Coordinates

/** Coordinates Class
 * v 1.0
 * @author Thibaut Vercueil
 *
 */


public class Coordinates {
    private double lat;
    private double lng;

    /**
     * Constructor
     * @param lat
     * @param lng
     */
    public Coordinates(double lat, double lng){
        this.lat = lat;
        this.lng = lng;
    }

    /**
     * Getter
     * @return current latitude
     */
    public double getLat(){
        return this.lat;
    }

    /**
     * Getter
     * @return current longitude
     */
    public double getLng(){
        return this.lng;
    }

    /**
     * Setter
     * @param l latitude
     */
    public void setLat(double l){
        this.lat = l;
    }


    /**
     * Setter
     * @param l longitude
     */
    public void setLng(double l){
        this.lng = l;
    }

    public double getDistance(Coordinates C){
        //Converting into Radian
        double phi1 = (this.lat * Math.PI) / 180;
        double lambda1 = (this.lng * Math.PI) / 180;

        double phi2 = (C.getLat() * Math.PI) / 180;
        double lambda2 = (C.getLng() * Math.PI) / 180;

        //Applying the magic formula
        return Math.acos(Math.sin(phi1)*Math.sin(phi2) + Math.cos(phi1)*Math.cos(phi2)*Math.cos(lambda2 - lambda1))*6371000;

    }
}