--- a/src/java.base/share/classes/sun/security/x509/AVA.java	Thu Dec 13 16:14:07 2018 +0100
+++ b/src/java.base/share/classes/sun/security/x509/AVA.java	Thu Dec 13 15:31:05 2018 +0100
@@ -1245,7 +1245,7 @@
         }
 
         boolean number = false;
-        if (keyword.length() != 0) {
+        if (!keyword.isEmpty()) {
             char ch = keyword.charAt(0);
             if ((ch >= '0') && (ch <= '9')) {
                 number = true;
@@ -1285,7 +1285,7 @@
                 return ak.keyword;
             }
         } else {
-            if (keywordString.length() == 0) {
+            if (keywordString.isEmpty()) {
                 throw new IllegalArgumentException("keyword cannot be empty");
             }
             keywordString = keywordString.trim();