Problema JTable

import java.awt.<em>;

import java.awt.event.ActionEvent;

import javax.swing.</em>;

import javax.swing.JTextField;

import javax.swing.border.<em>;

import java.util.</em>;

import java.sql.<em>;

import java.text.</em>;

import br.com.gerson.util.ConfiguracaoFirebird;

private JPanel jContentPane = null;
private JPanel jPanel = null;
    private JRadioButton radIndex1 = null;
    private JRadioButton radIndex2 = null;
    private JRadioButton radIndex3 = null;
    private JTextField campoPsq = null;
    private JButton btnPsq = null;
private JButton btnRecuperar = null;
private JButton btnSair = null;
private JTable tblRubrica = null;

private String DRV;
private String url;
private String userName;
private String password;
private Connection conn;
    private String query = "";
private String nuCodigo = "";

    
public Pesq1() {
	super();
	initialize();
}

private void initialize() {
	this.setSize(300,200);
	this.setContentPane(getJContentPane());
	this.setTitle("Pesquisar Rubricas");
            
	// Lê arquivo de configuração
	ConfiguracaoFirebird cf = new ConfiguracaoFirebird();
	DRV = cf.getDRV();
	url = cf.getUrl();
	userName = cf.getUserName();
	password = cf.getPassword();
            
	// Carrega o driver Firebird
	try {
		Class.forName(DRV);
		conn = DriverManager.getConnection(url, userName, password);
	}
	catch (ClassNotFoundException cnfex) {
		System.err.println("Não foi possível carregar o driver." );
		cnfex.printStackTrace();
		System.exit(1); // Encerra o programa
	}
	catch (SQLException sqlex) {
		System.err.println("Não foi possível estabelecer conexão." );
		sqlex.printStackTrace();
	}

	// Dimensiona a tela
	Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	setSize(new Dimension(760,360));
	setLocation((screenSize.width-760)/2, (screenSize.height-360)/2);
	setVisible(false);

            // Recupera dados da tabela
            query = " select * from BANCOS order by CODIGO ";
	pesquisaTabela();    

}

private JPanel getJContentPane() {
	if(jContentPane == null) {
		jContentPane = new JPanel();
                    jContentPane.removeAll();
		jContentPane.setLayout(new BorderLayout());
		jContentPane.setBackground(new Color(238,238,238));
		jContentPane.add(getTblRubrica(), BorderLayout.CENTER);
		jContentPane.add(getJPanel(), BorderLayout.SOUTH);
	}
	return jContentPane;
}

private JPanel getJPanel() {
	if (jPanel == null) {
		jPanel = new JPanel();
		jPanel.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.RAISED));
		jPanel.setBackground(java.awt.Color.orange);
                    jPanel.add(getRadIndex1(), null);
                    jPanel.add(getRadIndex2(), null);                        
                    jPanel.add(getRadIndex3(), null);   
                    jPanel.add(getCampoPsq(), null);
		jPanel.add(getBtnPsq(), null);
                    jPanel.add(getBtnRecuperar(), null);			
		jPanel.add(getBtnSair(), null);
                    //campoPsq.requestFocus();
	}
	return jPanel;
}
    
    private JRadioButton getRadIndex1() {
        if (radIndex1 == null){
            radIndex1 = new JRadioButton();
            radIndex1.setFont(new Font("Dialog", Font.BOLD, 10));
            radIndex1.setText("Código");
            radIndex1.setSelected(true);
            radIndex1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent e) {
                    if (radIndex1.isSelected()){
                        radIndex2.setSelected(false);
                        radIndex3.setSelected(false);
                        campoPsq.requestFocus();
                    }
                }
            });
        }
        return radIndex1;
    }

    private JRadioButton getRadIndex2() {
        if (radIndex2 == null){
            radIndex2 = new JRadioButton();
            radIndex2.setFont(new Font("Dialog", Font.BOLD, 10));
            radIndex2.setText("Banco");
            radIndex2.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent e) {
                    if (radIndex2.isSelected()){
                        radIndex1.setSelected(false);
                        radIndex3.setSelected(false);
                        campoPsq.requestFocus();                            
                    }
                }
            });
        }
        return radIndex2;
    }

    private JRadioButton getRadIndex3() {
        if (radIndex3 == null){
            radIndex3 = new JRadioButton();
            radIndex3.setFont(new Font("Dialog", Font.BOLD, 10));                
            radIndex3.setText("Agência");
            radIndex3.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent e) {
                    if (radIndex3.isSelected()){
                        radIndex1.setSelected(false);
                        radIndex2.setSelected(false);
                        campoPsq.requestFocus();                            
                    }
                }
            });
        }
        return radIndex3;
    }
            
    private JTextField getCampoPsq() {
        if (campoPsq == null) {
            campoPsq = new JTextField(10);
        }
        return campoPsq;
    }
        
    private JButton getBtnPsq() {
	if (btnPsq == null) {
		btnPsq = new JButton();
		btnPsq.setFont(new Font("Dialog", Font.BOLD, 11));
		btnPsq.setText("Psq");
		btnPsq.addActionListener(new java.awt.event.ActionListener() { 
			public void actionPerformed(java.awt.event.ActionEvent e) {
				nuCodigo = "";
                                    if (radIndex1.isSelected())
                                        query = " select * from BANCOS "
                                              + " where CODIGO = " + campoPsq.getText()
                                              + " order by CODIGO ";
                                    else if (radIndex2.isSelected())
                                        query = " select * from BANCOS "
                                              + " where BANCO = " + campoPsq.getText()
                                              + " order by CODIGO ";
                                    else if (radIndex3.isSelected())
                                        query = " select * from BANCOS "
                                              + " where AGENCIA = " + campoPsq.getText()
                                              + " order by CODIGO ";

