如何正确使用超级方法用于 Dart 中的子类?

Question

我最近学习了面向对象的python，这几天一直在尝试学习Dart。但是，我在学习如何制作子类时遇到了麻烦。

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'])
}

如何完成代码以获得与 python 中相同的结果？

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']);
}