Closest java in pgm

Closest.java

public class Closest

{

    public static void main(String[] args)

   {

        double x = Double.parseDouble(args[0]);

        double y = Double.parseDouble(args[1]);

        double z = Double.parseDouble(args[2]);

        double bestx = Double.NaN;

        double besty = Double.NaN;

        double bestz = Double.NaN;

        double bestDist2 = Double.POSITIVE_INFINITY;

        while (!StdIn.isEmpty())

        {

            double xi = StdIn.readDouble();

            double yi = StdIn.readDouble();

            double zi = StdIn.readDouble();

         double dist2 = (x - xi) * (x - xi) + (y - yi) * (y - yi) + (z - zi) * (z - zi);

            if (dist2 < bestDist2)

            {

                bestx = xi;

                besty = yi;

                bestz = zi;

                bestDist2 = dist2;

            }

        }

                        StdOut.printf("Closest point = (%f, %f, %f)\n", bestx, besty, bestz);

    }

}