A fixed blade knife, carried concealed, is a felony.
A folding knife carried concealed is generally okay. however there are some restrictions in the penal code for both lock type and blade length on school camposes, including universities.
Additionally swithcblades are a misdemeanor if carried in public, or in the passeger compartment of a motor vehicle. The definition of "switchblade is very liberal, including gravity knives and bali-songs. Additionally a knife that may be opened with the flick of a wrist, is a switchblade, unless the knife blade has some type of ball detent or other mechanism that provides a mechanical resistance to being snapped open. Most quality liner locks like Benchmade and Spyderco have a detent, so they are not a "switchblade". But your typical $5.00 made in china gun show liner lock copy may be considered a "switchblade" under california law.
If you are arrested for carrying a concealed fixed blade knife (CPC 12020), you will be booked into jail for the felony but probubly released on your own recognisance later. If you are arrrested for a switchblade (CPC 653k) you will likely be cited and released in the field, on your written promise to appear.