在Scala中case class 的运用

package gjhs114

import scala.collection.mutable.ArrayBuffer

// 1
case class DreamItem(content: String, var isDone: Boolean, deadline: String, var order: Int) {

}

object Test19 {
  def main(args: Array[String]): Unit = {
    //   2
    val dreamList = ArrayBuffer[DreamItem]()
    //   3
    val dream1 = DreamItem("家里摆一张台球桌", false, "2000-10-10", 2)
    dreamList +=DreamItem("我想入伍",false,"2014-2-31",1)
    dreamList +=DreamItem("想自己买一部手机",true,"2012-8-24",5)
    dreamList +=DreamItem("我想留长头发",false,"2024-8-29",3)
    dreamList +=DreamItem("家里摆个麻将桌",false,"2024-7-13",4)
    dreamList += DreamItem("环游世界", false, "2012-8-25", 6)
    dreamList += DreamItem("学会一门新语言", false, "2012-8-26", 7)
    dreamList += DreamItem("参加马拉松比赛", true, "2012-8-28", 8)
    dreamList += DreamItem("学习钢琴", false, "2012-8-29", 9)
    dreamList += DreamItem("拥有自己的公司", false, "2012-8-30", 10)
//    4
    dreamList(1).isDone = true
//    5
    dreamList(3).order = 4
//    6
    val list = dreamList.sortWith((a,b)=>a.order >b.order)
//    7
    val newList = list.slice(0,5)
//    8
    newList.foreach(e =>{
      println(s"${e.content} \t\t ${e.isDone}  \t ${e.order}")
    })

  }

}