ArrayIndexOutOfBounds exception in main method

Question

I am getting array bound error but to my mind, array starts from 0, so what is wrong with this code?

public class Quadratic {

    public static void main(String         


        

Answer 1

Protect yourself: be defensive.

    public class Quadratic {

    public static void main(String[] args) {

        if (args.length> 1) {
            double b = ((args.length > 0) ? Double.parseDouble(args[0]) : 0.0);
            double c = ((args.length > 1) ? Double.parseDouble(args[1]) : 0.0);

            double discriminant = b*b - 4.0*c;
            double sqroot = Math.sqrt(discriminant);

            double root1 = (-b + sqroot)/ 2.0;
            double root2 = (-b - sqroot)/ 2.0;

            System.out.println(root1);
            System.out.println(root2);
        } else {
            System.out.println("two arguments are required: b and c, please");
        }
    }
}

What happens if the discriminant is negative? What if it's zero?

Why are you restricting yourself to the case where a = 1?