Unless you have special arrangements with the academic department, student are not able to swap classes.
If it is still within the Add/Drop period for the semester, you may drop your registered course and select a new one, provided it is available.
If it is after the Add period, you will need to speak with the department of the new course to obtain permission to add the course late.
The deadlines to add/drop/withdraw courses can be viewed on the Dates and Deadlines page of our website.