回答編集履歴
2
インターフェース利用に変更
test
CHANGED
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@@ -1,16 +1,23 @@
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|
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1
1
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```kotlin
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2
2
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class Outer{
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3
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-
val inner : Inner
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3
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+
val inner : IInner
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4
4
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constructor(){
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5
5
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inner = Inner() // OK
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6
6
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}
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7
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-
in
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7
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+
interface IInner{}
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8
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+
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9
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+
private class Inner : IInner{
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10
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+
constructor(){}
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11
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+
}
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8
12
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}
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9
13
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10
14
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fun main(args: Array<String>) {
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11
15
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val outer = Outer() // OK
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12
16
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val inner1 = outer.inner // OK
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17
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+
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18
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+
val inner2 = Outer.Inner() // error: cannot access 'Inner': it is private in 'Outer'
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19
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+
val inner3 = outer.Inner() // error: unresolved reference: Inner
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13
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-
val inner
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20
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+
val inner4 = Outer.IInner() // error: interface IInner does not have constructors
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14
21
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}
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15
22
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16
23
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```
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1
コード変更
test
CHANGED
|
@@ -1,17 +1,16 @@
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|
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1
1
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```kotlin
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2
2
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class Outer{
|
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3
|
+
val inner : Inner
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|
3
4
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constructor(){
|
|
4
|
-
|
|
5
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+
inner = Inner() // OK
|
|
5
6
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}
|
|
6
|
-
inner class Inner{
|
|
7
|
+
inner class Inner{}
|
|
7
|
-
|
|
8
|
-
}
|
|
9
8
|
}
|
|
10
9
|
|
|
10
|
+
fun main(args: Array<String>) {
|
|
11
|
+
val outer = Outer() // OK
|
|
12
|
+
val inner1 = outer.inner // OK
|
|
13
|
+
val inner2 = Outer.Inner() // constructor of inner class Inner can be called only with receiver of containing class
|
|
14
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+
}
|
|
11
15
|
|
|
12
|
-
|
|
13
|
-
fun main(args: Array<String>) {
|
|
14
|
-
val outer = Outer()
|
|
15
|
-
val inner = Outer.Inner() // constructor of inner class Inner can be called only with receiver of containing class
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|
16
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-
}
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|
17
16
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```
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