Can I limit the methods another class can call in Java?

Question

Let\'s assume I have classes A, B, and C where class C has readable and writable properties:

public class         


        

Answer 1

Yes it is, but you have to go through some gyrations.

public interface Incrementable {
    public void increment();
}

public interface Readable {
    public int getScore();
}

public class C implements Incrementable, Readable
{
    ...
}

Now when you define the method in A that receives a reference to a B instance, define that method to take an Incrementable instead. For B, define it to take a Readable.