Java extend class with a reflected class

today I tried to make a reflection to my code but I came across a problem because I had to extend class with relfected class, it was something like this:

I have this classes reflected:

"some.package.a.SomeClass"
"some.package.b.SomeClass"

and now I need to extend another class with one of them

public MyClass extends SomeClass {
    @Override
    public Object...

is there any way that I can achieve this?