MIDlet

import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.*;
 
public class CalendarControl extends MIDlet implements CommandListener {
   private Display display;
   private Display display2;
   private TextField userName;
   private TextField password;
   private Form form;
   private Form form2;
   private Command cancel;
   private Command login;
   private Command next;
   private ChoiceGroup technology;
 
 
   public CalendarControl() {
      userName = new TextField("LoginID:", "", 10, TextField.ANY);
      password = new TextField("Password:", "", 10, TextField.PASSWORD);
      form = new Form("Sign in");
      form2 = new Form("App Form");
      cancel = new Command("Cancel", Command.CANCEL, 2);
      login = new Command("Login", Command.OK, 2);
      next =new Command("Next", Command.OK,2);
      technology = new ChoiceGroup("Select Technology Which You Know", Choice.MULTIPLE);
   }
 
   public void startApp() {
      display = Display.getDisplay(this);
      form.append(userName);
      form.append(password);
      form.addCommand(cancel);
      form.addCommand(login);
      form.setCommandListener(this);
      display.setCurrent(form);
   }
 
   public void pauseApp() {
   }
 
   public void destroyApp(boolean unconditional) {
      notifyDestroyed();
   }
 
   public void validateUser(String name, String password) {
     if (name.equals("qm") && password.equals("j2")) {
       menu();
     } else {
       tryAgain();
     }
   }
 
   public void menu() {
    display = Display.getDisplay(this);
    technology.append("JAVA", null);
    technology.append("J2ME", null);
    technology.append("J2EE", null);
    technology.append("JSF", null);
    form2.addCommand(next);
    form2.append(technology);
    display.setCurrent(form2);
   }
 
   public void showMenu(){
 
   }
 
   public void tryAgain() {
     Alert error = new Alert("Login Incorrect", "Please try again", null, AlertType.ERROR);
     error.setTimeout(Alert.FOREVER);
     userName.setString("");
     password.setString("");
     display.setCurrent(error, form);
   }
 
   public void commandAction(Command c, Displayable d) {
      String label = c.getLabel();
      if(label.equals("Cancel")) {
        destroyApp(true);
      } else if(label.equals("Login")) {
         validateUser(userName.getString(), password.getString());
      } 
 
   }
}