[b]Run time error in Invoking Servlet to J2ME tool kit[/b]

Question

I am tried to invoke a servlet to my J2ME tool kit.
invoking will happen when user press command button on
the mobile phone, but when i do this there were run
time error called
"Warning: To avoid potential deadlock, operations that
may block, such asnetworking, should be performed in a
different thread than the commandAction() handler."
There are no compile errors and also i am using Jrun
webserver.
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class ServletInvoke extends MIDlet implements CommandListener
     String url="http://localhost:8100/servlet/HelloServlet";
     private Display dis;
     private Command cmd;
     private Form frm;
     public ServletInvoke()
          dis=Display.getDisplay(this);
     public void startApp()
          frm=new Form("My Project");
          cmd=new Command("Click",Command.SCREEN,2);
          frm.addCommand(cmd);
          frm.setCommandListener(this);
          dis.setCurrent(frm);
     public void pauseApp()
     public void destroyApp(boolean unconditional)
     void invokeServlet(String url)throws IOException
          HttpConnection c=null;
          InputStream is=null;
          StringBuffer b=new StringBuffer ();
          TextBox t=null;
          try
               c=(HttpConnection)Connector.open(url);
               c.setRequestMethod(HttpConnection.GET);
               c.setRequestProperty("IF-Modified-Since","20 Jan 2001 16:19:14 GMT");
               c.setRequestProperty("Content-Language","en-CA");
               is=c.openDataInputStream();
               int ch;
               while((ch=is.read())!=-1)
                    b.append((char)ch);
               t=new TextBox("First Servlet",b.toString(),1024,0);
          finally
               if(is!=null)
                    is.close();
               if(is!=null)
                    c.close();
          dis.setCurrent(t);
     public void commandAction(Command command,Displayable dis)
          if(command==cmd)
               try
                    invokeServlet(url);
               catch(IOException e)
                    System.out.println("IOException"+e);
               //e.printStacktrace();
}PLS if can give me a working sample code as a soluation to above problem.

Answer 1

import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class ServletInvoke extends MIDlet implements CommandListener
     String url="http://localhost:8100/servlet/HelloServlet";
     private Display dis;
     private Command cmd;
     private Form frm;
     public ServletInvoke()
          dis=Display.getDisplay(this);
     public void startApp()
          frm=new Form("My Project");
          cmd=new Command("Click",Command.SCREEN,2);
          frm.addCommand(cmd);
          frm.setCommandListener(this);
          dis.setCurrent(frm);
     public void pauseApp()
     public void destroyApp(boolean unconditional)
     public void commandAction(Command command,Displayable dis)
          if(command==cmd)
               try
               HTTPConnection conn = new HTTPConnection();
               conn.invokeServlet(url);
               catch(IOException e)
                    System.out.println("IOException"+e);
               //e.printStacktrace();
class HTTPConnection extends Thread
     String url = null;
     HTTPConnection()
     void invokeServlet(String url)
          this.url = url;
          start();     
     public void run()
          HttpConnection c=null;
          InputStream is=null;
          StringBuffer b=new StringBuffer ();
          TextBox t=null;
          try
               c=(HttpConnection)Connector.open(url);
               c.setRequestMethod(HttpConnection.GET);
               c.setRequestProperty("IF-Modified-Since","20 Jan 2001 16:19:14 GMT");
               c.setRequestProperty("Content-Language","en-CA");
               is=c.openDataInputStream();
               int ch;
               while((ch=is.read())!=-1)
                    b.append((char)ch);
               t=new TextBox("First Servlet",b.toString(),1024,0);
          finally
               if(is!=null)
                    is.close();
               if(is!=null)
                    c.close();
          dis.setCurrent(t);
}