java - Abstract class or interface for translator objects on Android -

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I want to summarize the translator service for the user. I have the idea of ​​doing this in two ways:

or interface with this method: 

  public null translation (T basic, T1 source);

Or an abstract class with the same method, with generic classes to use with both classes.

Its better, interface or intangible class witch?

How can I do this in Android with normal classes? Because the compiler says that 

  symbol can not be solved

I hope that I understand correctly Generic parameter should appear in the Interface (or Abstract Class) Declaration:

Public Interface Translator & lt; T, T1 & gt; {Public Zero Translation (T Basic, T1 Source); }

Whether an abstract class or an interface is more suitable, it depends on the fact that the interface (or sub-classes of the abstract class) can be seen as an implementation Is similar to the interface / abstract class or not. If the answer is yes, then an abstract class is appropriate.


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