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

*** 276,286 ****
  
      /**
       * upcall from native code
       */
  
!     private void dragEnter(final int targetActions,
                             final int modifiers,
                             final int x, final int y) {
          postDragSourceDragEvent(targetActions, modifiers, x, y, DISPATCH_ENTER);
      }
  
--- 276,286 ----
  
      /**
       * upcall from native code
       */
  
!     protected void dragEnter(final int targetActions,
                             final int modifiers,
                             final int x, final int y) {
          postDragSourceDragEvent(targetActions, modifiers, x, y, DISPATCH_ENTER);
      }
  
*** 354,367 ****
          dragImageOffset = null;
      }
  
      public static void setDragDropInProgress(boolean b)
        throws InvalidDnDOperationException {
-         if (dragDropInProgress == b) {
-             throw new InvalidDnDOperationException(getExceptionMessage(b));
-         }
- 
          synchronized (SunDragSourceContextPeer.class) {
              if (dragDropInProgress == b) {
                  throw new InvalidDnDOperationException(getExceptionMessage(b));
              }
              dragDropInProgress = b;
--- 354,363 ----