/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.net;import java.net.*;import java.io.*;import java.util.Date;/** * A class that displays information about a URL. **/public class GetURLInfo {    /** Use the URLConnection class to get info about the URL */    public static void printinfo(URL url) throws IOException {        URLConnection c = url.openConnection();  // Get URLConnection from URL        c.connect();                             // Open a connection to URL	        // Display some information about the URL contents        System.out.println("  Content Type: " + c.getContentType());        System.out.println("  Content Encoding: " + c.getContentEncoding());        System.out.println("  Content Length: " + c.getContentLength());        System.out.println("  Date: " + new Date(c.getDate()));        System.out.println("  Last Modified: " +new Date(c.getLastModified()));        System.out.println("  Expiration: " + new Date(c.getExpiration()));	        // If it is an HTTP connection, display some additional information.        if (c instanceof HttpURLConnection) {            HttpURLConnection h = (HttpURLConnection) c;            System.out.println("  Request Method: " + h.getRequestMethod());            System.out.println("  Response Message: " +h.getResponseMessage());            System.out.println("  Response Code: " + h.getResponseCode());        }    }        /** Create a URL, call printinfo() to display information about it. */    public static void main(String[] args) {        try { printinfo(new URL(args[0])); }        catch (Exception e) {            System.err.println(e);            System.err.println("Usage: java GetURLInfo <url>");        }    }}