I have this arraylist of GameObjects. I loop through the arraylist, and if the type of the object is door (one of the GameObject's child classes), and if some other conditions match up, i want to call a function from the door class thats only in that class. Is this possible? I'm using Kotlin, but if you only know java i could probably port it.
Add a comment
|
3 Answers
You can use is, as? or with operators combined with smart casts for that.
2 Comments
Alexey Romanov
By
in do you mean is? And with is not an operator at all.
denis.zhdanov
Yes, it's not
in but isIn java you can code as below:
for (GameObject gameObject: GameObjects) {
if(gameObject instanceof Door ) { // you can add your another condition in this if itself
// your implementation for the door object will come here
}
}
Comments
You can use like this:
//Kotlin 1.1
interface GameObject {
fun age():Int
}
class GameObjectDoor(var age: Int) : GameObject{
override fun age():Int = age;
override fun toString():String = "{age=$age}";
}
fun main(args: Array<String>) {
val gameObjects:Array<GameObject> = arrayOf(
GameObjectDoor(1),
GameObjectDoor(2),
GameObjectDoor(3));
for (item: GameObject in gameObjects) {
when (item) {
is GameObjectDoor -> {
var door = item as GameObjectDoor
println(door)
//do thomething with door
}
//is SomeOtherClass -> {do something}
}
}
}
