there actually is
(just look here: http://code.compartmental.net/minim/javadoc/ in AudioPlayer)
for example:
player.pause()
&
player.cue(int millis) which can be used to cue back to 0 or any desired position.
if hooked up to the controlP5 gui slider for example you can then even slide through your track like in any other player.
BUT
i always had big problems here with syncronisation, as it wont do this imediatly and sometime after a pause, new cue, and play, it would play a last snipplet from the old cue and then continue with the new, which is rather annoying.
So if you find a good way here, I'd be happy to know.