Scala：建立对象

package com.donews.objectBean
/**
  * Created by yuhui on 2016/6/15.
  *
  * 注意要点：
  * 1、属性字段必须初始化
  * 2、get和set方法默认有，不需要写
  * 3、没有无参构造函数，只有有参构造函数
  * 4、没有静态代码块，只有代码块
  * 5、每次new一个对象时候，代码块只执行一次
  */

class Person() {
  private var name :String = ""
  private var age :Int = 0

  {
    println("我是普通代码块")
  }

  def this(name : String){
    this()
    this.name = name;
  }

  def this(name: String , age: Int){
    this(name)
    this.age = age
  }

  def ToString: Unit ={
    println("name ->"+name +" , age ->" + age)
  }
}

object Person{
  def main (args: Array[String] ) {
    val p = new Person()
    p.age= 11
    p.name="yuhuione"
    p.ToString

    p.age= 12
    p.name="yuhuitwo"
    p.ToString

    println("==========================")

    val p1 = new Person("yuhuithree")
    p1.ToString
    println("==========================")
    val p2 = new Person("yuhuifour", 30)
    p2.ToString

    p2.age = 14
    p2.ToString
}
}

我是普通代码块
name ->yuhuione , age ->11
name ->yuhuitwo , age ->12
==========================
我是普通代码块
name ->yuhuithree , age ->0
==========================
我是普通代码块
name ->yuhuifour , age ->30
name ->yuhuifour , age ->14

Process finished with exit code 0