colo
欲买桂花同载酒
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设计不可变Person类并实现伴生对象和模式匹配 实现要点：定义主构造器为val的不可变类伴生对象中实现apply工厂方法实现unapply方法支持模式匹配添加isAdult业务方法代码结构：class Person private (val name: String, val age: Int) { def isAdult: Boolean = age >= 18 } object Person { def apply(name: String, age: Int): Person = new Person(name, age) def unapply(p: Person): Option[(String, Int)] = Some((p.name, p.age)) } -
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