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

public class HelloClass extends MIDlet implements CommandListener {
Display d=Display.getDisplay(this);
 private Command exit=new Command("exit",Command.EXIT,0);
 public void startApp() {
HelloCanvas Canv=new HelloCanvas();
Canv.addCommand(exit);
Canv.setCommandListener(this);
d.setCurrent(Canv);
}

public void pauseApp() {
 }

 public void destroyApp(boolean unconditional) {
 notifyDestroyed();}

public void commandAction(Command command, Displayable displayable){
if (command==exit)destroyApp(false);
}
}