diff --git a/.devcontainer.json b/.devcontainer.json
new file mode 100644
index 0000000..bfbeb0d
--- /dev/null
+++ b/.devcontainer.json
@@ -0,0 +1,3 @@
+{
+    "image": "mcr.microsoft.com/devcontainers/java:21"
+}
\ No newline at end of file
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..add4f4e
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "vscjava.vscode-java-pack"
+    ]
+}
\ No newline at end of file
diff --git a/Exercise.java b/Exercise.java
index 3c092f9..69c97a1 100644
--- a/Exercise.java
+++ b/Exercise.java
@@ -1,6 +1,30 @@
+import java.util.Scanner;
+
 public class Exercise {
 
   public static void main(String[] args) {
-    // implement exercise here
+    @SuppressWarnings("resource")
+    Scanner scanner = new Scanner(System.in);
+
+    System.out.print("Gib bitte eine ganze Zahl ein: ");
+    int number = scanner.nextInt();
+
+    boolean isPrime = true;
+
+    if (number < 2) {
+      isPrime = false;
+    } else if (number > 2) {
+      for (int i = 2; i < number; i++) {
+        if (number % i == 0) {
+          isPrime = false;
+          break;
+        }
+      }
+    }
+
+    System.out.println(
+        isPrime
+            ? "Ergebnis: Die eingegebene Zahl ist eine Primzahl"
+            : "Ergebnis: Die eingegebene Zahl ist keine Primzahl");
   }
 }