Hallo

src/Bot/Bot.java

@@ -0,0 +1,87 @@
+package Bot;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+import java.net.InetSocketAddress;
+
+public abstract class Bot {
+
+    // Ein Bot ist ein Programm, das sich mit einem Server verbindet und
+    // mit diesem kommuniziert. Der Server sendet dem Bot eine Zeichenkette,
+    // die das Spielfeld repräsentiert. Der Bot sendet dem Server ein Zeichen,
+    // das die nächste Bewegung des Bots repräsentiert.
+
+
+    private final String host;  // Hostname oder IP-Adresse des Servers
+    private final int port;     // Port des Servers
+
+    protected Bot(String[] args) {
+        host = args.length > 0 ? args[0] : "localhost";
+        port = args.length > 1 ? Integer.parseInt(args[1]) : 63187;
+    }
+
+    // Diese Methode stellt die Verbindung zum Server her und startet die
+    // Kommunikation mit dem Server. Die Methode wird von der main-Methode
+    // aufgerufen.
+    protected void run() {
+        try (Socket socket = new Socket()) {
+            socket.connect(new InetSocketAddress(host, port));
+            OutputStream out = socket.getOutputStream();
+            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+            View view = new View();
+            while (true) {
+                view.read(in);
+                view.print();
+                try {
+                    char ch = nextMove(view);
+                    out.write(ch);
+                }
+                catch (Exception e) { break; }
+            }
+            socket.close();
+        } catch (IOException e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+    }
+
+    // Diese Methode ermittelt den nächsten Zug des Bots. Sie wird von der
+    // run-Methode aufgerufen, nachdem der Server das Spielfeld gesendet hat.
+    // Subklassen müssen diese Methode implementieren.
+    abstract protected char nextMove(View view) throws Exception;
+
+    // Diese Klasse repräsentiert das Spielfeld. Sie wird von der run-Methode
+    // verwendet, um das Spielfeld zu lesen und auszugeben.
+    // Subklassen können diese Klasse verwenden, um das Spielfeld zu analysieren.
+    public static class View {
+        protected String data;
+        protected int width;
+
+        // Diese Methode liest das Spielfeld vom Server.
+        private void read(BufferedReader in) throws IOException {
+            StringBuilder sb = new StringBuilder();
+            data = in.readLine();
+            if (data == null) {
+                return;
+            }
+            sb.append(data);
+            width = data.length();
+            for (int i = 1; i < width; ++i) {
+                sb.append(in.readLine());
+            }
+            data = sb.toString();
+        }
+
+        // Diese Methode gibt das Spielfeld aus.
+        protected void print() {
+            if (data == null || width < 1) {
+                return;
+            }
+            for (int i = 0, len = data.length(); i < len; i += width) {
+                System.out.println(data.substring(i, i + width));
+            }
+        }
+    }
+}

