scala 样例类

package com.jason.qianfeng

case class Message(sender: String,receiver: String,body: String)

object CaseClassTest {
  def main(args: Array[String]): Unit = {
    println("==case class 的比较")
    val mes = Message("jason","wus","starbuck")
    val mes2 = Message("jason","starbuck")
    println(s"mes : ${mes.toString}")
    println(s"mes2 : ${mes2.toString}")
    println(s" mes == mes2 ? :${mes == mes2}")
    println("==case class copy 方法")
    val mes3 = mes.copy()
    println(s"mes == mes3 ? : ${mes == mes3}")
    println(s"==case class 部分copy")
    val mes4 = mes.copy(sender = "fan")
    println(s"mes: ${mes.toString}")
    println(s"mes4: ${mes4.toString}")
  }
}