Inital commit

.gitignore

@@ -0,0 +1 @@
+*/bin/

.vscode/launch.json

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+{
+    "configurations": [
+        {
+            "type": "java",
+            "name": "CodeLens (Launch) - App",
+            "request": "launch",
+            "mainClass": "app.App",
+            "projectName": "de.hhn.ai.prog2.blatt1.exceptions"
+        },
+        {
+            "type": "java",
+            "name": "CodeLens (Launch) - App",
+            "request": "launch",
+            "mainClass": "app.App",
+            "projectName": "de.hhn.ai.prog2.blatt1.mathematikaufgaben"
+        }
+    ]
+}

de.hhn.ai.prog2.blatt1.exceptions/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

de.hhn.ai.prog2.blatt1.exceptions/.project

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<projectDescription>
+  <name>de.hhn.ai.prog2.blatt1.exceptions</name>
+  <comment/>
+  <projects>
+    </projects>
+  <buildSpec>
+    <buildCommand>
+      <name>org.eclipse.jdt.core.javabuilder</name>
+      <arguments>
+            </arguments>
+    </buildCommand>
+  </buildSpec>
+  <natures>
+    <nature>org.eclipse.jdt.core.javanature</nature>
+  </natures>
+</projectDescription>

de.hhn.ai.prog2.blatt1.exceptions/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

de.hhn.ai.prog2.blatt1.exceptions/.vscode/launch.json

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+{
+    "configurations": [
+        {
+            "type": "java",
+            "name": "CodeLens (Launch) - App",
+            "request": "launch",
+            "mainClass": "app.App",
+            "projectName": "de.hhn.ai.prog2.blatt1.exceptions"
+        }
+    ]
+}

de.hhn.ai.prog2.blatt1.exceptions/src/app/App.java

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+package app;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        PersonService.main();
+    }
+}

de.hhn.ai.prog2.blatt1.exceptions/src/app/Hobbies.java

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+package app;
+
+public enum Hobbies {
+    PROGRAMMIEREN, SCHLAFEN, SONSTIGES, HOBBY4, HOBBY5, HOBBY6
+}

de.hhn.ai.prog2.blatt1.exceptions/src/app/NoFreeTimeException.java

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+package app;
+
+/**
+ * NoFreeTimeException
+ */
+public class NoFreeTimeException extends Exception {
+
+    private static final long serialVersionUID = 497594916291844818L;
+
+}

de.hhn.ai.prog2.blatt1.exceptions/src/app/Person.java

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+package app;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Person
+ */
+public class Person {
+    private String preName;
+    private String lastName;
+    private int age;
+    private List<Hobbies> hobbies = new ArrayList<Hobbies>();
+
+    public Person(String preName, String lastName, int age) {
+        setPreName(preName);
+        setLastName(lastName);
+        setAge(age);
+    }
+
+    public String getPreName() {
+        return this.preName;
+    }
+
+    public void setPreName(String preName) {
+        if (preName.isEmpty())
+            throw new IllegalArgumentException();
+        this.preName = preName;
+    }
+
+    public String getLastName() {
+        return this.lastName;
+    }
+
+    public void setLastName(String lastName) {
+        if (lastName.isEmpty())
+            throw new IllegalArgumentException();
+        this.lastName = lastName;
+    }
+
+    public int getAge() {
+        return this.age;
+    }
+
+    public void setAge(int age) {
+        if (age < 0)
+            throw new IllegalArgumentException();
+        this.age = age;
+    }
+
+    public List<Hobbies> getHobbies() {
+        return this.hobbies;
+    }
+
+    public void addHobby(Hobbies hobby) throws NoFreeTimeException {
+        if (!hobbies.contains(hobby))
+            if (hobbies.size() > 4)
+                throw new NoFreeTimeException();
+            else
+                hobbies.add(hobby);
+    }
+
+    @Override
+    public String toString() {
+        return "{" + " preName='" + preName + "'" + ", lastName='" + lastName + "'" + ", age='" + age + "'"
+                + ", hobbies='" + hobbies + "'" + "}";
+    }
+
+}

de.hhn.ai.prog2.blatt1.exceptions/src/app/PersonService.java

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+package app;
+
+/**
+ * PersonService
+ */
+public class PersonService {
+    public static void main() {
+        Person person = new Person("Max", "Mustermann", 18);
+        try {
+            person.addHobby(Hobbies.PROGRAMMIEREN);
+            person.addHobby(Hobbies.PROGRAMMIEREN);
+            person.addHobby(Hobbies.SCHLAFEN);
+            person.addHobby(Hobbies.SONSTIGES);
+            person.addHobby(Hobbies.HOBBY4);
+            person.addHobby(Hobbies.HOBBY5);
+            person.addHobby(Hobbies.HOBBY6);
+        } catch (Exception e) {
+            System.err.println("NoFreeTimeException");
+        }
+        System.out.println(person);
+        try {
+            Person person2 = new Person("", "Muster", 2);
+            System.out.println(person2);
+        } catch (IllegalArgumentException e) {
+            System.err.println("Fehler beim erstellen einer Person");
+        }
+    }
+}

