Question

package learnclass;

public class Car {

    public String manuName;
    public int engineCC;
    public float fuelammount;
    public float carWeight;

    public float presentAmountFuel(){

        return fuelammount;
    }


}

//////////////////////

package learnclass;

public class LearningClass {
    static private Car ourCar;
    public static void main(String[] args) {

        ourCar.

    }

}

我无法通过ourCar对象访问presentAmountFuel（）方法。为什么会这样？

Answer 1

如果您的方法不是静态的，则必须先初始化对象，然后才能使用其方法。

尝试使用以下代码访问您的对象方法：

package learnclass;

public class LearningClass 
{
    static private Car ourCar;
    public static void main(String[] args) 
    {
        ourCar = new Car();   // Initialize your object before you can use its method presentAmountFuel()
        ourCar.presentAmountFuel();    
    }

}

Answer 2

您需要实例化对象。

static private Car ourCar = new Car();

为什么我无法访问此方法？

2 个答案: