X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fio%2FJalviewFileFilter.java;h=10dc9ea939b2d22d600be98037bfb66028acb005;hb=17b7d054cf7faa5ee57ad8c8c4c9daa495d8cb35;hp=bc20342411989ab165db672f9462cfd5a7e77b9a;hpb=d360dff412aba57c53f05b2d75eec53678cdcd80;p=jalview.git

diff --git a/src/jalview/io/JalviewFileFilter.java b/src/jalview/io/JalviewFileFilter.java
index bc20342..10dc9ea 100755
--- a/src/jalview/io/JalviewFileFilter.java
+++ b/src/jalview/io/JalviewFileFilter.java
@@ -20,6 +20,8 @@
  */
 package jalview.io;
 
+import java.util.Locale;
+
 import java.io.File;
 import java.util.Hashtable;
 import java.util.Iterator;
@@ -121,7 +123,7 @@ public class JalviewFileFilter extends FileFilter
         }
       }
     }
-    
+
     return false;
   }
 
@@ -134,7 +136,7 @@ public class JalviewFileFilter extends FileFilter
 
       if ((i > 0) && (i < (filename.length() - 1)))
       {
-        return filename.substring(i + 1).toLowerCase();
+        return filename.substring(i + 1).toLowerCase(Locale.ROOT);
       }
 
       ;
@@ -150,7 +152,7 @@ public class JalviewFileFilter extends FileFilter
       filters = new LinkedHashMap<>(5);
     }
 
-    filters.put(extension.toLowerCase(), this);
+    filters.put(extension.toLowerCase(Locale.ROOT), this);
     fullDescription = null;
   }