Oroscopo en java microedition

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

public class lab02 extends MIDlet implements CommandListener {
private Form form,formularioinformacion,formchoicegrup,formaries,formtauro,formgeminis,formcancer;
//las siguientes son ejemplos de declaracion de variables
Alert alerta;
TextBox caja;
Command continuar;
String Text;
String inbox,xx;
private Graficospantalla_graficos;
Display pantalla_principal;
private Command salir, entrar,irachoice,selects1;
private StringItem info,REX;
private StringItem TT,TTT;
private ChoiceGroup calc,calc1;
private int masc,fem;
intx;
TextField textfield,textfield2;
String[] signos = {"Aries","Tauro","Géminis","Cáncer","Leo","Virgo","Libra","Escorpio","Sagitario","Capricornio","Acuario","Piscis"};
String[] sexo ={"Masculino","Femenino"};
public lab02() {

pantalla_principal = Display.getDisplay(this);
//..............

//...............
pantalla_graficos = new Graficos();
entrar = new Command("Entrar", Command.OK, 1);pantalla_graficos.addCommand(entrar);
pantalla_graficos.setCommandListener(this);

//.............................................
formularioinformacion = new Form(" ¡Informacion!");
info=new StringItem ("Seleccione la opción: ' Ir A..' ","\nY precione entrar para saber su temperamento.\n \n\n ");
formularioinformacion.append(info);
irachoice = new Command("Ir A...", Command.OK,1);
formularioinformacion.addCommand(irachoice );
formularioinformacion.setCommandListener(this);

//..................................
formchoicegrup= new Form(" Seleccione una opción");
calc1= new ChoiceGroup(" Selecciona tu SEXO.",List.EXCLUSIVE, sexo, null);
formchoicegrup.append(calc1);

calc = new ChoiceGroup( " Selecciona tu SIGNO.",List.EXCLUSIVE, signos,null);// o ,images en vez de null
formchoicegrup.append(calc);

textfield = new TextField(" Respuesta:", "", 300, TextField.ANY);
formchoicegrup.append(textfield);

textfield2 = new...