Question

What is that I’m missing about this snippet of code?

public class Zero<N extends Number> {
  public N zero() {
    return new Integer(0);
  }
}

It says:

Type mismatch: cannot convert from Integer to N

Thanks!

Update I’ve changed the snippet to use an integer. Same thing happens. And it happens even when creating an anonymous subclass of Number. Could it be Eclipse that is faulty about this?

Answer 1

While an Integer is a Number, an Integer might not be compatible to N which can be any subclass of Number.