我正在写一个从另一个类(HotelRoom)继承的类(Suite)。 HotelRoom类具有一个构造函数，该构造函数需要一个参数(一个int值)，因此在Suite的构造函数中，我将其称为super(room)，据我所知应该可以正常工作。 HotelRoom符合要求，但是Suite会给出构造函数错误。任何帮助将不胜感激。这是我的代码如下:

public class HotelRoom
{
    private int roomNumber;
    protected double nightlyRate;
    private final int maxRoomNumber = 999;
    boolean didEnterCorrectRoomNumber = false;

    public HotelRoom(int room)
    {

        if (room > 0 && room <= 299)
        {
            nightlyRate = 69.95;
            didEnterCorrectRoomNumber = true;
            //return didEnterCorrectRoomNumber;
        }
        else if (room > 299 && room <= maxRoomNumber)
        {
            nightlyRate = 89.95;
            didEnterCorrectRoomNumber = true;
            //return didEnterCorrectRoomNumber;
        }
        else
        {
            //return didEnterCorrectRoomNumber;
        }
    }

    public int getRoomNumber ()
    {
        return roomNumber;
    }

    public double getNightlyRate ()
    {
        return nightlyRate;
    }
    public boolean getDidEnterCorrectRoomNumber ()
    {
        return didEnterCorrectRoomNumber;
    }

    public void displayRoom ()
    {
        System.out.println("Room Number: " + roomNumber);
        System.out.format("Cost per Night: $%.2f%n", nightlyRate);
    }

}

public class Suite extends HotelRoom
{
    private final double suiteSurchargeRate = 40.00;
    private double nightlyRateWithSuite;

    public Suite (int room)
    {
        super(room);
        //boolean didEnterCorrectRoomNumber = super.getDidEnterCorrectRoomNumber();
        nightlyRateWithSuite = super.getNightlyRate() + suiteSurchargeRate;
        //return didEnterCorrectRoomNumber;
    }

    public void displayRoom ()
    {
        super.displayRoom();
        System.out.format("Suite Surcharge: $%.2f%n", suiteSurchargeRate);
        System.out.format("Total Cost per Night: $%.2f%n", nightlyRateWithSuite);
    }

}

最佳答案

我认为这与Mac上的Java设置有关。在运行Linux的PC上使用Java 1.6，它可以对我进行编译和运行，并通过以下Main类进行了测试

public class Main {
    public static void main(String[] args) {        
        Suite suite = new Suite(10);
        suite.displayRoom();    
    }
}

Room Number: 0
Cost per Night: $69.95
Suite Surcharge: $40.00
Total Cost per Night: $109.95

https://stackoverflow.com/questions/7049521/