我现在知道错误在时间和距离都为0 我应该怎么修改？

import java.util.Scanner;
public class WorldDistance {

public enum Planet {
    MERCURY (2.4397e6),
    VENUS   (6.0518e6),
    EARTH   (6.37814e6),
    MARS    (3.3972e6),
    JUPITER (7.1492e7),
    SATURN  (6.0268e7),
    URANUS  (2.5559e7),
    NEPTUNE (2.4746e7);

    public final double radius; //in metres
    
    Planet(double radius) {
        this.radius = radius;
    }
    
    public String toString() {
        String original = name();
        return original.charAt(0) + original.substring(1).toLowerCase();
    }
}

private static boolean inRange(int value, int low, int high) {
    return value > low && value < high;
}

public static Planet selectPlanet(Scanner in) {
    Planet[] options = Planet.values();
    int selected;
    
    do {
        System.out.println("On which planet?");
        for (int i = 0; i < options.length; i++) {
            System.out.println((i + 1) + ". " + options[i]);
        }
        System.out.print("Enter choice: ");
        selected = in.nextInt();
        if (! inRange(selected, 1, options.length)) {
            System.err.println("Invalid selection\n");
        }
    } while (! inRange(selected, 1, options.length));
    
    return options[selected];
}    

public static double worldDistance(double lat1, double long1, double lat2,
                                   double long2, final double radius)
{
    double a;
    
    a = Math.pow(Math.sin(Math.toRadians(lat2 - lat1)/2), 2) +
        Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
        Math.pow(Math.sin(Math.toRadians(long2 - long1)/2), 2);
    
    return Math.round(2*radius * Math.atan2(Math.sqrt(a), Math.sqrt(1-a))/1000);
}

public static double euclideanDistance(double x1, double y1,
                                       double x2, double y2)
{
    return Math.hypot(x1 - x2, y1 - y2);
}

public static String formatTime(double hours) {
    long h = Math.round(Math.floor(hours));
    return String.format("%d hours %d minutes", h, Math.round(60*(hours - h)));
}

public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    String origin, destination;
    double lat1, long1, lat2, long2;
    Planet where;
    double distance;
    double speed;
    
    System.out.println("Travel Distance & Time Calculator");
    System.out.println();
    System.out.print("Enter origin: ");
    origin = in.next();
    System.out.print("Enter destination: ");
    destination = in.next();
    System.out.println("Enter their respective latitude and longitude coordinates " +
                    "as decimal values,\nseparated by spaces (e.g., " + 
                    "write 42°30'00\"S as -42.5): ");
    
    lat1 = in.nextDouble();
    long1 = in.nextDouble();
    lat2 = in.nextDouble();
    long2 = in.nextDouble();
    
    System.out.println();
    where = selectPlanet(in);
    
    distance = worldDistance(lat1, long1, lat1, long1, where.radius);
    
    System.out.println();
    System.out.print("Enter average speed over the ground (km/h): ");
    speed = in.nextDouble();
  
    System.out.println();
    System.out.println("Shortest distance from " + origin + " to " + destination +
                       " on " + where + ": " + distance + " km");
    System.out.println("Minimum travel time: " + formatTime(distance / speed) + "*");
    System.out.println("*Ignores gravitational and atmospheric effects");
}

}

问题在于结果"距离"和"时间"都是0