What are "kackos"? One of the test cases was wrong. I clicked on it to see the test case input and expected results. The response asked if I am willing to pay "5 hackos"

I responded: "No" because I do not understand what "hackos" mean.

"Required methods" should be listed in the problem description.

My code is not working. Its not reading the input properly can any one help me on this...

lass Calculate{

final Display output =new  Display();

public int get_int_val() throws IOException {
    int number =0;
    Scanner sc=new Scanner(System.in);
    if(sc.hasNextInt()){
        number = sc.nextInt();
    }else{
        sc.close();
    }


return number;
}

public double get_double_val() throws IOException{
    double number =0;
    Scanner sc=new Scanner(System.in);
    if(sc.hasNextDouble()){
        number = sc.nextDouble();
    }

    return number;
}

public static Calculate do_calc(){

    return new Calculate();
}

public double get_volume(int a){

    if(a <= 0){
        throw new NumberFormatException("All the values must be positive");
    }else{
        DecimalFormat df = new DecimalFormat("#.000");
        return Double.parseDouble(df.format(a * a * a));

    }

}

public double get_volume(int l, int b, int h){

    if(l <= 0 || b <= 0 || h <= 0){
        throw new NumberFormatException("All the values must be positive");
    }else{
        DecimalFormat df = new DecimalFormat("#.000");
        return Double.parseDouble(df.format(l * b * h));

    }

}

public double get_volume(double r){



    if(r <= 0){
        throw new NumberFormatException("All the values must be positive");
    }else{
        DecimalFormat df = new DecimalFormat("#.000");
        return Double.parseDouble(df.format((2/3)*3.14159265*(r*r*r)));

    }

}


public double get_volume(double r, double h){



    if(r <= 0 || h <=0 ){
        throw new NumberFormatException("All the values must be positive");
    }else{
        DecimalFormat df = new DecimalFormat("#.000");
        return Double.parseDouble(df.format(3.14159265*(r * r * h)));

    }

}

}

class Display{

public void display(double volume){

    System.out.println(volume);

}

}

What exactly is this exercise meant to be teaching?

The problem is contrived and you and end up with convoluted rubbish that is just staggeringly bad code. If I were reviewing this it would be sent straight back to the engineer.

I was beginning to have my doubts about how useful HackerRank was and this just confirms my suspicions.

If you want to learn how to write good code then look elsewhere.

That problem was seriously more complicated than it needed to be.