src/java.desktop/share/classes/javax/swing/plaf/basic/BasicToolTipUI.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -185,11 +185,11 @@
 
         Dimension prefSize = new Dimension(insets.left+insets.right,
                                            insets.top+insets.bottom);
         String text = ((JToolTip)c).getTipText();
 
-        if ((text == null) || text.equals("")) {
+        if (text == null) {
             text = "";
         }
         else {
             View v = (c != null) ? (View) c.getClientProperty("html") : null;
             if (v != null) {