Let’s say I have the following functional interface in Java 8:
interface Action<T, U> {
U execute(T t);
}
And for some cases I need an action without arguments or return type. So I write
something like this:
Action<Void, Void> a = () -> { System.out.println("Do nothing!"); };
However, it gives me compile error, I need to write it as
Action<Void, Void> a = (Void v) -> { System.out.println("Do nothing!"); return null;};
Which is ugly. Is there any way to get rid of the Void type parameter?
