package test_27
case class Book(var bookName:String, var author: String, var price: Double){
}
object caseclass{
def main(args: Array[String]): Unit = {
val set1 = scala.collection.mutable.Set[Book]()
val book1 =new Book("西游记","吴承恩",100)
val book2 =new Book("西游记","吴承恩",100)
val book3 =new Book("西游记","吴承恩",100)
println(book1 ==book2)
set1 +=book1
set1 +=book2
set1 +=book3
set1.foreach(s =>{
println(s.author)
})
}
}
结果是：true
吴承恩