Call to pop failing in my java code.

Question

public void CardToPile() {
    waste.push(reserve.pop);
}

Answer 1

public void CardToPile() {
        waste.push(reserve.pop()); //Here is the error
    }

You need to add the parens in order to call the method.

Answer 2

If by "not working" you mean that it does not compile, it might be because your call to reserve.pop seems incorrect. You might have meant reserve.pop().