Newton Raphson Method

package NumericalComputing.NewtonRaphsonMethod;

import java.util.Scanner;

@interface DaudKakumirizi
{
    String name() default " ";
    String ID() default " ";
}
@DaudKakumirizi(name = "Kakumirizi Daud", ID = "17/BSS/BU/R/0010")

public class NewtonRaphson {
    public static void main(String[] args) {
        double x0,root,givenError,error;
        boolean flag=true;
        int i=1;
        Scanner sc = new Scanner(System.in);
        int highest_degree;
        System.out.println("What is the highest degree of your polynomial? ");
        Scanner input = new Scanner(System.in);
        highest_degree = input.nextInt();
        for (int j = highest_degree; j >= 0; j--) {
            int coeff_deg_j;
            coeff_deg_j = poly_input(j);
            /**System.out.println(coeff_deg_i); */
        }

        System.out.print("Enter value for x0 : ");
        x0 = sc.nextDouble();

        givenError=x0;

        while(flag){
            root = x0 - (F(x0)/Fprime_X(x0));
            error = Math.abs((root-x0)/root)*100;

            System.out.println("Iteration : "+ i++);
            System.out.println("Root:"+root);
            System.out.println("Error:"+error);
            x0 = root;

            if(givenError>error)
            {
                flag=false;
            }
        }
    }

    public static double F(double x){
        return Math.pow(x,3)-(0.165*Math.pow(x,2))+(3.993*Math.pow(10,-4));
    }


    public static double Fprime_X(double x){
        return 3*Math.pow(x,2)-0.33*x;
    }
    public static int poly_input(int degree) {

        System.out.println("Please enter coefficient for degree " + degree);

        Scanner input = new Scanner(System.in);
        int coefficient;
        coefficient = input.nextInt();
        return coefficient;
    }
    /**
     * This program has been written by KAKUMIRIZI DAUD
     */

}