test 1

.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="openjdk-21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/untitled.iml" filepath="$PROJECT_DIR$/untitled.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

src/HelloWorld.java

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+import java.util.Arrays;
+
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello World");
+    }
+}

src/Main.java

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+
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+        // to see how IntelliJ IDEA suggests fixing it.
+        System.out.println("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+            System.out.println("i = " + i);
+        }
+    }
+}

src/Zahlenfilter.java

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+public class Zahlenfilter {
+
+    public static void main(String[] args) {
+        Filter filter1 = new Filter();
+        filter1.zahlenfiltern();
+    }
+}
+
+class Zahl {
+
+    private int value;
+
+    public Zahl(int value) {
+        this.value = value;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public boolean istDurchFuenfTeilbar() {
+        return value % 5 == 0;
+    }
+
+    public boolean endetAufNeun() {
+        return value % 10 == 9;
+    }
+
+    public int addieren(Zahl other) {
+        return this.value + other.getValue();
+    }
+
+    public boolean istDurchDreiTeilbar() {
+        return (value + (value - 1)) % 3 == 0;
+    }
+}
+
+class Filter {
+
+    public void zahlenfiltern() {
+        Zahl zahl;
+        Zahl vorherigeZahl = new Zahl(0);
+        for (int i = 0; i <= 300; i++) {
+            zahl = new Zahl(i);
+            if (zahl.istDurchFuenfTeilbar()) {
+                System.out.println(i + " ist durch 5 teilbar");
+            } else {
+                if (zahl.endetAufNeun()) {
+                    System.out.println(i + " endet auf 9");
+                } else {
+                    int summe = zahl.addieren(vorherigeZahl);
+                    if (zahl.istDurchDreiTeilbar()) {
+                        System.out.println(i + " und " + (i - 1) + " addiert ergeben " + summe + " und " + summe + " ist durch 3 teilbar");
+                    } else {
+                        System.out.println(i + 1);
+                    }
+                }
+            }
+            vorherigeZahl = zahl;
+        }
+    }
+}

untitled.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>