Dart编程实例 - 命名构造函数

void main() {           

   Car c1 = new Car.namedConst('E1001');                                       

   Car c2 = new Car();

}           

class Car {                   

   Car() {                           

      print("Non-parameterized constructor invoked");

   }                                   

   Car.namedConst(String engine) {

      print("The engine is : ${engine}");    

   }                               

}