如何使用Java测试带有lat/lon和radius的区域内的点？

public class Area {
    private double lat;
    private double lon;
    private double radius;

    // 构造函数
    public Area(double lat, double lon, double radius) {
        this.lat = lat;
        this.lon = lon;
        this.radius = radius;
    }

    // Getter和Setter方法
    // ...
}

public boolean isPointInArea(double pointLat, double pointLon, Area area) {
    double earthRadius = 6371; // 地球半径，单位为千米

    double latDistance = Math.toRadians(area.getLat() - pointLat);
    double lonDistance = Math.toRadians(area.getLon() - pointLon);

    double a = Math.sin(latDistance / 2) * Math.sin(latDistance / 2)
            + Math.cos(Math.toRadians(pointLat)) * Math.cos(Math.toRadians(area.getLat()))
            * Math.sin(lonDistance / 2) * Math.sin(lonDistance / 2);

    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));

    double distance = earthRadius * c;

    return distance <= area.getRadius();
}

public class Main {
    public static void main(String[] args) {
        Area area = new Area(37.7749, -122.4194, 10); // 创建一个区域，中心点为旧金山的经纬度，半径为10千米

        double pointLat = 37.7749;
        double pointLon = -122.4194;

        boolean isInArea = isPointInArea(pointLat, pointLon, area);
        System.out.println("Is point in area? " + isInArea);
    }
}