After DND AbstractButton, setSelected not work

Question

Recently, I got problem in DND with AbstractButton
and would like to share my finding
After DND an AbstractButton,
Within the DragSourceListener.dragDropEnd
I get the dragged AbstractButton and invoke its
AbstractButton.setSelected(false);
The selection still visible, nothing have been changed
Therefore, I println the AbstractButton.isSelected();
And the console shows "false"
Then, I tried to invoke invalidate, revalidate, doLayout, repaint
but the result is the same
Finally, I called setEnabled( ! isEnabled() ) twice and it work correctly

Answer 1

So you're the one who took my crystal ball, Kaj!One doesn't need any fancy gadgets to see that it's
201 in Person.Nope, but with this crystal ball I can see that the OP
will ask for more help, and an explanation of the
answer. So now I'm prepared :)
/KajUhm..... yep, that's an advantage :)