Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

public class Main {
    public static double distanceFrom(double lat1, double lng1, double lat2, double lng2) {
        // Implementation of the Haversine distance formula
        lat1 = Math.toRadians(lat1);
        lng1 = Math.toRadians(lng1);
        lat2 = Math.toRadians(lat2);
        lng2 = Math.toRadians(lng2);

        double dlon = lng2 - lng1;
        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.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        return 3958.75 * c; // 3958: Earth radius in miles
    }
}