scala – 通过一组构造函数传递参数的问题

package scalasandbox

object Main {
  def main(args: Array[String]): Unit = {
    val creature: Creature = new Human("First")
    creature.rename("Second")
    creature.introduce
  }
}

class Creature(var name: String) {
  def introduce = println("I'm creature: " + name)

  def rename(newName: String) = {
    println("Creature was renamed to: " + newName)
    name = newName
  }
}

class Human(name: String) extends Creature(name) {
  override def introduce = println("I'm Human: " + name)
}

产生以下输出

Creature was renamed to: Second
I'm human: First

我希望它是“我是人类：第二”,因为重命名方法应该改变字段值.我用反编译器打开了Human类：

package scalasandbox;

import scala.Predef.;
import scala.ScalaObject;
import scala.collection.mutable.StringBuilder;
import scala.reflect.ScalaSignature;

@ScalaSignature(bytes="0601212A!01020113t)01*^7b]*t1!0107tG06d27m]1oIn|07p01012407011!020502b215t!!0302n05tA1I]3biV24Xr0502f355tABC01160325318-317b23tyABA06TG06d27m242kK16$b02Ct01050305132102n02t9fW.32t03'Yq!a0313n05Ua21A02)sK22,g-0302301t111336:j]36T!!0607t13i01A21A1602rqJg.33;?)taR040502b01!)21#07a01%!)q0401C!A05I21N34;s_22,8-Z1302CA211BI0503G121A!268ji02")
public class Human extends Creature
  implements ScalaObject
{
  private final String name;

  public void introduce()
  {
    Predef..MODULE$.println(new StringBuilder().append("I'm Human: ").append(this.name).toString());
  }

  public Human(String name)
  {
    super(name);
  }
}

并看到“私有最终字符串名称;”那里.我认为它隐藏了生物名称字段.和

Predef..MODULE$.println(new StringBuilder().append("I'm Human: ").append(this.name).toString());

由于“this.name”而不是方法调用“this.name()”,这些东西看起来也很可疑.任何人都可以解释我的错误在哪里以及实现这两个类的正确方法是什么？