Get the document Last-modified date : HttpURLConnection « Network « Java Tutorial

1. Java Tutorial
2. Network
3. HttpURLConnection

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();

    long date = httpCon.getLastModified();
    if (date == 0)
      System.out.println("No last-modified information.");
    else
      System.out.println("Last-Modified: " + new Date(date));

 }
}