Hunter, who lives in Pleasanton, was arraigned April 27 and has been freed on bond.
The charges stem from an incident more than two months ago at a residence on the UC campus. The alleged victim came forward after what UC Police Capt. Joyce Souza described as "escalated aggressive behavior" and "threats."
Souza said in a previous interview that Hunter and the alleged victim, a fellow student, knew each other but were not in a dating relationship.
Hunter is a member of the UC Davis swim team. He graduated from San Ramon Valley High School in 2008, and was a member of that swim team as well.
A preliminary hearing has been set for May 27.