Bisection

package bisection;

import java.util.Scanner;

public class Main
{
    static double F(double x)
    {
        double result = (x)*(x)*(x) + (x)*(x) + (x) + 7 ;
        return result;
    }
    public static void main(String[] args)
    {
        int i = 1;
        double x1,x2,x0;
        double f2,f0,f1,t;
        double ESP = 0.001;

        Scanner s = new Scanner(System.in);

        System.out.println("\nEnter the value of x1: ");
         x1 = s.nextDouble(); //-2
        System.out.println("\nEnter the value of x2: ");
        x2 = s.nextDouble(); //-3
        System.out.println("\n__________________________________________________________________\n");
        System.out.println("\niteration\t x1\t       x2\t x0\t   f1\t   f2\t   f0");
        System.out.println("\n___________________________________________________________________\n");
        do
        {
            x0=(x1+x2)/2;
            f1=F(x1);
            f2=F(x2);
            f0=F(x0);
            System.out.println("\n"+" "+i+" "+x1+" "+x2+" "+x0+" "+f1+" "+f2+" "+f0);
            if(f1*f0<0)
            {
                x2=x0;
            }
            else
            {
                x1=x0;
            }
            i++;
        }
        while(Math.abs(f0)>ESP);
        System.out.println("\n__________________________________________________________\n");
        System.out.println("\n\nApp.root = "+x0);

    }
}