Quadratic Equation

import java.util.*;
public class QuadRoot
{
    double a,b,c,r1,r2;
    QuadRoot(int x,int y,int z)
    {
        a=x;
        b=y;
        c=z;
        r1=0.0;
        r2=0.0;
    }
    public void getRoots()
    {
        double d=(b*b)-(4*a*c);
        if(d<0)
        {
            System.out.println("Roots are not possible");
            System.exit(1);
        }
        r1=(-b+Math.sqrt(d))/(2*a);
        r2=(-b-Math.sqrt(d))/(2*a);
    }
    public void printRoots()
    {
        System.out.println("Root 1: "+r1);
        System.out.println("Root 2: "+r2);
    }
    public static void main(String args[])
    {
        int x=0,y=0,z=0;
        Scanner sc=new Scanner(System.in);
        System.out.println("Quadratic Equation General Form: Ax²+Bx+C");
        System.out.print("A: ");
        x=sc.nextInt();
        System.out.print("B: ");
        y=sc.nextInt();
        System.out.print("C: ");
        z=sc.nextInt();
        QuadRoot ob=new QuadRoot(x,y,z);
        ob.getRoots();
        ob.printRoots();
    }
}