src/Bot/EscapeBot.java

@@ -0,0 +1,90 @@
+package Bot;
+import java.io.IOException;
+
+public class EscapeBot extends Bot {
+
+    private boolean rocketFound = false;
+    private int counter=0;
+
+
+    public EscapeBot(String[] args) {
+        super(args);
+    }
+
+    @Override
+    protected char nextMove(View view) throws IOException {
+        counter++;
+        System.out.println(counter);
+        if (view.data.contains("o")) {
+            System.out.println("rocket found");
+
+           return moveToRocket(view);
+        }else {
+            return findRocket();
+        }
+
+    }
+
+
+        // Wenn die Rakete nicht gefunden wurde oder bereits gefunden wurde,
+        // mache einen zufälligen Schritt.
+
+
+
+    private char findRocket(){
+        if(counter==1||counter==6||counter==11||counter==21||counter==31||counter==46||counter==61||counter==81||counter==101||counter==126||counter==151||counter==181||counter==211||counter==246||counter==271){
+            System.out.println("ich dreh mich");
+
+            return '>';
+
+        }
+System.out.println("ich geh gerade aus");
+        return '^';
+    }
+    private char moveToRocket(View view) {
+        int zeroIndex = view.data.indexOf("o");
+
+        // Berechne die x- und y-Koordinaten der "0" im Sichtfeld
+        int zeroX = zeroIndex % view.width;
+        int zeroY = zeroIndex / view.width;
+
+        // Berechne die x- und y-Koordinaten der aktuellen Position des Bots
+        int botX = view.width / 2;
+        int botY = view.width / 2;
+        System.out.println(zeroX);
+        System.out.println(zeroY);
+        System.out.println(botX);
+        System.out.println(botY);
+
+       if(zeroY<botY){
+           System.out.println("ich suche das ziehl");
+           return '^';
+
+       }else if(zeroY>botY){
+           return'v';
+       }else if(zeroY==botY){
+           if(zeroX<botX){
+               System.out.println("suche:Ich dreh mich nach links ");
+               return '<';
+           }else {
+               System.out.println("ziel:ich dreh mich nach rechts");
+               return '>';
+           }
+       }else
+           return 'q';
+
+
+    }
+
+
+
+
+    public static void main(String[] args) {
+        EscapeBot escapeBot = new EscapeBot(args);
+        escapeBot.run();
+    }
+}
+
+
+
+

src/Bot/ManualBot.java

@@ -0,0 +1,46 @@
+package Bot;
+
+import java.io.IOException;
+import java.util.Scanner;
+
+
+public class ManualBot extends Bot {
+
+    public ManualBot(String[] args) {
+        super(args);
+    }
+
+    @Override
+    protected char nextMove(View view) throws IOException {
+        System.out.println(" (w: Forward, s: Backward, a: Left, d: Right, q: Quit): ");
+        Scanner scan= new Scanner(System.in);
+        //BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+       // String input = reader.readLine().trim();
+
+        String command =   scan.nextLine();
+
+        switch (command) {
+            case "w":
+                return '^';
+            case "s":
+                return 'v';
+            case "a":
+                return '<';
+            case "d":
+                return '>';
+            case "q":
+                System.out.println("Connection terminated by user.");
+                throw new IOException("Connection terminated by user.");
+            default:
+                System.out.println("Invalid command. Try again.");
+
+        }
+        return 'q';
+    }
+
+
+    public static void main(String[] args) {
+        ManualBot manualBot = new ManualBot(args);
+        manualBot.run();
+    }
+}

src/Bot/Rumblebot.java

@@ -0,0 +1,46 @@
+package Bot;
+
+import java.io.IOException;
+import java.util.Scanner;
+
+
+public class Rumblebot extends Bot {
+
+    public Rumblebot(String[] args) {
+        super(args);
+    }
+
+    @Override
+    protected char nextMove(View view) throws IOException {
+        System.out.println(" (w: Forward, s: Backward, a: Left, d: Right, q: Quit): ");
+        Scanner scan= new Scanner(System.in);
+        //BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+        // String input = reader.readLine().trim();
+
+        String command =   scan.nextLine();
+
+        switch (command) {
+            case "w":
+                return '^';
+            case "s":
+                return 'v';
+            case "a":
+                return '<';
+            case "d":
+                return '>';
+            case "q":
+                System.out.println("Connection terminated by user.");
+                throw new IOException("Connection terminated by user.");
+            default:
+                System.out.println("Invalid command. Try again.");
+
+        }
+        return 'q';
+    }
+
+
+    public static void main(String[] args) {
+        Rumblebot rumblebot = new Rumblebot(args);
+        rumblebot.run();
+    }
+}

