J2ME socket connection

emee

Hi all,
I have written simple client/server applications - the client application in J2ME and the server application in J2SE.

I have tested the J2ME code on an emulator and it worked fine - it could connect to the server and could send strings to the server.

Now that I have downloaded the client application onto my mobile phone - a nokia 6020 - it is not longer able to connect to the server it gives me the following error

"java.io.IOException: error occurred whilst opening connection"

does anyone know what the problem might be with making this connection?

any help would be really appreciated!

Thanks,
Emer

madramor

1:
You could have a firewall on your server

2:
You could be using the computer name rather than the ip address

emee

Hi,
Thanks for replying,

I thought myself it might be the firewall the first time i tried to connect but after turning off the firewall it still wouldn't connect.

I got the IP address by doing an ipconfig on my computer that should give me the right one shouldn't it?

Any other ideas?

Thanks,
Emer

aidan_walsh

What are you using as a gateway between the phone and the server? If you're just going through your mobile provider, you're not going to be able to see a private range IP address.

emee

Hi Aidan,

Ya i'm just using the mobile provider to access the server.... i didn't think there'd be a problem doing this

any suggestions about how to get around this?

Thanks,
Emer

aidan_walsh

emee wrote:

Hi Aidan,

Ya i'm just using the mobile provider to access the server.... i didn't think there'd be a problem doing this

any suggestions about how to get around this?

Thanks,
Emer

See if the college (?) has access to a small, local mobile pone service box. This will let you set up a short range network that you can connect to as though you were connected to your regular provider. Put this on the same network as the server and you should be able to access it once you configure your phone properly.

If they don't, see if you can get a static public IP address off your administrator that can map to a static private IP, which you will give to the server. Use this public IP to connect to the computer.

Failing that, you might have to look into a public shell account that will let you run Java programs on their machines.

emee

crap i was hopin it'd just work by itself by some miracle thanks a million for your help i guess its back to the drawing board for me!

Surrender

I'm running into the exact same issue as emee but I've configured my home wireless router to allow traffic through on a specified port.
I'm using my public ip address (89.234.....) to connect to the PC as well.
If anyone can help with this I'd really appreciate it as I'm sick to death of this.

MiguelBarcelo

emee wrote: »

Hi all,
I have written simple client/server applications - the client application in J2ME and the server application in J2SE.

I have tested the J2ME code on an emulator and it worked fine - it could connect to the server and could send strings to the server.

Now that I have downloaded the client application onto my mobile phone - a nokia 6020 - it is not longer able to connect to the server it gives me the following error

"java.io.IOException: error occurred whilst opening connection"

does anyone know what the problem might be with making this connection?

any help would be really appreciated!

Thanks,
Emer

Hi emee.
Sorry, I need your help in simple client (J2ME)/server(J2SE) applications.
Do I should use Sockets? I need you to show me the way.
Thank you very much.

Sparks

MiguelBarcelo wrote: »

Hi emee.
Sorry, I need your help in simple client (J2ME)/server(J2SE) applications.
Do I should use Sockets? I need you to show me the way.
Thank you very much.

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