Java.lang exception package/simpleForm. init ()

Question

hi;
I am learning j2me. and i used Nokia feature pack 2, S60 emulator. I created simple application for test and i got java.lang exception. package/simpleform.<init>().
I wasted all my time on this. and search for help. I think my method of developing is right but i dont know what problem is plz help me.
Can any one advise me well know book for j2me developing
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
* @author Kami
public class SimpleForm extends MIDlet implements CommandListener {
Form frm ;
Display display;
Command Exit_cmd= new Command("Exit",Command.EXIT,1);
// Command Ok_cmd= new Command("Ok",Command.OK,1);
public void startApp() {
display= Display.getDisplay(this);
frm= new Form("First Form");
frm.append("This is Sample Form;");
// frm.addCommand(Ok_cmd);
frm.addCommand(Exit_cmd);
frm.setCommandListener(this);
display.setCurrent(frm);
public void pauseApp() {
public void destroyApp(boolean unconditional) {
public void commandAction(Command c, Displayable d) {
if(c==Exit_cmd){
notifyDestroyed();
}

Answer 1

The cause is case mismatch.
     Your method signature : public int Add2Numbers(int x,int y) --- Upper Case
But the signature produced is
ouldn't find a matching Java operation for WSDD operation "add2Numbers" (2 args)
( from the error trace ) -- Lower case.
     Change the case of your method to add2number (lowercase ) as per conventions and you code will work.
Rgdz,
Saroj Kumar