src/Bot/SnakeBot.java

@@ -0,0 +1,143 @@
+package Bot;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+
+public class SnakeBot extends Bot {
+
+    public SnakeBot(String[] args) {
+        super(args);
+    }
+
+    int counter=0;
+
+    @Override
+    protected char nextMove(View view) throws IOException {
+        int wagenIndex = view.data.indexOf("*");
+
+        // Berechne die x- und y-Koordinaten der "0" im Sichtfeld
+        int wagenX = wagenIndex % view.width;
+        int wagenY = wagenIndex / view.width;
+        //Berechen die x- und y-Koordinate der @ im Sichtfeld
+
+
+        // Berechne die x- und y-Koordinaten der aktuellen Position des Bots
+        int botX = view.width / 2;
+        int botY = view.width / 2;
+
+        System.out.println("wagen"+wagenX+" ,"+wagenY);
+        System.out.println("bot"+botX+", "+botY);
+    if((wagenY+1)==botY){
+        System.out.println("ich dreh mich ");
+        return '>';
+    }else {
+        return search(view);
+    }
+
+    }
+
+private char search(View view){
+
+
+        if(view.data.contains("@")){
+            return moveToRocket(view);
+        }
+        else {
+            System.out.println("ich laufe");
+            counter++;
+            if(counter>40){
+                counter=0;
+                return '>';
+            }
+            return '^';
+        }
+}
+
+
+    private char moveToRocket(View view) {
+
+        int wagenIndex = view.data.indexOf("*");
+
+        // Berechne die x- und y-Koordinaten der "0" im Sichtfeld
+        int wagenX = wagenIndex % view.width;
+        int wagenY = wagenIndex / view.width;
+
+
+        int botX = view.width / 2;
+        int botY = view.width / 2;
+
+        // Finde alle '@'-Symbole im Sichtfeld
+        List<Integer> targetIndices = new ArrayList<>();
+        for (int i = 0; i < view.data.length(); i++) {
+            if (view.data.charAt(i) == '@') {
+                targetIndices.add(i);
+            }
+        }
+
+        if (targetIndices.isEmpty()) {
+            // Keine Ziele vorhanden, laufe weiter
+            System.out.println("Ich laufe weiter");
+            return '^';
+        }
+
+        // Finde das am nächsten liegende Ziel
+        int nearestTargetIndex = findNearestTarget(botX, botY, targetIndices, view.width);
+
+        // Berechne die x- und y-Koordinaten des nächsten Ziels
+        int targetX = nearestTargetIndex % view.width;
+        int targetY = nearestTargetIndex / view.width;
+
+        // Bewege dich in Richtung des nächsten Ziels
+        if (targetY < botY) {
+            System.out.println("Ich bewege mich nach oben");
+            return '^';
+        } else if (targetY > botY) {
+            if((wagenY+1)==botY){
+                System.out.println("ich dreh mich ");
+                return '>';
+            }else {
+
+
+            System.out.println("Ich bewege mich nach unten");
+            return 'v';}
+        } else {
+            if (targetX < botX) {
+                System.out.println("Ich drehe mich nach links");
+                return '<';
+            } else if (targetX > botX) {
+                System.out.println("Ich drehe mich nach rechts");
+                return '>';
+            }
+        }
+
+        // Default-Rückgabewert, sollte nicht erreicht werden
+        return 'q';
+    }
+
+    private int findNearestTarget(int botX, int botY, List<Integer> targetIndices, int width) {
+        int nearestTargetIndex = -1;
+        int minDistance = Integer.MAX_VALUE;
+
+        for (int targetIndex : targetIndices) {
+            int targetX = targetIndex % width;
+            int targetY = targetIndex / width;
+
+            int distance = Math.abs(targetX - botX) + Math.abs(targetY - botY);
+
+            if (distance < minDistance) {
+                minDistance = distance;
+                nearestTargetIndex = targetIndex;
+            }
+        }
+
+        return nearestTargetIndex;
+    }
+
+    public static void main(String[] args) {
+        SnakeBot snakebot= new SnakeBot(args);
+        snakebot.run();
+    }
+}

src/HelloWorld/ErrorWriter.java

@@ -0,0 +1,8 @@
+package HelloWorld;
+
+public class ErrorWriter implements IHelloWorldWriter {
+    @Override
+    public void writeHelloWorld(){
+        System.err.println("Hello World");
+    }
+}

