此段代码还需如何重构

Question

public class RealTimeDeleteSearchInfo {
    private static final String HTTP_POST = "POST";
    private final HttpURLConnection httpurlconnection = null;
    public void realTimeDeleteSeachInfo(String[] infoIds) throws Exception {
        URL url = null;
        for (int i = 0; i < infoIds.length; i++) {
            String deleteInfo = searchURL(infoIds[i]);
            url = new URL(deleteInfo);
            crossDomainDeleteInfoSearch(url, httpurlconnection, deleteInfo);
        }
    }
    
    private String searchURL(String infoId) {
        String deleteInfo = CebCmsBizUtil.delete_interface;
        return deleteInfo.replace("$param", infoId);
    }    private void crossDomainDeleteInfoSearch(URL url, HttpURLConnection httpurlconnection, String deleteInfo)
            throws Exception {
        httpurlconnection = (HttpURLConnection) url.openConnection();
        httpurlconnection.setDoOutput(true);
        httpurlconnection.setRequestMethod(HTTP_POST);
        httpurlconnection.getResponseCode();
    }
}

Answer 1

能不能解释下这句
private final HttpURLConnection httpurlconnection = null;
吧httpurlconnection 初始化为 null 却又是final不让修改 
主要是做什么呢

Answer 2

还谈不上到重构的层次，你变量的作用范围弄得就不对！HttpURLConnection 设成成员变量的理由是什么？