Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static double distFrom(double lat1, double lng1, double lat2, double lng2) {
        double earthRadius = 3958.75;
        double dLat = Math.toRadians(lat2 - lat1);
        double dLng = Math.toRadians(lng2 - lng1);
        double sindLat = Math.sin(dLat / 2);
        double sindLng = Math.sin(dLng / 2);
        double a = Math.pow(sindLat, 2)
                + Math.pow(sindLng, 2) * Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2));
        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        double dist = earthRadius * c;

        if (dist >= 1000) {
            int distInInt = (int) dist;
            dist = (int) distInInt;
        } else if (dist >= 100) {
            dist = (((int) (dist * 10)) / 10.0);
        } else {
            dist = (((int) (dist * 100)) / 100.0);
        }
        return dist;
    }
}