Passing int[][] as generic parameter
up vote
18
down vote
favorite
public static <T> void func1(T arr) {
...
}
public static <T> void func2(T arr) {
...
}
I'm trying to pass a 2-dimensional array, int arr.
I cannot use func1(arr) , but I can use func2(arr)
Can someone explain me how this works?
java generics methods parameters parameter-passing
edited Nov 18 at 9:54
Muntasir
6081818
asked Nov 17 at 21:12
Sumit Das
564615
add a comment |
up vote
18
down vote
favorite
public static <T> void func1(T arr) {
...
}
public static <T> void func2(T arr) {
...
}
I'm trying to pass a 2-dimensional array, int arr.
I cannot use func1(arr) , but I can use func2(arr)
Can someone explain me how this works?
java generics methods parameters parameter-passing
edited Nov 18 at 9:54
Muntasir
6081818
asked Nov 17 at 21:12
Sumit Das
564615
add a comment |
up vote
18
down vote
favorite
up vote
18
down vote
favorite
public static <T> void func1(T arr) {
...
}
public static <T> void func2(T arr) {
...
}
I'm trying to pass a 2-dimensional array, int arr.
I cannot use func1(arr) , but I can use func2(arr)
Can someone explain me how this works?
java generics methods parameters parameter-passing
edited Nov 18 at 9:54
Muntasir
6081818
asked Nov 17 at 21:12
Sumit Das
564615
public static <T> void func1(T arr) {
...
}
public static <T> void func2(T arr) {
...
}
I'm trying to pass a 2-dimensional array, int arr.
I cannot use func1(arr) , but I can use func2(arr)
Can someone explain me how this works?
java generics methods parameters parameter-passing
java generics methods parameters parameter-passing
edited Nov 18 at 9:54
Muntasir
6081818
asked Nov 17 at 21:12
Sumit Das
564615
edited Nov 18 at 9:54
Muntasir
6081818
asked Nov 17 at 21:12
Sumit Das
564615
edited Nov 18 at 9:54
Muntasir
6081818
edited Nov 18 at 9:54
Muntasir
6081818
edited Nov 18 at 9:54
Muntasir
6081818
6081818
asked Nov 17 at 21:12
Sumit Das
564615
asked Nov 17 at 21:12
Sumit Das
564615
asked Nov 17 at 21:12
Sumit Das
564615
564615
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
up vote
24
down vote
T represents an array of some generic object. Any array type (including int) is an object. Therefore, int is a valid T when T = int.
However, because int is not an object, int is not a valid T.
answered Nov 17 at 21:14
Joe C
10.1k52341
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
add a comment |
up vote
1
down vote
If you you use Integer instead of int, you should be able to:
- call
func1withInteger arr
- call
func2withInteger arrorInteger arr
answered Nov 17 at 23:56
TeeKea
2,21741228
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
24
down vote
T represents an array of some generic object. Any array type (including int) is an object. Therefore, int is a valid T when T = int.
However, because int is not an object, int is not a valid T.
answered Nov 17 at 21:14
Joe C
10.1k52341
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
add a comment |
up vote
24
down vote
T represents an array of some generic object. Any array type (including int) is an object. Therefore, int is a valid T when T = int.
However, because int is not an object, int is not a valid T.
answered Nov 17 at 21:14
Joe C
10.1k52341
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
add a comment |
up vote
24
down vote
up vote
24
down vote
T represents an array of some generic object. Any array type (including int) is an object. Therefore, int is a valid T when T = int.
However, because int is not an object, int is not a valid T.
answered Nov 17 at 21:14
Joe C
10.1k52341
T represents an array of some generic object. Any array type (including int) is an object. Therefore, int is a valid T when T = int.
However, because int is not an object, int is not a valid T.
answered Nov 17 at 21:14
Joe C
10.1k52341
answered Nov 17 at 21:14
Joe C
10.1k52341
answered Nov 17 at 21:14
Joe C
10.1k52341
answered Nov 17 at 21:14
Joe C
10.1k52341
10.1k52341
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
add a comment |
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
4
4
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
To expand on this, you could change it to Integer arr; and it should work.
– LadyCailin
Nov 17 at 22:28
3
3
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
@LadyCailin true, but in most cases when you need multi-dimensional arrays, it is really bad idea to use wrapper types
– user1643723
Nov 18 at 6:25
add a comment |
up vote
1
down vote
If you you use Integer instead of int, you should be able to:
- call
func1withInteger arr
- call
func2withInteger arrorInteger arr
answered Nov 17 at 23:56
TeeKea
2,21741228
add a comment |
up vote
1
down vote
If you you use Integer instead of int, you should be able to:
- call
func1withInteger arr
- call
func2withInteger arrorInteger arr
answered Nov 17 at 23:56
TeeKea
2,21741228
add a comment |
up vote
1
down vote
up vote
1
down vote
If you you use Integer instead of int, you should be able to:
- call
func1withInteger arr
- call
func2withInteger arrorInteger arr
answered Nov 17 at 23:56
TeeKea
2,21741228
If you you use Integer instead of int, you should be able to:
- call
func1withInteger arr
- call
func2withInteger arrorInteger arr
answered Nov 17 at 23:56
TeeKea
2,21741228
edited Nov 18 at 0:55
answered Nov 17 at 23:56
TeeKea
2,21741228
answered Nov 17 at 23:56
TeeKea
2,21741228
answered Nov 17 at 23:56
TeeKea
2,21741228
2,21741228
add a comment |
add a comment |
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