Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    final static double RADIAN = 0.01745329;
    final static int EARTH_RADIUS = 6371000;

    public static double distanceTo(double fromLat, double fromLng, double toLat, double toLng) {

        double fromLatRad = calculateRadian(fromLat);
        double fromLngRad = calculateRadian(fromLng);
        double toLatRad = calculateRadian(toLat);
        double toLngRad = calculateRadian(toLng);

        return EARTH_RADIUS * (Math.PI / 2 - Math.asin(Math.sin(fromLatRad) * Math.sin(toLatRad)
                + Math.cos(fromLngRad - toLngRad) * Math.cos(toLatRad) * Math.cos(fromLatRad)));
    }

    public static double calculateRadian(double value) {
        return value * RADIAN;
    }
}