Java Generics Puzzler, extending a class and using wildcards

Question

I\'ve been beating my head against this one for awhile and thought that maybe some fresh eyes will see the issue; thanks for your time.

import java.util.*;

clas         


        

Answer 1

Replacing the definition of TbinList with

class TbinList extends ArrayList> {}

and defining test2 with

TbinList test2 = new TbinList<>();

instead would solve the issue.

With your definition you're ending up with an ArrayList> where T is any fixed class extending Base.