diff --git a/Stack.class b/Stack.class
index 0ff75fa..c20a294 100644
Binary files a/Stack.class and b/Stack.class differ
diff --git a/Stack.java b/Stack.java
index ac03d33..7c9637b 100644
--- a/Stack.java
+++ b/Stack.java
@@ -8,11 +8,16 @@ public class Stack<ContentType> {
 
 
     public void push( ContentType pContentObject ) {
-        // TODO: Implementiere push
+        if (head != null) {
+            StackNode<ContentType> node = new StackNode<ContentType>(pContentObject);
+            node.setNext(head);
+            head = node;
+        } else {
+            head = new StackNode<ContentType>(pContentObject);
+        }
     }
 
     public void pop() {
-        // TODO: Implementiere pop
         if( head != null ) {
             head = head.getNext();
         }