第五章 类

getter和setter

object HelloWorld  {
  def main(args: Array[String]) {
    val p = new Person
    p.age = 10
    p.age = 5
    print(p.age)  // 10   
  }
}

class Person{
  private var privateAge = 0
  def age = privateAge   // 相当于java的setter
  def age_=(newValue: Int) = {   // 相当于java的getter
    if(newValue > privateAge) privateAge = newValue
  }
}