Is there any relation between the class that implements interface and that interface?

Question

Consider this class hierarchy:

• Book extends Goods
• Book implements Taxable

As we know, there is a relationship

Answer 1

"Behaves like..."

That's what what I would say. Not is something, but behaves like something. Or as an alternative "can something", but that's more specific than behaviour.

Answer 2

This should do:

public static boolean implementsInterface(Object object, Class interf){
    return interf.isInstance(object);
}

For example,

 java.io.Serializable.class.isInstance("a test string")

evaluates to true.

from: Test if object implements interface