From d3936993d3b1a552e278e13791c6d5c2276a1031 Mon Sep 17 00:00:00 2001
From: ofrezuufghkbdfejv <fajhsdhljshyfsdejhgfk@kjksgcf>
Date: Mon, 18 Dec 2023 17:18:26 +0100
Subject: [PATCH] stack + queue

---
 Stack.java | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Stack.java

diff --git a/Stack.java b/Stack.java
new file mode 100644
index 0000000..f15db93
--- /dev/null
+++ b/Stack.java
@@ -0,0 +1,52 @@
+
+/**
+ * Beschreiben Sie hier die Klasse List_T_.
+ * 
+ * @author (Ihr Name) 
+ * @version (eine Versionsnummer oder ein Datum)
+ */
+public class Stack<T>
+{
+    private Node<T> first;
+    
+    public Stack() {
+        first = null;
+    }
+    
+    public boolean isEmpty() {
+        if (first == null) return true;
+        return false;
+    }
+
+    
+    public T top(int n) {
+        if (first == null) return null;
+        return first.wert;
+    }
+    
+    public void push(T val) {
+        Node<T> neu = new Node <T>();
+        neu.wert = val;
+        neu.next = first;
+    
+        first = neu; 
+    }
+
+    
+    public T pop(int n) {
+        if (first == null) return null;
+        T tmp = first.wert; // wert von first (=0) speichern
+        first = first.next; //first "pfeil" auf den nächsten
+        return tmp;//wert ausgeben
+    }
+    
+    public String toString(){ // glaub um halt alles schön auszugeben 
+        String result = "";
+        Node<T> current = first;
+        while (current != null){
+            result += current.wert + ", ";
+            current = current.next;
+        }
+        return result;
+    }
+    }