HttpURLConnection: getContentLength()

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

public class Main{
  public static void main(String args[]) throws Exception {
    URL url = new URL("http://www.google.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();


    int len = httpCon.getContentLength();
    if (len == -1)
      System.out.println("Content length unavailable.");
    else
      System.out.println("Content-Length: " + len);
 }
}