Question

Suppose i have a interface like this,

interface MyIntf{
  void generate();
}

and a method like below

void run(Myintf x) {
  x.generate();
}

I could call run() with an object of a class which implements MyIntf.

but is it possible in Java to declare run without an explicit name for the interface.

i.e. can i specify run() like this?

void run("Some object which has a method called 'void generate()'" x){
  x.generate();
}

and run() can be called with an object of any class which has a method called

void generate();

Answer 1

Java uses “nominative” rather than “structural” typing.

Just because a method has the same name and parameters, doesn’t mean it does the same thing (put the camera/gun to you head and shoot). If you need to make a legacy type conform to a particular interface, use an adapter. Avoid reflection.