scala

import scala.collection.mutable
object Test24_1 {
  def main(args: Array[String]): Unit = {
    //1
    val books = mutable.Set("春秋", "水浒传", "西游记")
    //2
    books += "诗经"
    books += "Java编程思想"
    //3
    books -= "诗经"
    //4
    val a = books.contains("Python从入门到实践")
    //5
    val books2 = mutable.Set("西游记", "三国演义")
    //6
    val hj = books.union(books2)
    println(hj)
    //7
    val jj = books.intersect(books2)
    println(jj)
    //8
    val cj = books.diff(books2)
    println(cj)
  }

}