Sort a List of objects by multiple fields

I have a List of Java objects that I want to sort according to more than one field.

public class graduationCeremony {
    String campus;
    String faculty;
    String building;
}

Is it possible to use a Comparator or the Comparable interface to sort the list according to multiple fields? All the examples I have seen sort according to only one field. In other words, one can sort by 'campus' OR 'faculty' OR 'building'. I want to sort by 'campus', then 'faculty', then 'building' (as it exists in SQL: ORDER BY campus, faculty, building)

I think this question has been asked before, but I don't understand the accepted answer. Can someone expand or illustrate this answer?