src/share/classes/sun/awt/dnd/SunDropTargetContextPeer.java

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2013, 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) 2000, 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
*** 237,246 ****
--- 237,253 ----
          Long lFormat = null;
          Transferable localTransferable = local;
  
          if (localTransferable != null) {
              return localTransferable.getTransferData(df);
+         } else if (df.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType)) {
+             // Workaround to JDK-8024061: Exception thrown when drag and drop
+             //      between two components is executed quickly.
+             // It is expected localTransferable is not null if javaJVMLocalObjectMimeType
+             // is used. Executing further results in ClassCastException, so null is
+             // returned here as no transfer data is available in this case.
+             return null;
          }
  
          if (dropStatus != STATUS_ACCEPT || dropComplete) {
              throw new InvalidDnDOperationException("No drop current");
          }