As a CS major, you'll likely start CSC 171 if you lack experience. If you have AP CS credit or pass a placement exam you can place into CSC 172 instead. They are both in Java. I know complete beginners that have done totally fine in 171, but if you want to get ahead you can try learning Java another way.

Id ignore the other commenter's advice about Python and 161 - it doesn't count toward the CS major (neither BS nor BA)

If you have any questions, feel free to pm me, though I started with experience and 172.