回答編集履歴
2
コード追加。
test
CHANGED
|
@@ -31,3 +31,49 @@
|
|
|
31
31
|
```
|
|
32
32
|
|
|
33
33
|
|
|
34
|
+
|
|
35
|
+
```kotlin
|
|
36
|
+
|
|
37
|
+
open class Base() {}
|
|
38
|
+
|
|
39
|
+
class A: Base() {}
|
|
40
|
+
|
|
41
|
+
class B: Base() {}
|
|
42
|
+
|
|
43
|
+
|
|
44
|
+
|
|
45
|
+
fun checkSubclass(x: Base) {
|
|
46
|
+
|
|
47
|
+
var isString = when (x) {
|
|
48
|
+
|
|
49
|
+
is A -> "A"
|
|
50
|
+
|
|
51
|
+
is B -> "B"
|
|
52
|
+
|
|
53
|
+
else -> "Others"
|
|
54
|
+
|
|
55
|
+
}
|
|
56
|
+
|
|
57
|
+
println(isString)
|
|
58
|
+
|
|
59
|
+
}
|
|
60
|
+
|
|
61
|
+
|
|
62
|
+
|
|
63
|
+
fun main(args: Array<String>) {
|
|
64
|
+
|
|
65
|
+
checkSubclass(A()) //=> A
|
|
66
|
+
|
|
67
|
+
checkSubclass(B()) //=> B
|
|
68
|
+
|
|
69
|
+
}
|
|
70
|
+
|
|
71
|
+
```
|
|
72
|
+
|
|
73
|
+
|
|
74
|
+
|
|
75
|
+
[Try Kotlin](https://try.kotlinlang.org/)で動作確認しました。
|
|
76
|
+
|
|
77
|
+
|
|
78
|
+
|
|
79
|
+
|
1
Any削除でコード追加。
test
CHANGED
|
@@ -1 +1,33 @@
|
|
|
1
|
-
|
|
1
|
+
サブクラスの判定とか？
|
|
2
|
+
|
|
3
|
+
|
|
4
|
+
|
|
5
|
+
```kotlin
|
|
6
|
+
|
|
7
|
+
fun checkString(x: Any) {
|
|
8
|
+
|
|
9
|
+
var isString = when (x) {
|
|
10
|
+
|
|
11
|
+
is String -> "String"
|
|
12
|
+
|
|
13
|
+
else -> "Others"
|
|
14
|
+
|
|
15
|
+
}
|
|
16
|
+
|
|
17
|
+
println(isString)
|
|
18
|
+
|
|
19
|
+
}
|
|
20
|
+
|
|
21
|
+
|
|
22
|
+
|
|
23
|
+
fun main(args: Array<String>) {
|
|
24
|
+
|
|
25
|
+
checkString("hogehoge") //=> String
|
|
26
|
+
|
|
27
|
+
checkString(999) //=> Others
|
|
28
|
+
|
|
29
|
+
}
|
|
30
|
+
|
|
31
|
+
```
|
|
32
|
+
|
|
33
|
+
|