                                    pesquisaTabela();
			}
		});
	}
	return btnPsq;
}
    

private JButton getBtnRecuperar() {
	if (btnRecuperar == null) {
		btnRecuperar = new JButton();
		btnRecuperar.setFont(new Font("Dialog", Font.BOLD, 11));
		btnRecuperar.setText("Recuperar");
		btnRecuperar.addActionListener(new java.awt.event.ActionListener() { 
			public void actionPerformed(java.awt.event.ActionEvent e) {    
				pegaValor();
                                    fechaConexao();
				setVisible(false);
				dispose();
			}
		});
	}
	return btnRecuperar;
}

private JButton getBtnSair() {
	if (btnSair == null) {
		btnSair = new JButton();
		btnSair.setFont(new Font("Dialog", Font.BOLD, 11));
		btnSair.setText("Sair");
		btnSair.addActionListener(new java.awt.event.ActionListener() { 
			public void actionPerformed(java.awt.event.ActionEvent e) {
				nuCodigo = "";
                                    fechaConexao();
				setVisible(false);
				dispose();
			}
		});
	}
	return btnSair;
}

private JTable getTblRubrica() {
	if (tblRubrica == null) {
		tblRubrica = new JTable();
		tblRubrica.setBorder(BorderFactory.createEmptyBorder(0,0,0,0));
		tblRubrica.setBackground(Color.white);
		tblRubrica.setForeground(new Color(51,51,51));
		tblRubrica.setGridColor(new Color(122,138,153));
	}
	return tblRubrica;
}

private void pesquisaTabela() {
	Statement comm;
	ResultSet resultSet;
            
	try {
		comm = conn.createStatement();
		resultSet = comm.executeQuery(query);
		exibeDados(resultSet);
		comm.close();
	}
	catch (SQLException sqlex) {
		sqlex.printStackTrace();
	}
}

private void exibeDados(ResultSet rs) throws SQLException	{
	// Posiciona para o primeiro registro
	boolean registros = rs.next();

	// Verifica se a tabela contém registros
	if (!registros) {
		JOptionPane.showMessageDialog(this, "Tabela vazia!" );
		setTitle("Sem registros para exibir" );
		return;
	}

	setTitle("Rubricas");
	Vector colunas = new Vector();
	Vector linhas = new Vector();

	try {
		// Monta cabeçalhos das colunas
		ResultSetMetaData rsmd = rs.getMetaData();

		for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
			colunas.addElement(trataNomeColuna(rsmd.getColumnName(i)));
		}

		do {
			linhas.addElement(recuperaDados(rs, rsmd));
		} while (rs.next());

		// Exibe os dados
		tblRubrica = new JTable(linhas, colunas);
		JScrollPane scroller = new JScrollPane(tblRubrica);
		getContentPane().add(scroller, BorderLayout.CENTER);
		validate();
	}
	catch (SQLException sqlex) {
		sqlex.printStackTrace();
	}
}

private Vector recuperaDados(ResultSet rs, ResultSetMetaData rsmd)
	throws SQLException	{
	Vector dadosTabela = new Vector();

	for (int i = 1; i <= rsmd.getColumnCount(); ++i) {
		dadosTabela.addElement(rs.getString(i));
	}	
	return dadosTabela;
}

private void fechaConexao() {
	try {
		conn.close();
    }
	catch (SQLException sqlex) {
		System.err.println( "Não foi possível encerrar a conexão." );
		sqlex.printStackTrace();
	}
}

public void pegaValor() {
	int row;
	int col = 0;
	try {
		row = tblRubrica.getSelectedRow();
		if (row >= 0) {
			Object data = tblRubrica.getValueAt(row, col);
			nuCodigo = data.toString();
		}    
	}
	catch(Exception e) {
		nuCodigo = "";
	}
}

private String trataNomeColuna(String str) {
	String result = "";

	String[] nomeColuna = new String[6];
	nomeColuna[0] = "CODIGO";
	nomeColuna[1] = "BANCO";
	nomeColuna[2] = "AGENCIA";
            nomeColuna[3] = "CONTA";
	nomeColuna[4] = "LIMITE";                
	nomeColuna[5] = "CHEQUE";
            
	String[] nomeTratado = new String[6];
	nomeTratado[0] = "Código";
	nomeTratado[1] = "Banco";
	nomeTratado[2] = "Agência";
	nomeTratado[3] = "Conta";
	nomeTratado[4] = "Limite";
	nomeTratado[5] = "Chq.Pré";                

	for (int i = 0; i < nomeColuna.length; ++i) {
		if (str.trim().equals(nomeColuna[i].trim())) {
			result = nomeTratado[i];
			break;
		}
	}
	
	return result;
}

public String getRubrica() {
	return nuCodigo;
}