"hello world" - my first MIDlet is not working .......

Question

Hi There,
I have downloaded J2ME toolkit recently and wrote a "hello world" MIDlet which is as follows
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HelloWorld extends MIDlet implements CommandListener
private Command cmd;
private Display display;
public HelloWorld()
display = Display.getDisplay( this );
cmd = new Command("Exit", Command.SCREEN, 1);
public void startApp()
TextBox t = new TextBox( "Hello ", "Ravi", 256, 0 );
t.addCommand( cmd );
t.setCommandListener( this );
display.setCurrent( t );
public void pauseApp()
public void destroyApp( boolean unconditional )
public void commandAction( Command c, Displayable s )
if( c == cmd )
destroyApp( false );
notifyDestroyed();
the code builds fine and when i run it it shows -
"Could not create icon com.sun.midp.midlet.Selector$MIDletInfo@8e597cUnable to create MIDlet ravi"
in my toolbar ................
can any tell me ..... how to set these icons........
thank you
ravi

Answer 1

Hi there,
I can successfully compiled these code and generated .JAD file. but when I try to convert inot PRC. It show me following error message:
File:E:\j2me_cldc\apps\HelloWorld\bin\HelloWorld.jad Result:Failed: The .JAR file corresponding to the .JAD file you want to convert is missing. Java Applications (MIDlets) are represented by both a .JAD and a .JAR file pair. Both the .JAD and .JAR must be present to convert the MIDlet to a .PRC file. Please make sure both the .JAD and the .JAR files are present.
How can I get aforementioned JAR file? Just pack the class file by myself or something else needed to be done additionally? Please give me a hand...
HeChangrun