network programming - Java program does not connect to internet? -

this program compiles when try run program gives me errors.

import java.io.bufferedreader; import java.io.bufferedwriter; import java.io.filewriter; import java.io.inputstreamreader; import java.net.url;  public class main {    public static void main(string[] args)     throws exception {       url url = new url("http://www.google.com");       bufferedreader reader = new bufferedreader       (new inputstreamreader(url.openstream()));       bufferedwriter writer = new bufferedwriter       (new filewriter("data.html"));       string line;       while ((line = reader.readline()) != null) {          system.out.println(line);          writer.write(line);          writer.newline();       }       reader.close();       writer.close();    } } 

the following error occurs (i have attached image):

screenshot of errors

i behind proxy server. make problem in connecting internet? if please post solution .. in advance.

you should similar:

1st of put proxy information system properties:

system.getproperties().put( "proxyset", "true" ); system.getproperties().put( "proxyhost", "proxy_hostname" ); system.getproperties().put( "proxyport", "8080" ); // or other proxy port 

and need authentication on proxy, using similar:

url url = new url("http://www.google.com"); urlconnection con = url.openconnection(); string pass = "my_username:my_pass"; string encodedpass = base64encode( pass ); con.setrequestproperty( "proxy-authorization", encodedpass ); 

good luck.