如何修复此错误：类中的构造函数无法应用于给定类型 [重复]

Question

我收到此错误： 电动汽车.java：第 6 行：构造函数 类汽车中的汽车不能应用于给定的类型;

我不确定为什么会这样，因为ElectricCar构造函数没有引用超类(除了扩展它的类)。我该如何解决这个问题？

这是我的代码：

CarTester.java：

    public class CarTester
{
    public static void main(String[] args)
    {
        // Create a Car object
        Car a = new Car("Car1", "1000");
        // Print out the model
        System.out.println(a.getModel());
        
        System.out.println(a.getMPG());
        // Print out the MPG
        
        // Print the object
        System.out.println(a.toString());
        
        // Create an ElectricCar object
        ElectricCar b = new ElectricCar("Car2");
        
        // Print out the model
        System.out.println(b.getModel());
        // Print out the MPG
        System.out.println(b.getMPG());
        // Print the object
        System.out.println(b.toString());
    }
}

电动汽车.java：（此类的第 6 行出现错误）

public class ElectricCar extends Car {

private String model;
// Complete the constructor

public ElectricCar(String model){
    this.model = model;
}

public String getModel()
{
    return model;
}

@Override
public String getMPG()
{
    return "Electric cars do not calculate MPG.";
}

// Override the getMPG here.
// It should return: "Electric cars do not calculate MPG.

@Override
public String toString()
{
    return model + " is an electric car.";
}
// Override the toString() here.
// (model) is an  electric car.

}

汽车. java:

public class Car {

//This code is complete
private String model;
private String mpg;

public Car(String model, String mpg){
    this.model = model;
    this.mpg = mpg;
}

public String getModel(){
    return model;
}

public String getMPG(){
    return mpg;
}

public String toString(){
    return model + " gets " + mpg + " mpg.";
}

}

Answer 1

您可以添加不带参数（空）的类内Car构造函数。这应该能解决问题