Is the C# “explicit implementation” of the interface present in Java?

Question

In C#, if you have two base interfaces with the same method (say, F()) you can use explicit implementation to perform different impl. for F(). This alloes you to differently

Answer 1

No, there's nothing like C#'s explicit interface implementation in Java.

On the plus side, Java has covariant return types, so if you want to provide a more strongly typed implementation than the interface specifies, that's okay. For instance, this is fine:

interface Foo
{
    Object getBar();
}

public class Test implements Foo
{
    @Override
    public String getBar()
    {
        return "hi";
    }
}

C# wouldn't allow that - and one of the ways around it is typically to implement the interface explicitly and then have a more specific public method (usually called by the interface implementation).