Here is the De Anza German course catalog:
https://www.deanza.edu/german/courses.html
If you look at the prerequisites, each 10-week course is approximately equivalent to one year of high school German. For example, German 3 lists a prerequisite of German 2 or two years of high school German.
However, the schedule indicates that only German 1-3 are offered in winter and spring 2016:
https://www.deanza.edu/schedule/classes/