Мой код не работает

class WhatIsInheritance{
    public static void main(String []args){
    Box box1 = new Box();
    Box box2 = new Box(1,2,3);
    int vol=box2.volume();
    System.out.println("volume= "+vol);
    ColorBox box3 = new Colorbox(3,4,5,6);
    int voltwo=box3.volume();
    System.out.println("Super Volume= "+voltwo);
    System.out.println("Color= "+box3.color);

    }
}


class Box{
    int width;
    int height, depth;
    int volume(){
    return width * height * depth;
    }
    Box(){
    width=-1;
    height=-1;
    depth=-1;
    }
    Box(int comm){
    comm= width= height= depth;
    }
    Box(int a, int b, int c){
        width=a;
        height=b;
        depth=c;
    }
}


class ColorBox extends Box{
    int color;
    ColorBox(int a, int b, int c, int d){
    color=a; 
    width= b;
    height=c;
    depth= d;
    }
}