求根号5的值--用java实现

public class Math {
 public static void main(String[] args) {
  double a=0.0001;
  double result ;
  for (double i=2.0;i<=5.0;i+=a) {
   result=i*i;
   double b=5.0-a;
   if ((result>=b)&&result<=5+2*a){
    System.out.println(i);
   }
     }
 }
}