I recommended the following link

https://docs.oracle.com/javase/8/docs/api/java/time/Duration.html

Best Regards H. Naderpour

although classes take 105 minutes in most of university, it is believed that the standard duration of a class highly depends on the topic and the way of teaching.

I recommended the following link

https://docs.oracle.com/javase/8/docs/api/java/time/Duration.html

Best Regards H. Naderpour

The standard duration of the semester is fifteen weeks over three semesters per year

The standard duration of the semester varies according to the universities, some of which are annual and need 50 hours.

Some of them adopt the semester system 30 hours.