My j2me program hangs --need help

Question

hi.my program hangs whenever i run my midlet and i get a message like this
Warning: To avoid potential deadlock, operations that may block, such as
networking, should be performed in a different thread than the
commandAction() handler.
below is my codes
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.io.file.*;
import javax.microedition.io.*;
public class TCPClient extends MIDlet implements CommandListener ,ItemCommandListener {
private Display display;
private Form form;
private Command exit,set;
private TextField txtField;
private ChoiceGroup sImage;
private int sIndex;
private String strTxtField;
private Image image;
public TCPClient(){
display=Display.getDisplay(this);
form=new Form("TCPClient");
txtField=new TextField("type what u want to send",null,30,TextField.ANY);
sImage= new ChoiceGroup("pls select", Choice.EXCLUSIVE);
sImage.append("no image",null); //=0
sImage.append("image",null);  //=1
exit=new Command("Exit",Command.EXIT,1);             //1= highest priority,
form.append(txtField);
form.append(sImage);
form.addCommand(exit);
form.setCommandListener(this);
try{
     Image image= Image.createImage("/send.jpg");
     ImageItem imageItem=new ImageItem(null,image,Item.LAYOUT_CENTER ,null,Item.BUTTON);
     set =new Command("Set", Command.ITEM, 1);
     imageItem.setDefaultCommand( set);
     imageItem.setItemCommandListener(this);
     form.append(imageItem);
     }//end of try
catch(IOException e){System.out.println("button error");}
     }// end of constructor
public void startApp(){
System.out.println("midlet started");
ItemStateListener listener = new MyStateListener();
form.setItemStateListener(listener);// register for events
        display.setCurrent(form);
public void pauseApp(){}
public void destroyApp(boolean unconditional){}
public void commandAction(Command c, Displayable s){
if(c==exit){
          destroyApp(false);
          notifyDestroyed();
}  // end of commandAction
public void commandAction(Command c, Item item){
if(c==set){
     strTxtField=txtField.getString();
System.out.println(strTxtField);
try {
                  String filename = "file:///root1/commands.txt";
                          byte[] data = strTxtField.getBytes();
                FileConnection filecon = (FileConnection)Connector.open(filename,Connector.READ_WRITE);
                // Always check whether the file or directory exists.
                if(!filecon.exists()) {
                   filecon.create();
                    OutputStream outputStream = filecon.openOutputStream();
                                       outputStream.write(data);
                                       outputStream.close();
                filecon.close();
             } catch(IOException ioe) {
           }//end of set
}//emd of commandAction method
     private class MyStateListener implements ItemStateListener
                 boolean pictureIsShown=false; //Remember the state
                    int pictureIndex; //Remember the index
                 public void itemStateChanged(Item item)
                         if(item==sImage){
                              sIndex=sImage.getSelectedIndex();
                              switch(sIndex){
                                   case 0:System.out.println(sIndex);
                                          if (!pictureIsShown){
                                                    form.delete(pictureIndex);}
                                  break; // end of case0
                                   case 1:System.out.println(sIndex);
                                   if (!pictureIsShown){
                                       try{
                                         ImageItem logo= new ImageItem("",Image.createImage ("/misa.jpg"),      ImageItem.LAYOUT_CENTER,"");
                                   pictureIndex=form.append(logo);
                                   System.out.println("success");
                                   catch(IOException e)
                                   {System.out.println("error");}}//end of if
                                   break;
                            default: System.out.println("kiss my ___");
                                   }//end of switch
                              }//end of if
                            //do something
                 }//donttouch
}whenever it runs,it would hangs if i enable it to read my codes.
any help/advise is greatly appreciate.thanks

Answer 1

Hi
Use thread while creating a connection -
http://forum.java.sun.com/thread.jspa?threadID=5119680
Check this link, ll get an idea - how you can use thread?
Rohan Chandane