Error in socket streaming

Question

Hi to all,
I develop an application in which server(computer) and client (mobile) interact with each other. I run that code on the emulator it works fine.
But on the device (6681) it didn't works..
code is:
Server: mobile_server.cpp
Header File Included
#include "server_class.cpp"
#include <winsock2.h>
#include <stdio.h>
#include <conio.h>
#include <windows.h>
#include <string.h>
#include <iostream>
#include <fstream>
#include <process.h>
using namespace std;
char buff[200];
int main()
Creating Socket remotesocket1 on the port 5000.
printf("accepting from mobile");
remotesocket1=Accept_Client_Connection(); // Accept Connection from client
printf("accepting from mobile");
printf("\n\t Sending.......");
// Send data to mobile
send( remotesocket, send_data, strlen(send_data), 0 );
//data send successfully to mobile
sz = recv( remotesocket, rec, sizeof(rec), 0 );
// This function blocks and doesn't work
send( remotesocket, send_data, strlen(send_data), 0 );
//data send successfully to mobile
sz = recv( remotesocket, rec, sizeof(rec), 0 );
closesocket(remotesocket1);
return 0;
Client..........
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class socket extends MIDlet
// StreamConnection allows bidirectional communication
private StreamConnection streamConnection = null;
// use OutputStream to send requests
private OutputStream outputStream = null;
private DataOutputStream dataOutputStream = null;
// use InputStream to receive responses from Web server
private InputStream inputStream = null;
private DataInputStream dataInputStream = null;
// specify the connect string
private String connectString = "socket://219.91.231.122:5000";
// use a StrignBuffer to store the retrieved page contents
private StringBuffer results;
private StringBuffer results_size;
private StringBuffer ImgData;
private String size;
Image im = null;
// define GUI components
private Display myDisplay = null;
private Form resultScreen;
private StringItem resultField;
private Form resultScreen1;
public socket()
// initializing GUI display
results = new StringBuffer();
results_size = new StringBuffer();
ImgData=new StringBuffer();
myDisplay = Display.getDisplay(this);
resultScreen = new Form("test:");
public void startApp()
try {
// establish a socket connection with remote server
System.out.println("Wating for connection ........");
streamConnection =(StreamConnection) Connector.open(connectString);
System.out.println("connection Established........");
inputStream = streamConnection.openInputStream();
dataInputStream = new DataInputStream(inputStream);
outputStream = streamConnection.openOutputStream();
int inputChar;
while (true)
inputChar = dataInputStream.read();
if(inputChar=='d')
{           break;              }
results.append((char) inputChar);
resultScreen.append("r");
resultScreen.append(results.toString());
myDisplay.setCurrent(resultScreen);
resultScreen.append("sending ack........");
myDisplay.setCurrent(resultScreen);
outputStream.write("OK".getBytes());
resultScreen.append("sending ack........ snded");
myDisplay.setCurrent(resultScreen);
resultScreen.append("reading................");
while ( true )
resultScreen.append("reading");
myDisplay.setCurrent(resultScreen);
// Upto this it works fine...........................
inputChar = dataInputStream.read();
if(inputChar=='d')
{      break;                  }
results.append((char) inputChar);
resultScreen.append("r");
resultScreen.append(results.toString());
myDisplay.setCurrent(resultScreen);
outputStream.write("OK".getBytes());
resultField = new StringItem(null, results.toString());
//resultScreen.append(resultField);
myDisplay.setCurrent(resultScreen);
} catch (IOException e)
System.err.println("Exception caught:" + e);
} finally {
// free up I/O streams and close the socket connection
try {
if (dataInputStream != null)
dataInputStream.close();
} catch (Exception ignored) {}
try {
if (dataOutputStream != null)
dataOutputStream.close();
} catch (Exception ignored) {}
try {
if (outputStream != null)
outputStream.close();
} catch (Exception ignored) {}
try {
if (inputStream != null)
inputStream.close();
} catch (Exception ignored) {}
try {
if (streamConnection != null)
streamConnection.close();
} catch (Exception ignored) {}
public void pauseApp() {
public void destroyApp(boolean unconditional) {
}

Answer 1

hi, i newbie in java and still learning. can anyone help me. i'll try to run examples for the java sun websites in the tutorial. i can run the server program but when i'll run the client program. the output said uknown host. what should i do? please reply as soon as possible. thank you :).
i run server then client program like the tutorial said.
thank you