Program for distance between two points on earth

 // Java program to calculate Distance Between

// Two Points on Earth

import java.util.*;

import java.lang.*;

 

class GFG {

 

    public static double distance(double lat1,

                     double lat2, double lon1,

                                  double lon2)

    {

 

        // The math module contains a function

        // named toRadians which converts from

        // degrees to radians.

        lon1 = Math.toRadians(lon1);

        lon2 = Math.toRadians(lon2);

        lat1 = Math.toRadians(lat1);

        lat2 = Math.toRadians(lat2);

 

        // Haversine formula

        double dlon = lon2 - lon1;

        double dlat = lat2 - lat1;

        double a = Math.pow(Math.sin(dlat / 2), 2)

                 + Math.cos(lat1) * Math.cos(lat2)

                 * Math.pow(Math.sin(dlon / 2),2);

             

        double c = 2 * Math.asin(Math.sqrt(a));

 

        // Radius of earth in kilometers. Use 3956

        // for miles

        double r = 6371;

 

        // calculate the result

        return(c * r);

    }

 

    // driver code

    public static void main(String[] args)

    {

        double lat1 = 53.32055555555556;

        double lat2 = 53.31861111111111;

        double lon1 = -1.7297222222222221;

        double lon2 = -1.6997222222222223;

        System.out.println(distance(lat1, lat2,

                           lon1, lon2) + " K.M");

    }

}

 

// This