From e9b3a85ac6f4464ef159aa39371191f5b8622bee Mon Sep 17 00:00:00 2001
From: Dominik Gruntz <dominik.gruntz@fhnw.ch>
Date: Sat, 4 Aug 2018 21:45:52 +0200
Subject: [PATCH] Removes ""+ as next argument is already of type String

NumberFormat.getInstance(Locale.US).format(res) returns a String, so
concatenating it with "" is not necessary.
---
 .../src/main/java/de/javafxbuch/CalculatorController.java       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Kapitel 6/6.9/fxml-calculator/src/main/java/de/javafxbuch/CalculatorController.java b/Kapitel 6/6.9/fxml-calculator/src/main/java/de/javafxbuch/CalculatorController.java
index 2e3bc68..ada34af 100644
--- a/Kapitel 6/6.9/fxml-calculator/src/main/java/de/javafxbuch/CalculatorController.java	
+++ b/Kapitel 6/6.9/fxml-calculator/src/main/java/de/javafxbuch/CalculatorController.java	
@@ -68,7 +68,7 @@ public void handleButtonAction(ActionEvent e) {
             try {
                 Number parse = NumberFormat.getInstance(Locale.US).parse(displayedtext.get());
                 double res = parse.doubleValue() * -1;
-                displayedtext.set("" + NumberFormat.getInstance(Locale.US).format(res));
+                displayedtext.set(NumberFormat.getInstance(Locale.US).format(res));
             } catch (ParseException ex) {
                 Logger.getLogger(CalculatorController.class.getName()).log(Level.SEVERE, null, ex);
             }