changed the file structure

Code/Steiner/swapArray/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

Code/Steiner/swapArray/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/swapArray/src/App.java

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+import java.util.Scanner;
+
+public class App {
+    public static void main(String[] args) {
+        String[] namen = { "Gian", "Leotrim", "Kevin", "Marco" };
+
+        print(namen);
+        swapArrayPosi(namen, 0, 4);
+        swapArrayPosi(namen, 1, 2);
+
+        System.out.println("Print after the switch:");
+        System.out.println("-----------------");
+
+        print(namen);
+    }
+
+    public static void swapArrayPosi(String[] namen, int numberOne, int numberTwo) {
+        if (numberOne < 0 || numberOne >= namen.length || numberTwo < 0 || numberTwo >= namen.length) {
+            System.out.println("Error: Invalid indices for array swap.");
+        } else {
+            String placeholderString = namen[numberOne];
+            namen[numberOne] = namen[numberTwo];
+            namen[numberTwo] = placeholderString;
+        }
+    }
+
+    public static void print(String[] namen) {
+        for (int i = 0; i < namen.length; i++) {
+            System.out.println(namen[i]);
+        }
+    }
+
+}