Scala中Map集合的应用

import scala.collection.mutable
object Test4 {
  def main(args: Array[String]): Unit = {
    //1.
    val books = mutable.Map("001" ->("三国演义","罗贯中",23),"002"->("彷徨","鲁迅",12))
    //2.
    books += ("003"->("水浒传","施耐庵",43))
    books += ("004"->("西游记","吴承恩",49))
    //3.
    val rs =books.get("002")
    //4.
    books("002") = ("彷徨","鲁迅",100)
    //5.
    books -="001"
    //6.
    books.foreach { case (k, v) =>
      println(s"编号:${k},书籍名称，作者，库存数量:${v}")
    println(rs)
    println(books)

    }
  }
}