Finding The Roots Of a Quadratic Equation

class Root 
             {
 public static void main(String[] args) 
 {
  int d=0;
  double r1=0,r2=0;
  int a=Integer.parseInt(args[0]);
          int b=Integer.parseInt(args[1]);
  int c=Integer.parseInt(args[2]);
  d=((b*b)-(4*a*c));
  if(d==0)
  {
              System.out.println("roots are real and equal");
   r1=(-b)/(2*a);
   r2=(-b)/(2*a);
       System.out.println(r1);
   System.out.println(r2);
          }
  else if(d>0)
  {
   System.out.println("roots are real and distinct");
   r1=(-b+Math.sqrt(d))/(2*a);
   r2=(-b-Math.sqrt(d))/(2*a);
   System.out.println(r1);
   System.out.println(r2);
  }
  else
          {
   System.out.println("no real solutions");
  }

 }
}