I don't like the term compile-time polymorphism. You can use runtime binding (polymorphism) with instance methods. Static members and fields, if called, are bound to their declaring class at compile-time, but lots of people here post how much they get confused when that happens, so it is probably best to say there is no such thing as compile-time polymorphism in Java. But I am sure other people will have a different opinion.
Look at this FAQ, which is relevant.
We begin by testing your absorbancy by exposing you to this tiny ad: