the Java-code for the extended of bank accounts, and exactly this is what we want to demonstrate. 6. Limitations of the Approach In the preceeding sections we presented a way for changing from functional SML-programming to object- oriented Java-programming. It is especially tailored ....  Deitel H.M., Deitel P.J.: Java: How to program. 6th edition, Pearson Education Intemational, 2005.  Gamma E.