Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Kotlin 类函数


Kotlin 类函数

您也可以在类中使用 函数 来执行某些操作。

示例

Car 类中创建一个 drive() 函数并调用它。

class Car(var brand: String, var model: String, var year: Int) {
  // Class function
  fun drive() {
    println("Wrooom!")
  }
}

fun main() {
  val c1 = Car("Ford", "Mustang", 1969)
  
  // Call the function
  c1.drive()
}
自己尝试一下 »

提示:当函数在类中声明时,它被称为类函数成员函数

注意:当创建类的对象时,它可以访问所有类函数。


类函数参数

就像普通函数一样,您可以将参数传递给类函数。

示例

创建两个函数:drive()speed(),并将参数传递给 speed() 函数。

class Car(var brand: String, var model: String, var year: Int) {
  // Class function
  fun drive() {
    println("Wrooom!")
  }
  
  // Class function with parameters
  fun speed(maxSpeed: Int) {
    println("Max speed is: " + maxSpeed)
  }
}

fun main() {
  val c1 = Car("Ford", "Mustang", 1969)
  
  // Call the functions
  c1.drive()
  c1.speed(200)
}
自己尝试一下 »


×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.