public String BuildString(World world, int x, int y, int z) {
        if (world.getBlockAt(x, y, z).getState() instanceof Sign) {
            if (string.length() > 0) {
                string.delete(0, string.length());
            }
            string.append(world.getName());
            string.append(":");
            string.append(x);
            string.append(",");
            string.append(y);
            string.append(",");
            string.append(z);
        }
        return string.toString();
    }