src/HelloWorld/Executor.java

@@ -0,0 +1,24 @@
+package HelloWorld;
+
+public class Executor{
+
+
+
+    public static void main(String[] args) {
+
+        printwriteHelloWorld(new OutWriter(), new ErrorWriter(), true);
+        printwriteHelloWorld(new OutWriter(), new ErrorWriter(), false);
+    }
+
+    public static void printwriteHelloWorld(IHelloWorldWriter writer1, IHelloWorldWriter writer2, boolean second) {
+
+
+        if(second){
+            writer2.writeHelloWorld();
+        }else {
+            writer1.writeHelloWorld();
+        }
+
+
+    }
+}

src/HelloWorld/IHelloWorldWriter.java

@@ -0,0 +1,9 @@
+package HelloWorld;
+
+
+public interface IHelloWorldWriter {
+
+    void writeHelloWorld();
+}
+
+

src/HelloWorld/OutWriter.java

@@ -0,0 +1,9 @@
+package HelloWorld;
+
+public class OutWriter implements IHelloWorldWriter {
+    @Override
+    public void writeHelloWorld(){
+        System.out.println("Hello Wolrd");
+    }
+
+}

src/Praktikum1/Teilerdurch5.java

@@ -1,4 +1,4 @@
-package Praktikum1;
+package praktikum1;
 
 public class Teilerdurch5 {
 

src/Praktikum1/Zahlenfilter.java

@@ -1,6 +1,5 @@
-package Praktikum1;
+package praktikum1;
 
-import java.util.Scanner;
 
 public class Zahlenfilter {
     public static void main(String[] args) {

src/Praktikum4/Fork.java

@@ -0,0 +1,45 @@
+package Praktikum4;
+
+public class Fork {
+
+    private boolean inUse=false;
+    private final int id;
+
+    public Fork(int id){
+        this.id=id;
+    }
+
+    public int getId(){
+        return id;
+    }
+
+
+    public  boolean take(){
+        try {
+            //kurz warten
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        synchronized (this) {
+            if (!inUse) {
+                inUse=true;
+                return true;
+            } else {
+                //System.out.println("Keine Gabel frei");
+                return false;
+            }
+        }
+    }
+
+    public void put(){
+        synchronized (this) {
+            inUse = false;
+        }
+    }
+
+    public boolean isInUse() {
+        return inUse;
+    }
+}

src/Praktikum4/Philosopher.java

@@ -0,0 +1,59 @@
+package Praktikum4;
+
+import java.util.concurrent.Semaphore;
+
+class Philosopher implements Runnable{
+
+    protected int id;
+    protected final Fork left;
+    protected final Fork right;
+
+    public Philosopher(int id,Fork left,Fork rigth){
+        this.id=id;
+        this.left=left;
+        this.right=rigth;
+    }
+    private void tryToGetFork(Fork fork, String forkType) {
+
+        System.out.println("Philosopher " + id + " is trying to get " + forkType + " fork " + fork.getId());
+        while (!fork.take()) {
+            Thread.yield(); // Busy wait, um die CPU zu entlasten
+        }
+        System.out.println("Philosopher " + id + " got " + forkType + " fork " + fork.getId());
+    }
+
+    @Override
+    public void run() {
+        try {
+            Fork firstFork;
+            Fork secondFork;
+
+            if (left.getId() < right.getId()) {
+                firstFork = left;
+                secondFork = right;
+            } else {
+                firstFork = right;
+                secondFork = left;
+            }
+
+
+            tryToGetFork(firstFork, "first");
+
+
+            tryToGetFork(secondFork, "second");
+            System.out.println("Philosopher " + id + " is eating");
+
+
+            Thread.sleep(2000);
+
+
+            left.put();
+            right.put();
+
+
+            System.out.println("Philosopher " + id + " finished eating");
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/Praktikum4/SorterClient.java

