Question

I have an interface.

public interface Module {
        void init();
        void actions();
}

What happens when i try to create an array like this?

Module[] instances = new Module[20]

How can i implement this array?

Answer 1

yes, it is possible. You need to fill the fields of the array with objects of Type Module

instances[0] = new MyModule();

And MyModule is a class implementing the Module interface. Alternatively you could use anonymous inner classes:

instances[0] = new Module() {
 public void actions() {}
 public void init() {}
};

Does this answer your question?