diff --git a/src/Bubblesort.java b/src/Bubblesort.java
new file mode 100644
index 0000000..e8932fc
--- /dev/null
+++ b/src/Bubblesort.java
@@ -0,0 +1,27 @@
+public static void main(String[] args){
+
+}
+
+public static void bubblesort(int[] arr){
+    ///  aus der Vorlesung:
+    boolean ready = false;
+
+    while (!ready) {
+        ready = true;
+
+        for (int i = 0; i < arr.length -1; i++) {
+
+            if (arr[i] > arr[i+1]) {
+                ready = false;
+
+                int m = arr[i];
+                arr[i] = arr[i+1];
+                arr[i+1] = m;
+            } // if
+
+        } // for
+
+        System.out.println(Arrays.toString(arr));
+    } // while
+
+}
\ No newline at end of file
diff --git a/src/src/Main.java b/src/src/Main.java
new file mode 100644
index 0000000..3d87d6e
--- /dev/null
+++ b/src/src/Main.java
@@ -0,0 +1,13 @@
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+void main() {
+    //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+    // to see how IntelliJ IDEA suggests fixing it.
+    IO.println(String.format("Hello and welcome!"));
+
+    for (int i = 1; i <= 5; i++) {
+        //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+        // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+        IO.println("i = " + i);
+    }
+}
diff --git a/.idea/src/test.java b/src/test.java
similarity index 94%
rename from .idea/src/test.java
rename to src/test.java
index 1ad922f..e5103ff 100644
--- a/.idea/src/test.java
+++ b/src/test.java
@@ -1,3 +1,5 @@
 public static void main(String[] args){
     System.out.println("Test");
-}
\ No newline at end of file
+}
+
+