Use isEmpty().
diff --git a/src/main/java/org/apache/commons/fileupload2/util/mime/MimeUtility.java b/src/main/java/org/apache/commons/fileupload2/util/mime/MimeUtility.java
index eac17a3..690e394 100644
--- a/src/main/java/org/apache/commons/fileupload2/util/mime/MimeUtility.java
+++ b/src/main/java/org/apache/commons/fileupload2/util/mime/MimeUtility.java
@@ -231,7 +231,7 @@
         final String encodedText = word.substring(encodingPos + 1, encodedTextPos);
 
         // seems a bit silly to encode a null string, but easy to deal with.
-        if (encodedText.length() == 0) {
+        if (encodedText.isEmpty()) {
             return "";
         }