android studio上的NetworkOnMainThreadException

Question

我试图通过android studio在java上发送一个http请求，它给了我标题中的错误，基本上该程序捕获程序，任何人都可以帮助我

P.S我向用户提供了互联网访问权限

public class reader{
public static String get = null;
public static void run(){
    try {
        URL oracle = new URL("http://www.oracle.com/");
        BufferedReader in = new BufferedReader(
                new InputStreamReader(oracle.openStream()));
        String inputLine;
        while ((inputLine = in.readLine()) != null) {
            Log.d("Ron", inputLine);
            get += inputLine;
        }
        in.close();
    }catch(Exception e){
        Log.d("Ron" , e.toString());
    }
}