URL.openstream doesn't work

Question

Hi,
I run the demo program form java tutorial. Code as below:
import java.net.*;
import java.io.*;
public class urltest {
public static void main(String[] args) throws Exception {
     URL yahoo = new URL("http://www.yahoo.com/");
     BufferedReader in = new BufferedReader(
                    new InputStreamReader(
                    yahoo.openStream()));
     String inputLine;
     while ((inputLine = in.readLine()) != null)
     System.out.println(inputLine);
     in.close();
but it gives the follow output
Exception in thread "main" java.net.NoRouteToHostException: Operation timed out:
no further information
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
at java.net.URL.openStream(Unknown Source)
at urltest.main(urltest.java:30)
Plz advise.

Answer 1

Thx Jean, I modify the OS to Windows 95, but the program still don't work
code:
import java.net.*;
import java.io.*;
public class urltest {
public static void main(String[] args) throws Exception {
     URL yahoo = new URL("http://www.yahoo.com/");
     HttpURLConnection uc = (HttpURLConnection)yahoo.openConnection();
uc.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 5.5; Windows 95)");
uc.setRequestProperty("Connection","Keep-Alive");
uc.setDoOutput(true);
uc.setDoInput(true);
uc.setUseCaches(false);
uc.setRequestMethod("GET");
uc.setFollowRedirects(false);
uc.setInstanceFollowRedirects(false);
     BufferedReader in = new BufferedReader(
                    new InputStreamReader(
                    uc.getInputStream()));
     String inputLine=in.readLine();
     //while ((inputLine = in.readLine()) != null)
     System.out.println(inputLine);
     in.close();
The output is
Exception in thread "main" java.net.NoRouteToHostException: Operation timed out:
no further information
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown So
urce)
at urltest.main(urltest.java:39)
Plz advise