The HyperlinkEvent doesn't seem to provide this information. One way I
can think of at this moment, is to add a MouseListener to the
JEditorPane, record the state in the mousePressed and mouseReleased
handlers, and use this state in the HyperLinkListener.
However, I don't know if the ordening of the events might prevent you
from detecting it. For instance, the editor pane might have its own
mouse listener --which detects the mouse press on a hyperlink and fires
hyperlinkUpdate-- *before* your mouse listener has a chance to record
which button was pressed.