Joyce made famous the
stream of consciousness style of writing, most notably in Ulysses, which was actually pioneered by
French author
Eduard Dujardins, in his book "We'll to the Woods No More."
BTW, Ulysses becomes much easier to read with Stuart Gilbert's companion piece ("James Joyce's Ulysses"). Gilbert was the French translator of Ulysses, and actually worked fairly closely with Joyce while he was still working on the book in Paris.
One of Joyce's biggest literary admirers was Anthony Burgess (of Clockwork Orange infamy), who actually wrote a few books on the matter (Joysprick and ReJoyce, and he may have had something to do with the Skeleton's Key to Finnegan's Wake, I'm not sure).
The poor bastard had wretched vision, having had to suffer through 19 eye operations in his life. As such, he had certain very strong opinions about diacritical marks (he hated 'em--considered them an offence to the eye).