有没有一种方法可以在摘要类之间共享数据，而IT and It and Ithermant of Companion Object in kotlin中的实现类别
我有一个称为动物的类，这是一个抽象类。
abstract class Animal {
protected var totalAnimals = 0
fun provideTotalAnimals(totalAnimals: Int) {
this.totalAnimals = totalAnimals
}
}
现在，还有另一个正在扩展Animal的课程说dog，
class Dog: Animal() {
fun printTotalDogsAndAnimals(totalDogs: Int) {
val totalAnimals = totalDogs + totalAnimals
println("Total Animals: $totalAnimals")
}
}
因为我正在扩展Animal类，所以我能够掌握TotalAnimals。但是，问题在于totalAnimals无论如何都将始终为0。我通过将TotalAnimals放入Animal类中的伴侣对象中来解决此问题。但是，我想知道，没有使用伴随对象的情况下，有一种更好的方法来共享抽象类及其实现类的数据。我正在考虑的更好的设计课程方法。
I have a class called Animal which is an abstract class.
abstract class Animal {
protected var totalAnimals = 0
fun provideTotalAnimals(totalAnimals: Int) {
this.totalAnimals = totalAnimals
}
}
Now there is another class that is extending Animal says a Dog
class Dog: Animal() {
fun printTotalDogsAndAnimals(totalDogs: Int) {
val totalAnimals = totalDogs + totalAnimals
println("Total Animals: $totalAnimals")
}
}
Since I'm extending the Animal class I'm able to get hold of the totalAnimals. But, the problem is that totalAnimals will be always 0 no matter what. I fixed this by putting the totalAnimals inside a companion object in the Animal class. But, I would like to know is there a better way to share the data from an abstract class and its implementation classes without using a companion object. A better way to design my classes is what I'm looking at.
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您应该覆盖抽象类的功能来设置taterAnimals值。在您的情况下，您将一些值添加到0并打印它。
You should override abstract class's function to set totalAnimals value. In your case, you are adding some value to 0 and printing it.