The Clipboard object is a simple container to hold the Transferable. Currently its posting notifications using invokeLater. This should be removed and notifications should be posted in place, because
1. In JDK the Clipboard is used directly only as a Swing sandbox Clipboard where the content is set on the EDT anyway.
2. There's no way to provide the Clipboard as a system clipboard and SunClipboard overrides the setContents method.