scala 主構造函數和輔助構造函數

package scala.day01
import scala.beans.BeanProperty

/**
  * 注意：@BeanProperty會生成四個方法
  * name:String
  * name_ = (new Value:String):Unit
  * getName():String
  * setName(new Value:String):Unit
  *
  * */
//           這個就可以理解爲是主構造器，主構造器不使用，調用輔助構造器，需要調用this方法
//           name是var修飾，有get也有set方法      age是val修飾，只有get方法
class Person(@BeanProperty var  name:String,@BeanProperty val age:Int){
  //私有的成員，必須進行初始化
  private var id = 0
  def insert(a:Int):Unit = {id += a}
  def current():Int = id


  //String  類型的默認值爲null
  @BeanProperty var clazz:String=_
  //Int   類型的默認值爲0
  @BeanProperty var score:Int=_

  //定義輔助構造器1
  def this(name:String,age:Int,clazz:String){
    //調用主構造器的方法，若主構造器爲空，則調用this()
    this(name,age)
    this.clazz = clazz
  }

  //定義輔助構造器2
  def this(name:String,age:Int,clazz:String,score:Int){
    //調用輔助構造器1的構造方法
    this(name,age,clazz)
    this.score = score
  }

  override def toString: String = {
    "name:"+name+",age:"+age+",class:"+clazz+",score:"+score
  }
}
object Person{
  def run():String={".....Person半生對象被調用了,,,."}
}

object Oop1 {
  def main(args: Array[String]): Unit = {
    println(Person.run())
    var p1 = new Person("wangwei",22)
    var p2 = new Person("wangwei",22,"20152001")
    var p3 = new Person("wangwei",22,"20152001",100)
    println(p1.toString)
    println(p2.toString)
    println(p3.toString)
    p1.setName("kkkkkkk")
    p1.setClazz("201503")
    println(p1.toString)
    println(p1.getAge)
    println(p1.getScore)
  }
}