@@ -0,0 +1,58 @@
+package Praktikum4;
+
+import java.io.*;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.Scanner;
+
+public class SorterClient {
+
+    public static void main(String[] args) {
+        SorterClient client = new SorterClient();
+        client.run();
+    }
+
+    private void run() {
+        Scanner scanner = new Scanner(System.in);
+        while (scanner.hasNextLine()) {
+            String line = scanner.nextLine();
+            if (line.isEmpty())
+                break;
+            line = sort(line);
+            System.out.println(line);
+        }
+        scanner.close();
+    }
+
+    private static final String SERVER_ADDRESS = "localhost";
+    private static final int SERVER_PORT = 12345;
+
+    private String sort(String line)
+    {
+
+        InetSocketAddress adress = new InetSocketAddress(SERVER_ADDRESS, SERVER_PORT);
+        try ( Socket socket = new Socket()) {
+            socket.connect(adress);
+            sendLine(socket, line);
+            String answer = receiveLine(socket);
+          return answer;
+        } catch (IOException e) {
+            e.printStackTrace();
+            return "Error: Unable to communicate with the server.";
+        }
+    }
+
+    public static String receiveLine(Socket socket) throws IOException {
+        InputStream in = socket.getInputStream();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+        return reader.readLine();
+    }
+
+    public static void sendLine(Socket socket, String line) throws IOException {
+        OutputStream out = socket.getOutputStream();
+        PrintWriter writer = new PrintWriter(out);
+        writer.println(line);
+        writer.flush();
+    }
+}

src/Praktikum4/SorterServer.java

@@ -0,0 +1,80 @@
+package Praktikum4;
+
+
+import java.io.*;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.HashMap;
+import java.util.Map;
+
+public class SorterServer implements Runnable {
+    public static void main(String[] args) {
+        final int port = 12345;
+        try (ServerSocket socket = new ServerSocket(port)) {
+            while (true) {
+                Socket client = socket.accept();
+                Thread thread = new Thread(new SorterServer(client));
+                thread.start();
+            }
+        } catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+    }
+
+    private Socket socket;
+
+    private SorterServer(Socket socket) {
+        this.socket = socket;
+    }
+
+    @Override
+    public void run() {
+        try {
+            String msg = receiveLine(this.socket);
+            String ausgabe=sortAndCount(msg);
+            sendLine(socket,ausgabe );
+        }
+        catch (Exception e) {};
+    }
+
+
+    public static String receiveLine(Socket socket) throws IOException {
+        InputStream in = socket.getInputStream();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+        return reader.readLine();
+    }
+
+    public static void sendLine(Socket socket, String line) throws IOException {
+        OutputStream out = socket.getOutputStream();
+        PrintWriter writer = new PrintWriter(out);
+        writer.println(line);
+        writer.flush();
+    }
+
+    public static String sortAndCount(String input) {
+
+        Map<Character, Integer> charCountMap = new HashMap<>();
+
+
+        for (char c : input.toCharArray()) {
+            charCountMap.put(c, charCountMap.getOrDefault(c, 0) + 1);
+        }
+
+
+        StringBuilder sortedString = new StringBuilder();
+
+
+        for (char c = 'a'; c <= 'z'; c++) {
+
+            if (charCountMap.containsKey(c)) {
+                int count = charCountMap.get(c);
+                for (int i = 0; i < count; i++) {
+                    sortedString.append(c);
+                }
+            }
+        }
+
+        // Rückgabe der sortierten Zeichenkette
+        return sortedString.toString();
+    }
+}

src/Praktikum4/Table.java

@@ -0,0 +1,11 @@
+package Praktikum4;
+
+public class Table {
+    public static void main(String[] args) {
+        Fork[] forks = { new Fork(0), new Fork(1), new Fork(2),
+                new Fork(3), new Fork(4)}; Philosopher[] philosophers = {
+                new Philosopher(0, forks[0], forks[1]), new Philosopher(1, forks[1], forks[2]), new Philosopher(2, forks[2], forks[3]), new Philosopher(3, forks[3], forks[4]), new Philosopher(4, forks[4], forks[0])
+        };
+        for (Philosopher philosopher : philosophers) { Thread t = new Thread(philosopher); t.start();
+        } }
+}

