AHHHHHHHHHH COMMITED TO GITHUB INSTEAD OF FORGEJO FOR WEEKS

Code/Steiner/dynamicCasting/.vscode/settings.json

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

Code/Steiner/dynamicCasting/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/dynamicCasting/src/App.java

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+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        ArrayList<Article> list = new ArrayList<Article>();
+        list.add(new Book("11241", 12, "Tolkien", "The Book to rule all books"));
+        list.add(new Camera("0101012", 25000, "Fujifilm"));
+        list.add(new CD("0345678", 56789, "hello",
+                new ArrayList<String>(Arrays.asList("Hello", "World", "THIS IS THE END"))));
+        list.add(new MP3("RASPUTIN", 456789, "Rasputin", "lengh"));
+
+        for (Article article : list) {
+            article.print();
+            if (article instanceof CD) {
+                ((CD) article).playTrack();
+            }
+            System.out.println();
+        }
+    }
+}

Code/Steiner/dynamicCasting/src/Article.java

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+public abstract class Article {
+    String code;
+    double price;
+
+    public Article(String code, double price) {
+        this.code = code;
+        this.price = price;
+    }
+
+    boolean available() {
+        boolean maybe = true;
+        return maybe;
+    }
+
+    abstract void print();
+}

Code/Steiner/dynamicCasting/src/Audio.java

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+public abstract class Audio extends Article {
+    String title;
+
+    public Audio(String code, double price, String title) {
+        super(code, price);
+        this.title = title;
+    }
+
+    abstract void print();
+
+}

Code/Steiner/dynamicCasting/src/Book.java

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+public class Book extends Article {
+    String author;
+    String title;
+
+    public Book(String code, double price, String author, String title) {
+        super(code, price);
+        this.author = author;
+        this.title = title;
+    }
+
+    @Override
+    void print() {
+        System.out.println(this.author + " - " + this.title);
+        System.out.println("Code: " + super.code + "\nPrice: " + super.price);
+    }
+}

Code/Steiner/dynamicCasting/src/CD.java

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+import java.util.ArrayList;
+
+public class CD extends Audio {
+    ArrayList<String> tracks = new ArrayList<>();
+
+    public CD(String code, double price, String title, ArrayList<String> tracks) {
+        super(code, price, title);
+        this.tracks = tracks;
+    }
+
+    @Override
+    void print() {
+        System.out.println("Title: " + title);
+        System.out.println("Code: " + super.code + "\nPrice: " + super.price);
+        for (String string : tracks) {
+            System.out.println(string);
+        }
+    }
+
+    void playTrack() {
+        int i = 1;
+        for (String string : tracks) {
+            System.out.println("Play track " + i + " " + string + " der CD " + title);
+            i++;
+        }
+    }
+}

Code/Steiner/dynamicCasting/src/Camera.java

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+public class Camera extends Article {
+    String brand;
+
+    public Camera(String code, double price, String brand) {
+        super(code, price);
+        this.brand = brand;
+    }
+
+    @Override
+    void print() {
+        System.out.println("Brand: " + this.brand);
+        System.out.println("Code: " + super.code + "\nPrice: " + super.price);
+    }
+}

Code/Steiner/dynamicCasting/src/MP3.java

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+public class MP3 extends Audio {
+    String lengh;
+
+    public MP3(String code, double price, String title, String lengh) {
+        super(code, price, title);
+        this.lengh = lengh;
+    }
+
+    @Override
+    void print() {
+        System.out.println("Title: " + title);
+        System.out.println("Code: " + super.code + "\nPrice: " + super.price);
+        System.out.println("Lengh: " + lengh + " (this was not my typo i was forced to do this)");
+    }
+}