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}") } fun printTest() { println("我是类的函数") } } fun main(args: Array<String>) { val w3xue = W3xue("W3xue教程") println(w3xue.siteName) println(w3xue.url) println(w3xue.country) w3xue.printTest() }