The best hacker movies, in no particular order, are
The Matrix (1999)
Keanu Reeves stars as computer hacker Neo, who discovers that the whole world's a computer programme designed to enslave humanity. Fortunately, he can learn Kung Fu just by loading up a bit of software. If it was that easy, we'd be black belts by now.
The Matrix spawned a generation of would-be cyber anarchists who decided to show their individuality by wearing black leather coats and hiding moody expressions behind mirror shades.