티스토리 뷰

Java

Generics - Wildcards in Parameters

techbard 2016.07.12 20:55



# Wildcards in Parameters


- <?>                     - unknown type

- <? extends Customer>    - any type that extends Customer

- <? super Customer>      - any type that's super class of Customer


private static void processData(ArrayList<? extends Customer> customers) {

for (Customer c : customers) {

c.doSomething();

}

}


댓글
댓글쓰기 폼
공지사항
Total
407,535
Today
9
Yesterday
19
«   2019/09   »
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30          
글 보관함