Join 2 Locations With a Particle Line

Hello everyone!
I'm trying to join 2 locations with a particle line, but I'm stuck and I've got no idea how to continue, I've already tried some tutorials, but for most of them you need another API. Heres what I've done up to now:

Code:

    public void path(String[] args, Player player) {

        World w1 = Bukkit.getServer().getWorld(settings.getData().getString("loc." + args[0] + ".world"));
        double x1 = settings.getData().getDouble("loc." + args[0] + ".x");
        double y1 = settings.getData().getDouble("loc." + args[0] + ".y");
        double z1 = settings.getData().getDouble("loc." + args[0] + ".z");
       
        World w2 = Bukkit.getServer().getWorld(settings.getData().getString("loc." + args[0] + ".world"));
        double x2 = settings.getData().getDouble("loc." + args[1] + ".x");
        double y2 = settings.getData().getDouble("loc." + args[1] + ".y");
        double z2 = settings.getData().getDouble("loc." + args[1] + ".z");
       
        Location start = (new Location(w1, x1, y1, z1));
        Location end = (new Location(w2, x2, y2, z2));

        Vector vec = end.subtract(start).toVector();
                  


    }

Thanks for your time