method reference for instance method from static method

Sorry for not clearly the title, i’m still new to this and even English.

Collections.sort(aList, (s1, s2) ->, s2.getAFloat()));

As above, can I use method references? if s1 and s2 are Floats and they don’t use get-a-float method then things become easier:


But with s1.getAFloat() I don’t know how to use method reference or even possible to use it, thanks for answer!