Inheritance/Multiple: Difference between revisions
Content added Content deleted
(Kotlin snippet updated) |
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to be abstract or to provide accessor implementations. |
to be abstract or to provide accessor implementations. |
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<lang scala> |
<lang scala>interface Camera { |
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interface Camera { |
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val numberOfLenses : Int |
val numberOfLenses : Int |
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} |
} |
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interface MobilePhone { |
interface MobilePhone { |
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fun charge(n : Int) { |
fun charge(n : Int) { |
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if (n >= 0) |
if (n >= 0) |
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battery_level |
battery_level = (battery_level + n).coerceAtMost(100) |
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if (battery_level > 100) battery_level = 100 |
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} |
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} |
} |
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fun main(args: Array<String>) { |
fun main(args: Array<String>) { |
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val c = CameraPhone(1, 50) |
val c = CameraPhone(1, 50) |
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println(c) |
println(c) |
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c.charge(35) |
c.charge(35) |
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println(c) |
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c.charge(78) |
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println(c) |
println(c) |
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println(listOf(c.javaClass.superclass) + c.javaClass.interfaces) |
println(listOf(c.javaClass.superclass) + c.javaClass.interfaces) |
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<pre>CameraPhone(numberOfLenses=1, battery_level=50) |
<pre>CameraPhone(numberOfLenses=1, battery_level=50) |
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CameraPhone(numberOfLenses=1, battery_level=85) |
CameraPhone(numberOfLenses=1, battery_level=85) |
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CameraPhone(numberOfLenses=1, battery_level=100) |
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[class java.lang.Object, interface multiple_inheritance.Camera, interface multiple_inheritance.MobilePhone] |
[class java.lang.Object, interface multiple_inheritance.Camera, interface multiple_inheritance.MobilePhone] |
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TwinLensCamera(numberOfLenses=2) |
TwinLensCamera(numberOfLenses=2) |
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