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原文地址： http://www.ptbird.cn/2016/07/19/scala-chuji-demo-28/ ‎

There I am,in the world more exciting!

by postbird

www.ptbird.cn


package com.ptbird.scala /** * Created by postbird on 2016/5/26. */ abstract class Person2 case class Student(age: Int) extends Person2 //采用默认的 val 参数 case class Worker2(age: Int, salary: Double) extends Person2 case object Shared extends Person2 object CaseClassObject { def main(args: Array[String]): Unit = { def caseFunc(person: Person2) = person match { case Student(age) => println(age + " years old") case Worker2(age, salary) => println("salary " + salary) case Shared => println("No property") } caseFunc(Student(10)) caseFunc(Worker2(12, 23.0)) caseFunc(Shared) // 10 years old // salary 23.0 // No property val worker = new Worker2(23, 100.1) val worker2 = worker.copy(salary = 100.2) val worker3 = worker.copy(age = 30) //copy的时候，即使是val，也可以改变age 的值 println(worker) println(worker2) println(worker3) // Worker2(23,100.1) // Worker2(23,100.2) // Worker2(30,100.1) } }