returning a Void object

Question

What is the correct way to return a Void type, when it isn\'t a primitive? Eg. I currently use null as below.

interface B{ E method();          


        

Answer 1

Just for the sake of it, there is of course the possibility to create Void instance using reflection:

interface B{ E method(); }

class A implements B{

    public Void method(){
        // do something

        try {
            Constructor voidConstructor = Void.class.getDeclaredConstructor();
            voidConstructor.setAccessible(true);
            return voidConstructor.newInstance();
        } catch (Exception ex) {
            // Rethrow, or return null, or whatever.
        }
    }
}

You probably won't do that in production.