changed the file structure

Code/Steiner/Exchange/.vscode/settings.json

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

Code/Steiner/Exchange/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/Exchange/src/App.java

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+import java.util.Scanner;
+
+public class App {
+    static Scanner scan = new Scanner(System.in);
+
+    public static void main(String[] args) throws Exception {
+        System.out.println("Define the variable x, if you would be so kind:");
+        int x = scan.nextInt();
+        System.out.println("now again for y, please:");
+        int y = scan.nextInt();
+
+        System.out.println("Before the exchange");
+        System.out.println(x);
+        System.out.println(y);
+
+        // Exchange
+        int z = x;
+        x = y;
+        y = z;
+
+        System.out.println("after the exchange");
+        System.out.println(x);
+        System.out.println(y);
+
+        /*
+         * Tauschen Sie die Inhalte der beiden Variablen! D. h.: Wenn vor dem
+         * Tausch x den Wert 5 hatte und y den Wert 7, dann soll x nach dem
+         * Tausch den Wert 7 haben und y den Wert 5. Führen Sie den Tausch
+         * so durch, dass der Tausch funktioniert, egal mit welchen Werten x
+         * und y initialisiert wurden.
+         * Sie dürfen nur Code zwischen den beiden Kommentaren //Tausch
+         * und //Nach dem Tausch hinzufügen!
+         */
+
+        scan.close();
+    }
+}