dart - 在 Dart 中：我想打印一个前面有一个字符串的 Setter（一个 int），例如： Car age: 7 years

Question

我有以下代码：

class Vehicle {
    String make;
    String model;
    int manufactureYear;
    int vehicleAge;
    String color;
    
Vehicle({
    this.make,
    this.model,
    this.manufactureYear,
    this.color,
});
    
int get age {
    return vehicleAge;
}
    
void set age(int currentYear) {
    vehicleAge = currentYear - manufactureYear;
    }
}
    
void main() {
    Vehicle car = Vehicle(
    make: "Honda", model: "Civic", manufactureYear: 2005, color: "red");
    print("Car make: " + car.make); // output: Honda
    print("Car model: " + car.model); // output: Civic
    car.age = 2012;  // set age
    print(car.age); // output: calculated based on car.age value (7 in this case)
    print("Car color: " + car.color);
}

输出如下：

Car make: Honda
Car model: Civic
7
Car color: red

问题：我想打印“汽车年龄：7”而不是“7”，实现这一目标的最佳方法是什么？