[Resolvido] Listar dados de uma tabela MySql num Jcombobox

package br.com.rdi.bean;

public class RdiStatus {

    int cod;
    String Status;

    //Método para exibir tudo que tem na classe
    @Override
    public String toString() {
        return "RdiStatus{" + "cod=" + cod + ", Status=" + Status + '}';
    }

    //Construtor Vazio
    public RdiStatus() {
    }

    //Contrutor que recebe parametros
    public RdiStatus(int cod, String Status) {
        this.cod = cod;
        this.Status = Status;
    }

    //Get and Set
    public int getCod() {
        return cod;
    }

    public void setCod(int cod) {
        this.cod = cod;
    }

    public String getStatus() {
        return Status;
    }

    public void setStatus(String Status) {
        this.Status = Status;
    }
}

package br.com.rdi.dao;

import br.com.rdi.bean.RdiStatus;
import br.com.rdi.db.ConnectionMySQL;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JOptionPane;

public class RdiStatusDAO {

    //Método Inserir um registro na tabela RdiStatus(Insert - "C"RUD)
    public void inserir(RdiStatus rdi) throws SQLException {
        String sql = "INSERT INTO rdiStatus (Status) VALUES (?)";
        com.mysql.jdbc.Connection conn = ConnectionMySQL.getConnection();
        try {
            PreparedStatement pstm = conn.prepareStatement(sql);
            pstm.setString(1, rdi.getStatus());
            pstm.execute();
            pstm.close();
            JOptionPane.showMessageDialog(null, "Critério cadastrado!");
        } catch (SQLException ex) {
            JOptionPane.showMessageDialog(null, ex);
        }
    }

    //Metodo para Alterar dados de um registro da tabela RdiStatus (Update - CR"U"D)
    public void alterar(RdiStatus rdi) throws SQLException {
        String sql = "UPDATE rdiStatus SET Status=? WHERE cod=?";
        com.mysql.jdbc.Connection conn = ConnectionMySQL.getConnection();
        try {
            PreparedStatement pstm = conn.prepareStatement(sql);
            pstm.setString(1, rdi.getStatus());
            pstm.setInt(2, rdi.getCod());
            pstm.executeUpdate();
            pstm.close();
            JOptionPane.showMessageDialog(null, "Critério alterada com sucesso!");
        } catch (SQLException ex) {
            JOptionPane.showMessageDialog(null, ex);
        }
    }

    //Metodo para retornar todas os registros da tabela RdiStatus (Read - C"R"UD)
    public List<RdiStatus> obterTabela() {
        List<RdiStatus> listaRdiStatus = new ArrayList<>();
        Connection conn = ConnectionMySQL.getConnection();
        Statement stmt = null;
        ResultSet rs = null;
        String sql = "SELECT * FROM rdiStatus";
        try {
            stmt = conn.createStatement();
            rs = stmt.executeQuery(sql);
            while (rs.next()) {
                RdiStatus rdi = new RdiStatus();
                rdi.setCod(rs.getInt("cod"));
                rdi.setStatus(rs.getString("Status"));
                listaRdiStatus.add(rdi);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            ConnectionMySQL.close((com.mysql.jdbc.Connection) conn, stmt, rs);
        }
        return listaRdiStatus;
    }

    //Metodo para retornar apenas um registro da tabela RdiStatus (Read - C"R"UD)
    @SuppressWarnings("CallToThreadDumpStack")
    public RdiStatus obterRdi(int id) {
        RdiStatus rdi = new RdiStatus();
        Connection conn = ConnectionMySQL.getConnection();
        Statement stmt = null;
        ResultSet rs = null;
        String sql = "SELECT * FROM rdiStatus WHERE cod = " + id;
        try {
            stmt = conn.createStatement();
            rs = stmt.executeQuery(sql);
            if (rs.next()) {
                rdi.setCod(rs.getInt("cod"));
                rdi.setStatus(rs.getString("Status"));
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            ConnectionMySQL.close((com.mysql.jdbc.Connection) conn, stmt, rs);
        }
        return rdi;
    }

    //Metodo para Deletar um registro da tabela RdiStatus (Delete - CRU"D")
    public boolean deletar(int id) {
        boolean ret = false;
        RdiStatus rdi = obterRdi(id);
        if (rdi.getCod() > 0) {
            Connection conn = ConnectionMySQL.getConnection();
            Statement stmt = null;
            String sql = "DELETE FROM rdiStatus WHERE cod = " + id;
            try {
                stmt = conn.createStatement();
                stmt.executeUpdate(sql);
                ret = true;
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                ConnectionMySQL.close((com.mysql.jdbc.Connection) conn, stmt);
            }
        }
        return ret;
    }
}