继承无效

Question

从我的代码中，我希望我的卧室类继承超类-房间的长度和宽度。我已在评论的相应行中填充了错误。我遇到错误，找不到出路。请帮帮我？

package index;

public class Room {
int length;
int breadth;

Room(int x,int y)
{
    length = x;
    breadth = y;
}
int area(){
    return (length*breadth);
}
}

class BedRoom extends Room{      //Implicit super constructor Room() is undefined for default constructor. Must define an explicit constructor
    int height;
    public void Bedroom(int x,int y,int z)
    {
        super(x,y);    //Constructor call must be the first statement in a constructor
        height=z;
    }


int volume(){
    return (length*breadth*height);
    }
}
class InherTest
{
    public static void main(String args[])
    {
        BedRoom room1 = new BedRoom(14,12,10); //The constructor BedRoom(int, int, int) is undefined
        int area1 = room1.area();
        int volume1 = room1.volume();
        System.out.println("Area1 = "+area1);
        System.out.println("Volume1 = "+volume1);
    }

}

Answer 1

您的BedRoom类具有 伪构造函数， 而不是真正的构造函数。构造函数不返回任何内容，也不返回空值。摆脱该无效声明。

更改

public void Bedroom(int x,int y,int z)

至

public BedRoom(int x,int y,int z) // also capitalize correctly