Legal self-defense question?

I am a minor in the state of California, is it legal for me to carry a concealed (non-firearm) weapon in case I need to use it for self-defense? For example, I wish to carry around concealed kitchen knife or a concealed rubber malet or a concealed metal hammer or other non-firearm weapon (not switchblades either) or more than one of the aforementioned weapons (or an improvised non-firearm weapon). Is it legal to carry these things and is it legal self-defense if I use them to ward off possible aggressors?