How do I make an heterogeneous list in Haskell? (originally in Java)

Question

How to convert following Java implementation into Haskell?

The major purpose here is having a list that contains various elements which are sub-type of a particular in

Answer 1

To migrate from OOP to Haskell, read this:

http://www.haskell.org/haskellwiki/OOP_vs_type_classes