diff --git a/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/MainApp.java b/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/MainApp.java
index 2bd5f70..8f8ff6c 100644
--- a/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/MainApp.java	
+++ b/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/MainApp.java	
@@ -23,8 +23,7 @@ public static void main(String[] args) throws Exception {
     public void start(Stage primaryStage) {
         TreeTableView<Player> treeTableView = new TreeTableView<>();
         TreeItem<Player> root = new TreeItem<>(new Player("Joachim", "Löw", 0));
-        root.getChildren().add(new TreeItem<Player>(
-                new Player("Manuel", "Neuer", 0)));
+		root.getChildren().add(new TreeItem<Player>(new Player("Manuel", "Neuer", 0)));
         root.getChildren().add(new TreeItem<Player>(new Player("Philipp", "Lahm", 0)));
         treeTableView.setRoot(root);
         TreeTableColumn<Player, String> firstNameColumn = new TreeTableColumn<Player, String>("Vorname");
diff --git a/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/Player.java b/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/Player.java
index 470c919..d82be44 100644
--- a/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/Player.java	
+++ b/Kapitel 4/4.2.9/controls-treetableview/src/main/java/de/javafxbuch/Player.java	
@@ -1,8 +1,3 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
 package de.javafxbuch;
 
 public class Player {
diff --git a/Kapitel 4/4.2.9/controls-treeview-simplecell/src/main/java/de/javafxbuch/MainApp.java b/Kapitel 4/4.2.9/controls-treeview-simplecell/src/main/java/de/javafxbuch/MainApp.java
index 3b21ad8..c436ba4 100644
--- a/Kapitel 4/4.2.9/controls-treeview-simplecell/src/main/java/de/javafxbuch/MainApp.java	
+++ b/Kapitel 4/4.2.9/controls-treeview-simplecell/src/main/java/de/javafxbuch/MainApp.java	
@@ -21,6 +21,7 @@ public void start(Stage primaryStage) {
         TreeView treeView = new TreeView();
         TreeItem<Color> root = new TreeItem<>(Color.RED);
         treeView.setRoot(root);
+        treeView.setEditable(true);
         treeView.setCellFactory(TextFieldTreeCell.forTreeView(new StringConverter<Color>() {
             @Override
             public String toString(Color object) {
@@ -33,19 +34,17 @@ public Color fromString(String string) {
                 try {
                     web = Color.web(string);
                 } catch (Exception e) {
-// im Fehlerfall geben wir Schwarz als Farbe zurueck 
+                    // im Fehlerfall geben wir Schwarz als Farbe zurueck 
                 }
                 return web;
             }
         }
         ));
-        root.getChildren()
-                .add(new TreeItem<Color>(Color.BLUE));
+		root.getChildren().add(new TreeItem<Color>(Color.BLUE));
         StackPane pane = new StackPane(treeView);
         Scene scene = new Scene(pane, 300, 250);
 
-        primaryStage.setTitle(
-                "TableView Demo");
+		primaryStage.setTitle("TableView Demo");
         primaryStage.setScene(scene);
 
         primaryStage.show();