HttpURLConnection.HTTP_NOT_MODIFIED has the following syntax.
public static final int HTTP_NOT_MODIFIED
In the following code shows how to use HttpURLConnection.HTTP_NOT_MODIFIED field.
import java.net.HttpURLConnection; import java.net.URL; /* w ww .jav a 2s . c om*/ 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_NOT_MODIFIED); } }