Two interfaces specify methods with the same signature, but specified to have different behavior?

Question

I have some class public class myClass implements A, B where A and B both contain a method public int doSomething();, but A.doSomething is specified by the interface to do something different than B.doSomething.

I have read Two interfaces with same method signature implemented in Java class, but that doesn't really address my problem, because the methods are overriden to do the same thing, but as I said above, my question is about when they are specified in the interfaces to do different things.

For example, suppose A.doSomething() is supposed to return 0, while B.doSomething() is supposed to throw an exception, and violating either one wold cause problems for methods that are supposed to take them as parameters.

Is there any way to do this in java? If so, how would one actually do it?

Answer 1

As per JLS (This is similar case like what you want, may not exact)

interface Fish { int getNumberOfScales(); }
interface StringBass { double getNumberOfScales(); }
class Bass implements Fish, StringBass {
    // This declaration cannot be correct, no matter what type is used.
    public ??? getNumberOfScales() { return 91; }
}

It is impossible to declare a method named getNumberOfScales whose signature and return type are compatible with those of both the methods declared in interface Fish and in interface StringBass, because a class cannot have multiple methods with the same signature and different primitive return types (§8.4).

Unless you change your design by adding proxy (or) method signature it is not possible to do what you are expecting.