java 代码无缘无故报错，不知道原因

Question

报错如下

'HttpClient()' has protected access in 'sun.net.www.http.HttpClient'

代码

import sun.net.www.http.HttpClient;
HttpClient client=new HttpClient();
  public String HttpPost(String url, Map<String, String> DataParams, Map<String, String> Headers) throws IOException {
        HttpClient client=new HttpClient();
        return"";
    }

Answer 1

HttpClient的构造函数是protected修饰的，不应该直接实例化，而是使用过HttpClient.New()