java - 调用多个构造函数 - 只调用同一个构造函数？

Question

我是 Java 的新手，我搞不懂这个。我试过在我的对象的参数中传递值，但它只想转到没有参数的构造函数。其他 2 个有多个参数，但它没有注意到它？提前致谢!

代码如下:

    Car vehicle1 = new Car();
    Car vehicle2 = new Car();
    Car vehicle3 = new Car();

public Car() {

    private int numberOfCars;

    private String company;
    private String modelName;
    private String modelYear;
    private double hp;
    private int doors;
    private String gears;
    private String color;
    private boolean racingCar;
    private double price;

        numberOfCars = -1;
        company = "***EMPTY***";
        modelName = "***EMPTY***";
        modelYear = "***EMPTY***";
        hp = -1;
        doors = -1;
        gears = "***EMPTY***";
        color = "***EMPTY***";
        racingCar = false;
        price = -1;
    }
    public Car(String companyName, String modelNa, String modelYe){

        numberOfCars = -1;
        company = companyName;
        modelName = modelNa;
        modelYear = modelYe;
        hp = -1;
        doors = -1;
        gears = "***EMPTY***";
        color = "***EMPTY***";
        racingCar = false;
        price = -1;
    }
    public Car(int carAmount, String companyTitle, String modelTitle, String modelBirth, double horsePower, int door, String gearType, String colors, boolean raceCar, double prices){

        numberOfCars = carAmount;
        company = companyTitle;
        modelName = modelTitle;
        modelYear = modelBirth;
        hp = horsePower;
        doors = door;
        gears = gearType;
        color = colors;
        racingCar = raceCar;
        price = prices;
    }

Answer 1

为了调用其他构造函数，您需要在构建对象时指定参数:

Car vehicle1 = new Car();
Car vehicle2 = new Car("companyName", "modelNa", "modelYe");
Car vehicle3 = new Car(2, "companyTitle", "modelTitle", "modelBirth", 5.2, 4, "gearType", "colors", false, 1600);