src/test.java

@@ -1,2 +0,0 @@
-public class test {
-}

test/HelloWorld/ExecutorTest.java

@@ -0,0 +1,33 @@
+/*package HelloWorld;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+
+class ExecutorTest {
+
+    @Test
+    void printwriteHelloWorld() {
+
+
+        //Mock-Objekte werden erzeugt
+        IHelloWorldWriter outMock =mock(OutWriter.class);
+        IHelloWorldWriter errMock =mock(OutWriter.class);
+
+        Executor.printwriteHelloWorld(outMock,errMock,true);
+
+        verify(outMock,times(1)).writeHelloWorld();
+        verify(errMock,times(0)).writeHelloWorld();
+
+    }
+}
+
+
+//writeHelloWorld wird einmal für outMock aufgerufen und keinmal für errMock, weil second auf false gesetzt wurde
+
+// Mock -Objekte ermöglichen, Verhalten von Abhängigkeiten zu testen. Bei unserem Fall können wir nun die Methode aufrufen ohen das tatsächlich was geprintet wurde
+
+// Bei fehlerhaftem Verhalten würde der Test fehlschlagen -- Die Methode hat also nicht die erwarteten Aufrufe
+
+*/

test/Praktikum4/ForkTest.java

@@ -0,0 +1,33 @@
+package Praktikum4;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ForkTest {
+
+    @Test
+    void getId() {
+        Fork fork = new Fork(1);
+        assertEquals(1, fork.getId());
+    }
+
+    @Test
+    void take() {
+        Fork fork = new Fork(2);
+        assertTrue(fork.take());// sollte nicht in Gebrauch sein
+
+
+
+    }
+
+
+    @Test
+    void put() {
+        Fork fork = new Fork(3);
+        fork.put();
+
+
+
+    }
+}

test/praktikum1/TriangleCheckerTest.java

@@ -0,0 +1,37 @@
+package praktikum1;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TriangleCheckerTest {
+
+    @Test
+    void checkEquilateralTriangle() {
+        //Gleichseitig
+        assertEquals(TriangleChecker.TriangleType.EQUILATERAL,TriangleChecker.checkTriangle(5,5,5));
+    }
+    @Test
+    void checkIsoscelesTriangle(){
+        //Gleichschenklich
+        assertEquals(TriangleChecker.TriangleType.ISOSCELES, TriangleChecker.checkTriangle(5,5,3));
+        assertEquals(TriangleChecker.TriangleType.ISOSCELES, TriangleChecker.checkTriangle(3,5,5));
+        assertEquals(TriangleChecker.TriangleType.ISOSCELES, TriangleChecker.checkTriangle(5,3,5));
+    }
+
+    @Test
+    void checkNormalTrianlge(){
+        assertEquals(TriangleChecker.TriangleType.NORMAL,TriangleChecker.checkTriangle(3,5,7));
+    }
+    @Test
+    void chechNoneTrianlge(){
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(100,10,1));
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(10,100,1));
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(1,10,100));
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(-2,2,3));
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(2,-2,3));
+        assertEquals(TriangleChecker.TriangleType.NONE,TriangleChecker.checkTriangle(2,2,-3));
+
+
+    }
+}

test/praktikum1/ZahlenfilterTest.java

@@ -0,0 +1,32 @@
+package praktikum1;
+
+import com.sun.org.apache.xpath.internal.objects.XNumber;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Test;
+
+class ZahlenfilterTest {
+
+    @org.junit.jupiter.api.Test
+    void istdurch5teilbar() {
+
+assertFalse(Zahlenfilter.istdurch5teilbar(12));
+assertTrue(Zahlenfilter.istdurch5teilbar(10));
+
+    }
+
+    @org.junit.jupiter.api.Test
+    void auf9endet() {
+        assertTrue(Zahlenfilter.auf9endet(89));
+        assertFalse(Zahlenfilter.auf9endet(65));
+    }
+
+    @org.junit.jupiter.api.Test
+    void addiertunddurch3() {
+        assertTrue(Zahlenfilter.addiertunddurch3(9,6));
+
+    }
+}