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

*** 1,7 ****
  /*
!  * Copyright (c) 1997, 2014, 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
--- 1,7 ----
  /*
!  * 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
*** 582,591 ****
--- 582,594 ----
                  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 {