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最新推荐文章于 2026-01-09 15:15:24 发布

原创最新推荐文章于 2026-01-09 15:15:24 发布 · 181 阅读

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#java #开发语言

import scala.collection.mutable

object Test24_1 {
  def main(args: Array[String]): Unit = {
    //1
    val books =mutable.Set("朝花夕拾","活着")
    //2
    books += "三体"
    books += "西游记"
    books -= "三体"
    books ++= mutable.Set("朝花夕拾","活着","西游记")
    val  rs =books.contains("Python从入门到实践")
    println(s"Python从入门到实践是否存在:${rs}")
  //  println(books)
  val books2 = mutable.Set("朝花夕拾", "红楼梦", "长歌行")
    println(books2)
    val rs2 = books2.union(books)
    println(s"哪些书是他们都有的？ ${rs2}")
    val rs1 = books2.intersect(books)
    println(s"哪些书是他们都有的？ ${rs1}")
    val rs3 = books2.diff(books)
    println(s"哪些书是他们都有的？ ${rs3}")

  }

}