added halberTannenbaum

src/de/schleifen/Main.java

@@ -2,6 +2,6 @@ package de.schleifen;
 
 public class Main {
     public static void main(String[] args) {
-        Schleifen.xEnZweiSchleife();
+        Schleifen.halberTannenbaum();
     }
 }

src/de/schleifen/Schleifen.java

@@ -11,13 +11,17 @@ public class Schleifen {
 
         for (int i=0; i<6; i++) {
             for (int j=0; j<5; j++) {
-                System.out.print("xx");
+                System.out.println("xx");
             }
-            System.out.print("\n");
         }
     }
 
     public static void halberTannenbaum() {
-
+        String x = "x";
+        for (int i=0; i<13; i++) {
+            String y = x + "x";
+            System.out.println(x);
+            x = y;
+        }
     }
 }