在Kotlin中,抽象類是一種定義接口和實(shí)現(xiàn)部分功能的方式,從而提高代碼的復(fù)用性。以下是如何使用抽象類來提高代碼復(fù)用的幾個(gè)建議:
abstract class Shape {
abstract fun area(): Double
}
class Circle(radius: Double) : Shape() {
override fun area(): Double {
return Math.PI * radius * radius
}
}
class Rectangle(width: Double, height: Double) : Shape() {
override fun area(): Double {
return width * height
}
}
abstract class Shape {
fun area(): Double {
throw NotImplementedError("You should implement this method")
}
fun perimeter(): Double {
return 2 * (area() / Math.PI).toDouble()
}
}
class Circle(radius: Double) : Shape() {
override fun area(): Double {
return Math.PI * radius * radius
}
}
abstract class Shape {
protected var x: Double
protected var y: Double
constructor(x: Double, y: Double) {
this.x = x
this.y = y
}
abstract fun area(): Double
}
class Rectangle(x: Double, y: Double, width: Double, height: Double) : Shape(x, y) {
override fun area(): Double {
return width * height
}
}
abstract class Shape {
abstract fun area(): Double
}
abstract class ColorShape(shape: Shape) : Shape() {
override fun area(): Double {
return shape.area()
}
}
class Circle(x: Double, y: Double, radius: Double) : Shape() {
override fun area(): Double {
return Math.PI * radius * radius
}
}
class ColoredCircle(x: Double, y: Double, radius: Double, color: String) : ColorShape(Circle(x, y, radius)) {
override fun area(): Double {
return super.area()
}
}
通過以上方法,您可以在Kotlin中使用抽象類來提高代碼的復(fù)用性。