src/windows/classes/sun/awt/windows/WInputMethod.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2017, 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

@@ -582,10 +582,13 @@
                 int x = 0;
                 int y = 0;
                 Component client = getClientComponent();
 
                 if (client != null) {
+                    if (!client.isShowing()) {
+                        return;
+                    }
                     if (haveActiveClient()) {
                             Rectangle rc = inputContext.getTextLocation(TextHitInfo.leading(0));
                             x = rc.x;
                             y = rc.y + rc.height;
                     } else {