Write a program in java to determine the roots of quadratic equation (if d>=0) taking a, b, c as input, otherwise roots are Imaginary.

import java.util.*;
class Quadratic_equation
{
    public static void main(String args[])
    {
        int a,b,c;
        double d,r1,r2;
        Scanner sc= new Scanner(System.in);
        System.out.println("Enter the value of a,b,c");
        a=sc.nextInt();
        b=sc.nextInt();
        c=sc.nextInt();
        d=Math.sqrt(b*b-4*a*c);
        if(d>=0)
        {
            r1=(-b+d)/(2*a);
            r2=(-b-d)/(2*a);
            System.out.println("Roots are"+r1+"and"+r2);
        }
        else
        System.out.println("Roots imaginary & Unequal");
    }
}