changed the file structure

Code/Steiner/oop_theorie_2/.vscode/settings.json

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+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

Code/Steiner/oop_theorie_2/README.md

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+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

Code/Steiner/oop_theorie_2/src/App.java

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+public class App {
+    public static void main(String[] args) throws Exception {
+        // Create an array of Person objects
+        Person[] persons = new Person[5];
+
+        // Initialize the Person objects
+        persons[0] = new Person("Hans", 2012);
+        persons[1] = new Person("Peter", 2011);
+        persons[2] = new Person("Jochen", 2013);
+        persons[3] = new Person("Christian", 2050);
+        persons[4] = new Person("Tobias", 1932);
+
+        // Print each person
+        for (Person person : persons) {
+            person.printPerson();
+        }
+
+        int sumAge = 0;
+        for (Person person : persons) {
+            sumAge += person.getAge();
+        }
+
+        System.out.println("The sum of the age of all people is: " + sumAge);
+    }
+}

Code/Steiner/oop_theorie_2/src/Person.java

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+import java.time.LocalDate;
+
+class Person {
+    private String name;
+    private int age;
+
+    Person(String name, int yearOfBirth) {
+        this.name = name;
+        LocalDate currentDate = LocalDate.now();
+        int year = currentDate.getYear();
+        this.age = year - yearOfBirth;
+        if (this.age < 0) {
+            this.age = 0;
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public void printPerson() {
+        System.out.println(name + " " + age);
+    }
+}