Gary,
Thank you so much for your help. All the connections are
working now.
=
Aluizio
[EMAIL PROTECTED] wrote:
>
> Aluizio,
>
> One thing that I know that changed in JDK1.2 is the security model. Just
> about any access to a resource (ie files, sockets, etc.) must be explicitly
> enabled in the Java policy file (jdk1.2/jre/lib/security/java.policy). This is
> documented under the JDK1.2/docs/guide/security/*.html. The error message
> "Couldn't get I/O for the connection to .." is coming from your code where you
> catch IOException. If you add something like:
>
> System.err.println( "IOException: ", e.getMessage() );
> e.printStackTrace() ;
>
> Then, you will get more information about why the socket connection failed.
> In particular it will tell you if any permissions are lacking, and then you can
> grant them in your java.policy file.
>
> HTH,
> -Gary
>
> Aluizio Arcela <[EMAIL PROTECTED]> on 04/12/99 05:49:51 PM
> To: [EMAIL PROTECTED]
> cc: (bcc: Gary Moss/arl)
> Subject: [java3d] Sockets and Java3D
>
> We are writing a distributed application for a sound & image
> experiment where a client computer is to be connected to both a
> graphical server and to a MIDI server. We are trying to write
> the graphical service by using Java 3D in its immediate mode.
>
> But we have faced to the following basic problem: the program's
> connection segment which was running OK in JDK1.1 fails if the
> program is compiled with JDK1.2. Even the code available in the
> documentation fails as described below.
>
> The example in the section "Reading and Writing to a Socket" of
> the Java tutorial
>
> (which is found at the address:
>
> http://java.sun.com/docs/books/tutorial/networking/sockets/readingWriting.html
> )
>
> runs OK when compiled with Symantec Visual Cafe 2.5, but the same
> is not true when the example is compiled with JDK1.2. In this case
> the connection is not successful, according to the output "Couldn't
> get I/O for the connection to: 164.41.14.70".
>
> Is there any problem with sockets in JDK1.2? Are we missing any detail?
>
> Thanks in advance.
>
> Aluizio Arcela
> Multimedia Computing Lab
> University of Brasilia
>
> --------------------------------------------
> import java.io.*;
> import java.net.*;
>
> public class EchoClient {
> public static void main(String[] args) throws IOException
> {
>
> Socket echoSocket = null;
> PrintWriter out = null;
> BufferedReader in = null;
>
> try {
> echoSocket = new Socket("164.41.14.70", 2000);
> out = new
> PrintWriter(echoSocket.getOutputStream(), true);
> in = new BufferedReader(new
> InputStreamReader(echoSocket.getInputStream()));
> System.err.println("Connected to 164.41.14.70");
> } catch (UnknownHostException e) {
> System.err.println("Don't know about host:
> 164.41.14.70.");
> System.exit(1);
> } catch (IOException e) {
> System.err.println("Couldn't get I/O for the
> connection to: 164.41.14.70.");
> System.exit(1);
> }
>
> BufferedReader stdIn = new BufferedReader(new
> InputStreamReader(System.in));
> String userInput;
>
> while ((userInput = stdIn.readLine()) != null) {
> out.println(userInput);
> System.out.println("echo: " + in.readLine());
> }
>
> out.close();
> in.close();
> stdIn.close();
> echoSocket.close();
> }
> }
>
> ------------
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