[kempston]

Hi,

I compiled sources of helloworldplus demo application with javac 1.4.2_06. I can install it on Emulator but it is impossible to run it. No error is generated - after launch nothing happens.

The original jar of hello application can be loaded and run successfully. The only difference is that in my jar are classes compiled by me, JAD and manifest are the same except jar size parameter in jad.

Does anybody know how to fix it?
Where can I find any log?

I'm using Emulator from S60 3rd SDK for MIDP.

Regards,
kempston

[prakash.raman]

well its very difficut to say wat might be cause, so u try to put some system.out in the code and try if the app is starting or not, and in catch block print the excepcetion and see if any comming.

[kempston]

I put try-catch in startApp(), but nothing changed. Application is installable but I cannot run it. No error, no visible effects. In diagnostic tools I can't see HelloWorldPlus process. It seems that launching engine in emulator in some reason doesn't work with my application.

To be completely sure I produced following code and experienced the same:

package ex3;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class Class1 extends MIDlet {
public void startApp() {
try {
System.out.println("It's OK!");
} catch (Exception e) {
e.printStackTrace(System.out);
}
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
}

Is it possible to switch emulator to generate log with internal events?

[prakash.raman]

well buddy i did minor changes in your code and it working fine on wtk tool kit...

package ex3;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class Class1 extends MIDlet {
public void startApp() {
try {
System.out.println("It's OK!");
} catch (Exception e) {
System.out.println(e);
}
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
}

well wat emulator u using...depending on that u can generate internal logs.... wtk emulator u can enbale logs by setting preferences...

[kempston]

Yes, on WTK it can run.

I installed this application in FP1 emulator and then I've got the same error which was described by mnoromaa in http://discussion.forum.nokia.com/fo...d.php?t=107166

[prakash.raman]

Well buddy i tried that code on series 60 3rd edition emulator and it is not working but just try this one if its wokring on ur emulator or not..

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.*;

public class MIDlet00 extends MIDlet {

TestCanvas testCanvas;

public MIDlet00(){
super();
}
protected void startApp() throws MIDletStateChangeException {
testCanvas = new TestCanvas(this);
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
} // MIDlet

class TestCanvas extends Canvas {
private Display display;
private static int keyCode=0;
private MIDlet midlet;
private final String exitCommandString = "Exit";
public TestCanvas(MIDlet midlet){
this.midlet = midlet;
display = Display.getDisplay(this.midlet);
display.setCurrent(this);
}
public void paint(Graphics g){
g.setColor(0x000000);
g.fillRect(0,0,getWidth(),getHeight());
g.setColor(0xFFFFFF);
g.drawString(exitCommandString,getWidth()/2,getHeight(),Graphics.HCENTER|Graphics.BOTTOM);
g.drawString("KeyPressed Code: "+keyCode,5,10,Graphics.LEFT|Graphics.TOP);
g.drawString("Screen Size: "+getWidth()+"x"+getHeight(),5,50,Graphics.LEFT|Graphics.TOP);
}
protected void keyPressed(int key){
System.out.println("Key Pressed: "+key);
if(getGameAction(key)==FIRE)
midlet.notifyDestroyed();
keyCode = key;
repaint();
}
}

[kempston]

On S60 3rd MIDP - nothing
On S60 3rd MIDP FP1 - "unhandled exception. application close?"
On WTK it works partly - after launch pressing any key exits the emulator.

In WTK I saw interesting thing. There was an ALERT: java/lang/ClassFormatError:Bad version information

It seems that there is an java version incompatibility among my jar, standard libraries used during compilation, and JVM the emulator run under.
I'll try to make some tests on different versions.

[kempston]

Eureka!

According to http://developers.sun.com/mobility/m...ant/index.html
all class after compilation and before making jar MUST BE preverified.

Preverificator is in bin catalog WTK or Nokia SDK.

Thanks prakash.raman for your attention.

[prakash.raman]

Good man u got the solution..