Java程序可ping数千个URL

我想编写一个程序来ping至少10000个URL。我写了一个小程序，发现它没有我预期的那么快。

对100个网址执行Ping操作需要3-4分钟。

有人有任何建议以更好的方式做到这一点。

private static Map<String, String> findUnreachableUrls(Set urls) { Map<String, String> badUrls = new TreeMap<>(); for (String url : urls) { HttpURLConnection connection; try { connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("HEAD"); connection.connect(); int responseCode = connection.getResponseCode(); if (responseCode != 200 || responseCode != 302) { badUrls.put(url, Integer.toString(responseCode)); } } catch (IOException e) { badUrls.put(url, e.getMessage()); }

    }
    return badUrls;
}