Yes, but static methods are not polymorphic.
Polymorphism is this: When you have a reference of an interface or superclass type, but the actual object that it refers to is of a class that implements the interface or a subclass of the superclass, and you call a method on the reference, then
Java dynamically looks up the method in the actual class of the object. For example:
The context of a static method is the class, not the object that you call the method on.
It is possible in Java to call a static method via an object reference, but
you should never do this, because this is confusing (in my opinion this is a flaw in the Java language; it should not have been possible to call a static method via an object reference).
If you do this, it appears as if you are calling the static method on an object, but you are really calling it on the class of the reference type.
Java regards the two sayHello() methods in the classes Super and Sub as two separate methods (that happen to have the same name). sayHello() in class Sub does not override sayHello() in class Super, as with non-static methods.