diff --git a/src/main/java/de/tudresden/inf/st/sample/callback/FeedbackHandler.java b/src/main/java/de/tudresden/inf/st/sample/callback/FeedbackHandler.java
index 24a884c63aa6a699f29b47260299a4de9f64a605..734c6d31291864f5439b4eeaf144d6d71749054b 100644
--- a/src/main/java/de/tudresden/inf/st/sample/callback/FeedbackHandler.java
+++ b/src/main/java/de/tudresden/inf/st/sample/callback/FeedbackHandler.java
@@ -4,7 +4,7 @@ import de.tudresden.inf.st.sample.balloon.Token;
 
 import java.util.List;
 
-public class FeedbackHandler extends AbstractHandler{
+public class FeedbackHandler extends AbstractHandler {
 
     public FeedbackHandler(String id, int priority) {
         super(id, priority);
@@ -21,11 +21,11 @@ public class FeedbackHandler extends AbstractHandler{
         String color = result.getColor();
         String object = result.getObject();
 
-        if(result.isPickPlaceSuccess()){
+        if (result.isPickPlaceSuccess()) {
             print("Successfully sorted object " + object + " with color " + color);
         } else {
             print("Failed to sort object " + object);
-            result.getErrorList().forEach(err -> print(err));
+            result.getErrorList().forEach(this::print);
         }
 
         tokens.subList(1, tokens.size()).clear();