import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.*;
import java.io.*;
public class Midlet extends MIDlet implements CommandListener,Runnable {
private Command exitMidlet;
private Command playAgain;
private Thread thread;

 public void startApp() {
exitMidlet = new Command("Exit", Command.EXIT, 1);
playAgain = new Command("Again", Command.SCREEN, 2);

Random r = new Random();
int a = r.nextInt(10);
Form form = new Form("");
form.addCommand(exitMidlet);
form.addCommand(playAgain);
form.setCommandListener(this);
form.append("Загаданное число - "+ a);
Display.getDisplay(this).setCurrent(form);
thread=new Thread(this); //создаем тред(паралл.метод)
thread.start(); //запускаем тред
 }

public void run(){
try{
thread.sleep(1000);
}catch(Exception e){}
}

 public void pauseApp() {
 }

 public void destroyApp(boolean unconditional) {
 }

public void commandAction(Command c, Displayable d)
{
if(c == exitMidlet)
{
destroyApp(false);
notifyDestroyed();
}
if(c == playAgain)
{
Random r = new Random();
int a = r.nextInt(10);
Form form = new Form("");
form.append("Загаданное число - "+ a);
Display.getDisplay(this).setCurrent(form);
} 
} }