如何解决类中构造函数不能应用的错误？[关闭]

Question

public class VehicleMain
{
    public static void main(String[] args){
        Vehicle jeep = new Vehicle(21,15.5);
        System.out.println(jeep);

public class Vehicle 
{
    // instance variables
    private double tankSize;
    private int mpg;
    private double fuelInTank; 



    /**
     * Constructor for objects of class Vehicle
     */
    public int Vehicle(int mpg, double tankSize)
    {
    // TODO
    
    fuelInTank = 0;
    return (int)fuelInTank;
}

/**
 * Returns the miles that this vehicle can drive based on how much fuel is left
 * in the tank and the mpg.
 */
public int milesLeftOnTank(){
    // TODO
    double milesLeft = mpg*fuelInTank;
    return (int)milesLeft;
}

Answer 1

您已将构造函数设置为

public int Vehicle(int mpg, double tankSize)

构造函数没有返回类型，当您给出返回类型时，它被认为是一个方法。构造函数没有返回类型。

移除return语句并将声明更改为

public Vehicle(int mpg, double tankSize)