4 ms·

The problem is you really want to inherit the implementations as well -- otherwise every one of the classes that use the Isin interface must implement its stora

• gboyer 14y ago
  You can just do both, though. Use interfaces for polymorphism, to define the interactions between your objects -- and then, if you want, use inheritance as one possible strategy for code reuse.
  • colomon 14y ago
    That works great if you're only using one interface in your class. What if you need to include two?
    • gboyer 14y ago
      Then you use a different reuse strategy, like composition. The language is not ideal in this regard, certainly.