From 4ea716be6c1bfefb6c1a773f4f031bf98c7179c8 Mon Sep 17 00:00:00 2001
From: Lucas Alber <lucas.alber@student.kit.edu>
Date: Wed, 27 Feb 2019 15:27:19 +0100
Subject: [PATCH] TextArea may not be thread-safe

---
 src/main/java/org/lalber/tools/exifrotation/Main.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/lalber/tools/exifrotation/Main.java b/src/main/java/org/lalber/tools/exifrotation/Main.java
index c3240dd..12b74c4 100644
--- a/src/main/java/org/lalber/tools/exifrotation/Main.java
+++ b/src/main/java/org/lalber/tools/exifrotation/Main.java
@@ -32,7 +32,7 @@ public class Main {
         JPanel mainPanel = new JPanel();
         mainPanel.setBorder(new TitledBorder(new EtchedBorder(), "Process:"));
 
-        JTextArea textArea = new JTextArea(16, 58);
+        final JTextArea textArea = new JTextArea(16, 58);
         textArea.setEditable(false);
         JScrollPane scroll = new JScrollPane(textArea);
         scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
@@ -71,7 +71,9 @@ public class Main {
                         .parallelStream()
                         .forEach(p -> {
                             if (aborted) return;
-                            textArea.append("Processing: " + p.getFileName().toString() + "\n");
+                            synchronized (textArea) {
+                                textArea.append("Processing: " + p.getFileName().toString() + "\n");
+                            }
                             Image img = new Image(p.toFile());
                             img.rotate();
                             img.saveAs(p.toFile());