--- old/src/java.naming/share/classes/com/sun/jndi/ldap/Filter.java	2018-12-06 17:53:18.785507136 -0500
+++ new/src/java.naming/share/classes/com/sun/jndi/ldap/Filter.java	2018-12-06 17:53:18.613506283 -0500
@@ -53,7 +53,7 @@
     static void encodeFilterString(BerEncoder ber, String filterStr,
         boolean isLdapv3) throws IOException, NamingException {
 
-        if ((filterStr == null) || (filterStr.equals(""))) {
+        if ((filterStr == null) || (filterStr.isEmpty())) {
             throw new InvalidSearchFilterException("Empty filter");
         }
         byte[] filter;