src/java.base/share/classes/sun/security/util/DomainName.java

rev 52881 : 8214971: Replace use of string.equals("") with isEmpty()
Reviewed-by: jlaskey, prappo, lancea, dfuchs, redestad

@@ -361,11 +361,11 @@
                 String[] labels = rule.split("\\.");
                 return new LinkedList<>(Arrays.asList(labels));
             }
 
             private static int numLabels(String rule) {
-                if (rule.equals("")) {
+                if (rule.isEmpty()) {
                     return 0;
                 }
                 int len = rule.length();
                 int count = 0;
                 int index = 0;