class W3xue constructor(name: String) { // 类名为 W3xue // 大括号内是类体构成 var url: String = "//www.w3xue.com" var country: String = "CN" var siteName = name init { println("初始化网站名: ${name}") } // 次构造函数 constructor (name: String, alexa: Int) : this(name) { println("Alexa 排名 $alexa") } fun printTest() { println("我是类的函数") } } fun main(args: Array<String>) { val w3xue = W3xue("W3xue教程", 10000) println(w3xue.siteName) println(w3xue.url) println(w3xue.country) w3xue.printTest() }