Question

我最近学习了面向对象的python，并且在过去的几天里一直在努力学习Dart。但是，我在学习如何制作子类方面遇到了麻烦。

这是我想要在python中实现的结果：

class Employee:

  def __init__(self, fistName, lastName, pay):
    self.firstName = firstName
    self.lastName = lastName
    self.pay = pay

class Developer(Employee):

  def __init__(self, firstName, lastName, pay, languages):
    super().__init__(firstName, lastName, pay)
    self.languages = languages

developer = Developer('John', 'Doe', 5000, ['Python', 'Java'])

在dart中，这是我到目前为止的代码：

class Employee {

  String firstName;
  String lastName;
  num pay;

  Employee(this.firstName, this.lastName, this.pay);
}

class Developer extends Employee{

  List<String> languages;

  Developer(?);
}

void main(){ 
  var developer = new Developer('John', 'Doe', 5000, ['Python', 'Java'])
}

如何完成代码以便获得与python相同的结果？

Answer 1

你可以这样做

class Employee {

  String firstName;
  String lastName;
  num pay;

  Employee(this.firstName, this.lastName, this.pay);
}

class Developer extends Employee{

  List<String> languages;

  Developer(String firstName, String lastName, num pay, this.languages): super(firstName, lastName, pay);
}

void main(){ 
  var developer = new Developer('John', 'Doe', 5000, ['Python', 'Java']);
}

如何在Dart中为子类正确使用super方法？

1 个答案: