SOCKET NOT WORK PHONE (works on emulator) ,,, freezes at Connector.open

Question

Hi everyone, dukes to those who can ease my brain pain.
I'm using the example SocketMIDlet app that comes with Sun JavaTM Wireless Toolkit for CLDC Version 2.5.
Client and server works ok on emulator.
THEN I attempt running server on PC and Client on Nokia N95.
IP address in Client's Connector.open("socket://...) is the IP address shown when I do IPCONFIG on my PC. My PC is connected to the internet via ADSL router.
When I run the client on the phone, it asks for access point, I select
1) vodafoneLive (i.e. internet access point.) Is this correct? is it possible to socket over the internet (dum question I know) ,,,
or should I connect to
2) my wireless network access point instead (where the pc is connected to)
although that doesnt work either, but just want to know if point 1 is actually possible.
See code below, it seems to be freezing at the Connector.open statement, because the textfield is not even updating with "connected..." and nothing is reported at the server end.
No exceptions are reported.
Tested on Nokia emulator, connected ok, but send from client didnt work, so added a flush statement in, so that's good now. But still, the connect is what is not working.
Anyone come across this before ????
Here is the code... the client and server (2nd and 3rd procs below) are the interesting ones....
Much appreciated if someone can help,,, suspect a setup problem? but who knows...
*PLEASE HELP*
SocketMIDlet.java
{code}
* @(#)SocketMIDlet.java     1.6 03/10/29
* Copyright (c) 2000-2003 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class SocketMIDlet extends MIDlet implements CommandListener {
private static final String SERVER = "Server";
private static final String CLIENT = "Client";
private static final String[] names = {SERVER, CLIENT};
private static Display display;
private Form f;
private ChoiceGroup cg;
private boolean isPaused;
private Server server;
private Client client;
private Command exitCommand = new Command("Exit", Command.EXIT, 1);
private Command startCommand = new Command("Start", Command.ITEM, 1);
public SocketMIDlet() {
display = Display.getDisplay(this);
f = new Form("Socket Demo");
cg = new ChoiceGroup("Please select peer",
Choice.EXCLUSIVE, names, null);
f.append(cg);
f.addCommand(exitCommand);
f.addCommand(startCommand);
f.setCommandListener(this);
display.setCurrent(f);
public boolean isPaused() {
return isPaused;
public void startApp() {
isPaused = false;
public void pauseApp() {
isPaused = true;
public void destroyApp(boolean unconditional) {
if (server != null) {
server.stop();
if (client != null) {
client.stop();
public void commandAction(Command c, Displayable s) {
if (c == exitCommand) {
destroyApp(true);
notifyDestroyed();
} else if (c == startCommand) {
String name = cg.getString(cg.getSelectedIndex());
if (name.equals(SERVER)) {
server = new Server(this);
server.start();
} else {
client = new Client(this);
client.start();
{code}
Server.java
{code}
* @(#)Server.java     1.6 03/07/15
* Copyright (c) 2000-2003 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class Server implements Runnable, CommandListener {
private SocketMIDlet parent;
private Display display;
private Form f;
private StringItem si;
private TextField tf;
private boolean stop;
private Command sendCommand = new Command("Send", Command.ITEM, 1);
private Command exitCommand = new Command("Exit", Command.EXIT, 1);
InputStream is;
OutputStream os;
SocketConnection sc;
ServerSocketConnection scn;
Sender sender;
public Server(SocketMIDlet m) {
parent = m;
display = Display.getDisplay(parent);
f = new Form("Socket Server");
si = new StringItem("Status:", " ");
tf = new TextField("Send:", "", 30, TextField.ANY);
f.append(si);
f.append(tf);
f.addCommand(exitCommand);
f.setCommandListener(this);
display.setCurrent(f);
public void start() {
Thread t = new Thread(this);
t.start();
public void run() {
try {
si.setText("Waiting for connection");
scn = (ServerSocketConnection) Connector.open("socket://:5000");
// Wait for a connection.
sc = (SocketConnection) scn.acceptAndOpen();
si.setText("Connection accepted");
is = sc.openInputStream();
os = sc.openOutputStream();
sender = new Sender(os);
// Allow sending of messages only after Sender is created
f.addCommand(sendCommand);
while (true) {
StringBuffer sb = new StringBuffer();
int c = 0;
while (((c = is.read()) != '\n') && (c != -1)) {
sb.append((char) c);
if (c == -1) {
break;
si.setText("Message received - " + sb.toString());
stop();
si.setText("Connection is closed");
f.removeCommand(sendCommand);
} catch (IOException ioe) {
if (ioe.getMessage().equals("ServerSocket Open")) {
Alert a = new Alert("Server", "Port 9999 is already taken.",
null, AlertType.ERROR);
a.setTimeout(Alert.FOREVER);
a.setCommandListener(this);
display.setCurrent(a);
} else {
if (!stop) {
