public class Testing {
public static void main(String[] args) {
List<? extends Integer> list = new ArrayList<>();
list.add(new Integer(21));
}
}
What is the compilation error in line#4?
Asked
Active
Viewed 36 times
0
Unheilig
- 16,196
- 193
- 68
- 98
Babu Reddy H
- 186
- 1
- 11
-
1What exception you getting? Did you try it? – Subodh Joshi Oct 15 '15 at 06:00
-
he method add(capture#1-of ? extends Integer) in the type List
is not applicable for the arguments (Integer) – Babu Reddy H Oct 15 '15 at 06:00 -
`? extends Something` is a producer... You cannot **add** values to it... (You can actually add `null` which doesnt make sense anyway). – Codebender Oct 15 '15 at 06:04