Boxdemo

package boxdemo;

class box{
    int height;
    int weight;
    double depth;

    box(int h,int w,double d){
        height=h;
        weight=w;
        depth=d;
    }

    void displyVol(){
        double ans = height*weight*depth;
        System.out.println(ans);
    }

}

public class Boxdemo {

    public static void main(String[] args) {
        box b1 = new box(10,10,10);
        b1.displyVol();

        box b2 = new box(20,30,10);
        b2.displyVol();
    }

}