HttpURLConnection.HTTP_OK


import java.net.HttpURLConnection;
import java.net.URL;

public class Main {
  public static void main(String[] argv) throws Exception {
    HttpURLConnection.setFollowRedirects(false);
    HttpURLConnection con = (HttpURLConnection) new URL("http://www.google.coom").openConnection();
    con.setRequestMethod("HEAD");
    System.out.println(con.getResponseCode() == HttpURLConnection.HTTP_OK);
  }
}
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HttpURLConnection:
  1. HttpURLConnection
  2. HttpURLConnection.HTTP_OK
  3. HttpURLConnection: getContentLength()
  4. HttpURLConnection: getContentType()
  5. HttpURLConnection: getDate()
  6. HttpURLConnection: getExpiration()
  7. HttpURLConnection: getHeaderFields()
  8. HttpURLConnection: getInputStream()
  9. HttpURLConnection: getLastModified()
  10. HttpURLConnection: getRequestMethod
  11. HttpURLConnection: getResponseCode()
  12. HttpURLConnection: getResponseMessage()
  13. HttpURLConnection: setInstanceFollowRedirects(boolean followRedirects)
  14. HttpURLConnection: setRequestMethod(String method) throws ProtocolException
  15. HttpsURLConnection: getDefaultSSLSocketFactory()