ioe.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
public void commandAction(Command c, Displayable s) {
if (c == sendCommand && !parent.isPaused()) {
sender.send(tf.getString());
if ((c == Alert.DISMISS_COMMAND) || (c == exitCommand)) {
parent.notifyDestroyed();
parent.destroyApp(true);
* Close all open streams
public void stop() {
try {
stop = true;
if (is != null) {
is.close();
if (os != null) {
os.close();
if (sc != null) {
sc.close();
if (scn != null) {
scn.close();
} catch (IOException ioe) {}
{code}
Client.java
{code}
* @(#)Client.java     1.6 03/07/15
* Copyright (c) 2000-2003 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class Client implements Runnable, CommandListener {
private SocketMIDlet parent;
private Display display;
private Form f;
private StringItem si;
private TextField tf;
private boolean stop;
private Command sendCommand = new Command("Send", Command.ITEM, 1);
private Command exitCommand = new Command("Exit", Command.EXIT, 1);
InputStream is;
OutputStream os;
SocketConnection sc;
Sender sender;
public Client(SocketMIDlet m) {
parent = m;
display = Display.getDisplay(parent);
f = new Form("Socket Client");
si = new StringItem("Status:", " ");
tf = new TextField("Send:", "", 30, TextField.ANY);
f.append(si);
f.append(tf);
f.addCommand(exitCommand);
f.addCommand(sendCommand);
f.setCommandListener(this);
display.setCurrent(f);
* Start the client thread
public void start() {
Thread t = new Thread(this);
t.start();
public void run() {
try {
sc = (SocketConnection) Connector.open("socket://155.35.122.238:5000");
si.setText("Connected to server");
is = sc.openInputStream();
os = sc.openOutputStream();
// Start the thread for sending messages - see Sender's main
// comment for explanation
sender = new Sender(os);
// Loop forever, receiving data
while (true) {
StringBuffer sb = new StringBuffer();
int c = 0;
while (((c = is.read()) != '\n') && (c != -1)) {
sb.append((char) c);
if (c == -1) {
break;
// Display message to user
si.setText("Message received - " + sb.toString());
stop();
si.setText("Connection closed");
f.removeCommand(sendCommand);
} catch (ConnectionNotFoundException cnfe) {
Alert a = new Alert("Client", "Please run Server MIDlet first",
null, AlertType.ERROR);
a.setTimeout(Alert.FOREVER);
a.setCommandListener(this);
display.setCurrent(a);
} catch (IOException ioe) {
if (!stop) {
Alert a = new Alert("Client", "Franco IOException: " + ioe.toString(),
null, AlertType.ERROR);
a.setTimeout(Alert.FOREVER);
a.setCommandListener(this);
display.setCurrent(a);
ioe.printStackTrace();
} catch (Exception e) {
Alert a = new Alert("Client", "Franco Exception: " + e.toString(),
null, AlertType.ERROR);
a.setTimeout(Alert.FOREVER);
a.setCommandListener(this);
display.setCurrent(a);
e.printStackTrace();
public void commandAction(Command c, Displayable s) {
if (c == sendCommand && !parent.isPaused()) {
sender.send(tf.getString());
if ((c == Alert.DISMISS_COMMAND) || (c == exitCommand)) {
parent.notifyDestroyed();
parent.destroyApp(true);
* Close all open streams
public void stop() {
try {
stop = true;
if (sender != null) {
sender.stop();
if (is != null) {
is.close();
if (os != null) {
os.close();
if (sc != null) {
sc.close();
} catch (IOException ioe) {}
{code}
Sender.java
{code}
* @(#)Sender.java     1.4 03/03/02
* Copyright (c) 2000-2003 Sun Microsystems, Inc. All rights reserved.
* PROPRIETARY/CONFIDENTIAL
* Use is subject to license terms
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class Sender extends Thread {
private OutputStream os;
private String message;
public Sender(OutputStream os) {
this.os = os;
start();
public synchronized void send(String msg) {
message = msg;
notify();
public synchronized void run() {
while(true) {
// If no client to deal, wait until one connects
if (message == null) {
try {
wait();
} catch (InterruptedException e) {
if (message == null) {
break;
try {
os.write(message.getBytes());
os.write("\r\n".getBytes());
os.flush();
} catch (IOException ioe) {
ioe.printStackTrace();
// Completed client handling, return handler to pool and
// mark for wait
message = null;
public synchronized void stop() {
message = null;
notify();
{code}

Answer 1

ok, apologies to anyone who has read this and gotten a headache from my stupidity... testing with a work collegue, who you can guess called me an idiot, advised that I was trying to use the ip address as known within my home lan, and that I needed to use the ipaddress as seen externally.
So, looked at my linksys router admin and found the external ip address. Tested pinging to it, all good. BUT, cannot telnet to that ipaddress port of the java server running on the pc.
So at this point, the problem is not j2me related.... have started another thread to look at THAT problem, when that is solved, I'm sure there will STILL be problems here, or maybe not... so once that link is addressed, I'll come back here.