static method vs instance method vs lambda

Asked Apr 25 '16 at 21:41

Active Apr 25 '16 at 21:59

Viewed 94 times

Whenever I need to define local helper methods in a class, I find myself wondering how exactly I should define them. The following three options seem interchangeable to me. Which one is best (objectively) and why? **I found several threads about static vs instance methods, but none which also mentioned local lambda's:

private void ifEmpty(Collection c) {
    if(c.isEmpty())
        throw new IllegalStateException();
}

private static void ifEmpty(Collection c) {
    if(c.isEmpty())
        throw new IllegalStateException();
}

private Consumer<Collection> ifEmpty = (c) -> {if(c.isEmpty()) throw new IllegalStateException();};

edited Apr 25 '16 at 21:59

asked Apr 25 '16 at 21:41

Roel

2

I would use none, since all of them are using a raw `List`. – Tom Apr 25 '16 at 21:43
Valid point(I'll update). Which one would you use if list would be replaced by collection? – Roel Apr 25 '16 at 21:55
still none, still raw. – Tom Apr 25 '16 at 22:09
Could you tell me a better type to use? I cannot come up with one. – Roel Apr 25 '16 at 22:11
[What is a raw type and why shouldn't we use it?](http://stackoverflow.com/q/2770321) – Tom Apr 25 '16 at 22:12

static method vs instance method vs lambda

0 Answers0