de.hhn.ai.prog2.blatt1.mathematikaufgaben/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

de.hhn.ai.prog2.blatt1.mathematikaufgaben/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<projectDescription>
+  <name>de.hhn.ai.prog2.blatt1.mathematikaufgaben</name>
+  <comment/>
+  <projects>
+    </projects>
+  <buildSpec>
+    <buildCommand>
+      <name>org.eclipse.jdt.core.javabuilder</name>
+      <arguments>
+            </arguments>
+    </buildCommand>
+  </buildSpec>
+  <natures>
+    <nature>org.eclipse.jdt.core.javanature</nature>
+  </natures>
+</projectDescription>

de.hhn.ai.prog2.blatt1.mathematikaufgaben/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,7 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

de.hhn.ai.prog2.blatt1.mathematikaufgaben/.vscode/launch.json

@@ -0,0 +1,21 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "java",
+            "name": "Debug (Launch) - Current File",
+            "request": "launch",
+            "mainClass": "${file}"
+        },
+        {
+            "type": "java",
+            "name": "Debug (Launch)-App<de.hhn.ai.prog2.blatt1.mathematikaufgaben>",
+            "request": "launch",
+            "mainClass": "app.App",
+            "projectName": "de.hhn.ai.prog2.blatt1.mathematikaufgaben"
+        }
+    ]
+}

de.hhn.ai.prog2.blatt1.mathematikaufgaben/src/app/App.java

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+package app;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println(MathLogic.isAbundant(20));
+        System.out.println(MathLogic.isPerfect(28));
+        System.out.println(MathLogic.isHarshad(27));
+        MathLogic.printAllLists(100);
+    }
+}

de.hhn.ai.prog2.blatt1.mathematikaufgaben/src/app/MathLogic.java

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+
+package app;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * MathLogic
+ */
+public class MathLogic {
+
+    /**
+     * Get a list of divisors
+     * 
+     * @param input Integer from which you want to get all divisors
+     * @return List of Divisors
+     */
+    private static List<Integer> getDivisors(int input) {
+        List<Integer> divisors = new ArrayList<Integer>();
+        for (int i = 1; i < input; i++) {
+            if (input % i == 0) {
+                divisors.add(i);
+            }
+        }
+        return divisors;
+    }
+
+    /**
+     * Sum all divisors
+     * 
+     * @param input number wich the divisors shall be summed
+     * @return added up divisors
+     */
+    private static int sumDivisors(int input) {
+        List<Integer> divisors = getDivisors(input);
+        int count = 0;
+        for (int divisor : divisors) {
+            count += divisor;
+        }
+        return count;
+    }
+
+    /**
+     * Test entered number for abundanz
+     * 
+     * @param input number wich shall be tested
+     * @return if `input` is abundant or not?
+     */
+    public static boolean isAbundant(int input) {
+        int count = sumDivisors(input);
+        return count > input;
+    }
+
+    /**
+     * Test entered number for perfect
+     * 
+     * @param input number which shall be tested
+     * @return if `input` is perfect or not?
+     */
+    public static boolean isPerfect(int input) {
+        int count = sumDivisors(input);
+        return count == input;
+    }
+
+    /**
+     * Test entered number for Harshad-Zahl
+     * 
+     * @param input number which shall be tested
+     * @return if `input` is a Harshad-Zahl or not?
+     */
+    public static boolean isHarshad(int input) {
+        int num = input;
+        int sum = 0;
+        while (num > 0) {
+            sum = sum + num % 10;
+            num = num / 10;
+        }
+        return (input % sum) == 0;
+    }
+
+    /**
+     * Print everything
+     * 
+     * @param limit number from 1 where to go
+     */
+    public static void printAllLists(int limit) {
+        List<Integer> abundants = new ArrayList<Integer>();
+        List<Integer> perfects = new ArrayList<Integer>();
+        List<Integer> harshads = new ArrayList<Integer>();
+        for (int i = 1; i <= limit; i++) {
+            if (isAbundant(i))
+                abundants.add(i);
+            if (isPerfect(i))
+                perfects.add(i);
+            if (isHarshad(i))
+                harshads.add(i);
+        }
+        System.out.println("All abundant numbers from 1 to " + limit);
+        System.out.println(abundants);
+        System.out.println("All perfect numbers from 1 to " + limit);
+        System.out.println(perfects);
+        System.out.println("All harshad numbers from 1 to " + limit);
+        System.out.println(harshads);
+    }
+
+}