Scala例题练习

package Scala1
import scala.collection.mutable
object dsjkks {
  def main(args: Array[String]): Unit = {
    //1
  val library=mutable.Set("java编程思想","Scala实战")
    //2
  library+="动物世界"
  library+="骆驼祥子"
  //3
    library-="Scala实战"
    println(library)
  //4
    val rs=library.contains("Python从入门到实践")
    println(rs)
    //5
    val book=mutable.Set("java编程思想","动物世界")
    //6
    val rs1=library.union(book)
    println(rs1)
    //7
    val rs2=library.intersect(book)
    println(rs2)
    //8
    val rs3=library.diff(book)
    println(rs3)
  }
}