        }
+
+    }
+
+    private void print_content(HttpsURLConnection con) {
+        if (con != null) {
+
+            try {
+
+                System.out.println("****** Content of the URL ********");
+                BufferedReader br = new BufferedReader(
+                        new InputStreamReader(con.getInputStream()));
+
+                String input;
+
+                while ((input = br.readLine()) != null) {
+                    System.out.println(input);
+                }
+                br.close();
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+        }
+
+    }
+
+}
diff --git a/11/src/main/java/ch/zhaw/ads/ServerFactory.java b/11/src/main/java/ch/zhaw/ads/ServerFactory.java
new file mode 100644
index 0000000..f6acba6
--- /dev/null
+++ b/11/src/main/java/ch/zhaw/ads/ServerFactory.java
@@ -0,0 +1,68 @@
+/**
+ * ServerFactory -- Praktikum Experimentierkasten --
+ *
+ * @author K. Rege
+ * @version 1.0 -- Factory zur Erstellung von Server Objekten
+ * @version 2.0 -- Dynamisches Nachladen
+ */
+package ch.zhaw.ads;
+
+import java.io.*;
+
+/* Classloader that handles file path of class
+ */
+class MyClassLoader extends ClassLoader {
+	private String path;
+
+	MyClassLoader(ClassLoader parent) {
+		super(parent);
+	}
+
+	private byte[] getBytes(String name) {
+		try {
+			RandomAccessFile file = new RandomAccessFile(name, "r");
+			byte data[] = new byte[(int) file.length()];
+			file.readFully(data);
+			file.close();
+			return data;
+		} catch (IOException e) {}
+		return null;
+	}
+
+    /**
+     * @name filename of class
+     */
+	public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+	    // System.out.println("load:" + name + " " + resolve);
+		Class<?> clazz;
+		byte[] classData = getBytes(name);
+		if (classData != null) {
+			clazz = defineClass(classData, 0, classData.length);
+			path = name.substring(0,
+					name.length() - clazz.getName().length() - ".class".length());
+			return clazz;
+		}
+		if (!resolve) {
+			classData = getBytes(path + name.replace(".", File.separator) + ".class");
+			if (classData != null) {
+				return defineClass(classData, 0, classData.length);
+			}
+		}
+		return findSystemClass(name);
+	}
+}
+
+
+public class ServerFactory {
+
+	public static Class<?> loadClass(String name)  throws Exception {
+		MyClassLoader myClassLoader = new MyClassLoader(
+				MyClassLoader.class.getClassLoader());
+		Class<?> clazz = myClassLoader.loadClass(name, true);
+		return clazz;
+	}
+
+	public static CommandExecutor createServer(String name) throws Exception {
+		return (CommandExecutor) loadClass(name).newInstance();
+	}
+}