X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fio%2FJalviewFileView.java;fp=src%2Fjalview%2Fio%2FJalviewFileView.java;h=b90bd7aca13d8626fa6a685d1413d6bd330f86ff;hb=3efc24bc7b7855ff135fa96e35ab1004eaeb4f5e;hp=52d130c3bf69643f355caf1c1a26f41aa98b8a57;hpb=dae56c38c3f14e96308540c30f35ca8f1d917edf;p=jalview.git

diff --git a/src/jalview/io/JalviewFileView.java b/src/jalview/io/JalviewFileView.java
index 52d130c..b90bd7a 100755
--- a/src/jalview/io/JalviewFileView.java
+++ b/src/jalview/io/JalviewFileView.java
@@ -20,6 +20,8 @@
  */
 package jalview.io;
 
+import java.util.Locale;
+
 import jalview.util.MessageManager;
 
 import java.io.File;
@@ -47,7 +49,7 @@ public class JalviewFileView extends FileView
       String exts = ff.getExtensions();
       for (String ext : exts.split(","))
       {
-        ext = ext.trim().toLowerCase();
+        ext = ext.trim().toLowerCase(Locale.ROOT);
         extensions.put(ext,
                 desc + ("jar".equals(ext) ? " (old)" : ""));
       }
@@ -136,7 +138,7 @@ public class JalviewFileView extends FileView
 
     if ((i > 0) && (i < (s.length() - 1)))
     {
-      ext = s.substring(i + 1).toLowerCase();
+      ext = s.substring(i + 1).toLowerCase(Locale.ROOT);
     }
 
     return ext;