Help, J1!

I need your advices!

I am now on F1, I want to change to J1. Here are my options I heard:

1. change of status within states,
2. apply for new J1 visa in Third country/ China?

My F1 visa is still not expired.

my question is: if my J1 is denied, can I still have my F1 visa. That means, am I still in the F1 status in case of change of status within states,

can I still enter the US with my F1 visa, in case of applying for new j1?



thank you very much!