class Person {
      private val name = "Weiking"
      def getName = name
    }
    class Student extends Person {
      def getAge= 26
    }
    object test{
      def main(args: Array[String]): Unit = {
        val stu=new Student
        printf(stu.getName,stu.getAge)
      }
    }

 class Person1 {
      val age = 48
      def getName = "Weiking"
    }
    class Student1 extends Person1 {
      override val age = 20
      override def getName="jack"    // 重写父类方法
      def ParentMember =println("我父亲的名字是 "+ super.getName,"我父亲今年"+super.age)  //super调用父类的方法getName可以，调用父类的字段age就会报错
      def selfMember =println("我的名字是 "+ getName,"我今年"+age)
    }
    object test{
      def main(args: Array[String]): Unit = {
        val stu=new Student1
        stu.ParentMember   //Error:(19, 73) super may be not be used on value age
        stu.selfMember
      }
    }

class Person{}
class Student extends Person{}

object Test {
  def main(args: Array[String]): Unit = {
  val person =new Student
  println(person.isInstanceOf[Person])
    println(person.isInstanceOf[Student])
if (person.isInstanceOf[Student]){
  val stu =person.asInstanceOf[Student]

}

class Person{}
class Student extends Person{}

object Test {
  def main(args: Array[String]): Unit = {
    val p: Person =  new Student
    var s: Student = null
    println(p.isInstanceOf[Student])
    println(s.isInstanceOf[Student])

    println(s.asInstanceOf[Student])
 }
}

class Person{}
class Student extends Person{}
class Teacher extends Person{}
object Test {
  def main(args: Array[String]): Unit = {
    val p: Person = new Student
    p match {
      case pe: Teacher  => println("person对象")
      case stu: Student => println("student对象")
    }
  }
}

class Person{}
class Student extends Person{}
object Test {
  def main(args: Array[String]): Unit = {
    val person: Person = new Student
    val ob: Class[_ <: Person] = person.getClass
    val cla: Class[Student] = classOf[Student]
    if (person.getClass == classOf[Person]) println("True") else println("false") 
    if (person.getClass == classOf[Student]) println("True") else println("false")
    if(1.getClass==classOf[Int]) println("True") else println("false")
  }
}