j2me + rms

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.util.Vector;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.*;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;

/**
 * @author lorenzi
 */
public class firstRMS extends MIDlet implements CommandListener {

    private Display disp;
    private Form    frm;
    private int     number;
    private TextBox tbNumber;
    private Command cmSair;
    private Command cmIncluir;
    private Command cmVoltaForm;
    private RecordStore rsNumber;
    private RecordEnumeration reNumber;
    private Vector veNumber = new Vector();
    private String msg;


    public void startApp() {
        disp = Display.getDisplay(this);
        frm = new Form("Bem vindo ao RMS");
        cmSair = new  Command("Sair", Command.EXIT, 1);
        cmIncluir = new Command("Adicionar", Command.ITEM, 2);
        cmVoltaForm = new Command("Voltar", Command.BACK, 1);
        frm.addCommand(cmSair);
        frm.addCommand(cmIncluir);
        frm.setCommandListener(this);
        tbNumber = new TextBox("Lista de Cadastro", null,600,TextField.ANY);
        tbNumber.addCommand(cmVoltaForm);
        tbNumber.setCommandListener(this);

        disp.setCurrent(tbNumber);
        setRms();
        mostraDados();
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void setRms(){
        try
        {
           rsNumber = RecordStore.openRecordStore("dbNumber", true);
           System.out.println("Banco criado");
           System.out.println("Banco: "+rsNumber.getName());   //nome do banco
           System.out.println("Registros: " + rsNumber.getNumRecords());   

        }
        catch(Exception erro)
        {
           System.out.println("Erro no banco de dados");
        }
    }
    public void insere(){
        try{
           //responsavel pela manipulacao byte a byte
            //conjunto de dados e manipulo em bytes
           ByteArrayOutputStream bStream = new ByteArrayOutputStream();
           //fluxo de saida de dados, possibilita escrever em bites a bites
           DataOutputStream      dStream = new DataOutputStream(bStream);
           dStream.writeUTF("Numero: ");
           dStream.writeInt(number);
           //fluxo de saida de dados força para saida de memoria
           dStream.flush();
           //vetor para manipular byte a byte
           byte [] numeros = bStream.toByteArray();
           //adiciona no RMS
           rsNumber.addRecord(numeros,0,numeros.length);
           bStream.close();
           dStream.close();
        }
        catch(Exception e)
        {
            System.out.println("Errroooo de inserir");
        }
    }
    public void mostraDados(){
        try{
            ByteArrayInputStream inputStream = null;
            DataInputStream      dataStream  = null;
            //respositorio de dados = resultSet
            //primeiro filtro recordFilter
            //segundo ordenar lista
            //terceiro dados atualizados qdo deletar se for false porde mostrar
            reNumber  = rsNumber.enumerateRecords(null, null, false);
            int id = 0;
            byte[] dados = null;
            veNumber.removeAllElements();
            //repeticao
            msg = "";
            while (reNumber.hasNextElement())
            {
               id = reNumber.nextRecordId();
               veNumber.addElement(""+id);
               dados = rsNumber.getRecord(id);
               //inicializa com o valor de dados byte a byte
               inputStream = new ByteArrayInputStream(dados);
               //iniciliaza os caracteres com o retorno do inputStream
               dataStream  = new DataInputStream(inputStream);

               msg =  msg + dataStream.readUTF()+ " - " + dataStream.readInt() + "\n";
            }
            if (msg == ""){
                msg = "Nenhum dado encontrado!";
            }
            tbNumber.setString(msg);
            inputStream.close();
            dataStream.close();

        }
        catch(Exception e)
        {
          System.out.println("Erro ao acessar dados!");
        }
    }
    public void commandAction(Command c, Displayable d) {
        if (c == cmSair){
            destroyApp(true);
            notifyDestroyed();
        }else
        if (c == cmIncluir){
           for (int i = 0;i < 10; i++){
               number = i;
               insere();
           }
           mostraDados();
           disp.setCurrent(tbNumber);
        }else
        if (c == cmVoltaForm){
           disp.setCurrent(frm);
        }

    }
}