Problemas ao Ler dados do Oracle

Olá Amigos, estou começando no mundo Java, e preciso de uma ajuda !!

Depois de fazer a conexão com o bando Oracle e criar a query,
a aplicação compila sem erros, porem ao fazer uma pesquisa na base, o compilador me apresenta o seguinte erro :

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

utilizo o JBuilder2006…

Se puderem me dar uma força ! Abraço

package teste_cadastro_paciente;

import java.awt.BorderLayout;

import javax.swing.<em>;

import java.awt.FlowLayout;

import java.awt.GridLayout;

import java.awt.GridBagLayout;

import java.awt.</em>;

import java.awt.Rectangle;

import com.borland.jbcl.layout.XYLayout;

import com.borland.jbcl.layout.<em>;

import javax.swing.JTextField;

import javax.swing.JLabel;

import com.borland.dx.sql.dataset.</em>;

import java.sql.<em>;

import java.util.</em>;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import com.borland.dx.dataset.NavigationEvent;

import com.borland.dx.dataset.NavigationListener;

/**

• <p>Title: </p>

• <p>Description: </p>

• <p>Copyright: Copyright © 2007</p>

• <p>Company: </p>

• @author not attributable

• @version 1.0
  
  */
  
  public class Consulta_Paciente extends JFrame {
  
  XYLayout xYLayout1 = new XYLayout();
  
  JButton btnPrimeiro = new JButton();
  
  JButton btnAnterior = new JButton();
  
  JButton btnProximo = new JButton();
  
  JButton btnUltimo = new JButton();
  
  JButton btnSalvar = new JButton();
  
  JButton btnDeletar = new JButton();
  
  JButton btnAlterar = new JButton();
  
  JTextField jTextField1 = new JTextField();
  
  JLabel jLabel1 = new JLabel();
  
  JTextField jTextField2 = new JTextField();
  
  JLabel jLabel2 = new JLabel();
  
  Database database1 = new Database();
  
  QueryDataSet qryPaciente = new QueryDataSet();
  
  JButton btnLimpa = new JButton();
  
  JButton btnPesquisa = new JButton();
  
  public Consulta_Paciente() {
  
  try {
  
  jbInit();
  
  } catch (Exception exception) {
  
  exception.printStackTrace();
  
  }
  
  }
  

  private void jbInit() throws Exception {
  
  getContentPane().setLayout(xYLayout1);
  
  btnPrimeiro.setText("<<");
  
  btnProximo.setText(">");
  
  btnUltimo.setText(">>");
  
  this.setTitle(“Consulta Paciente”);
  
  btnSalvar.setText(“Salvar”);
  
  btnDeletar.setText(“Excluir”);
  
  btnAlterar.setText(“Alterar”);
  
  jLabel1.setText(“Cod”);
  
  jLabel2.setText(“Nome”);
  
  database1.setConnection(new ConnectionDescriptor(
  
  “jdbc:oracle:thin:@198.17.76.3:1521:hscp”, “dbamv”, “2930down”, false,
  
  “oracle.jdbc.driver.OracleDriver”));
  
  btnLimpa.setText(“Limpa”);
  
  btnLimpa.addActionListener(new Consulta_Paciente_btnLimpa_actionAdapter(this));
  
  btnPesquisa.setText(“Pesquisa”);
  
  btnPesquisa.addActionListener(new
  
  Consulta_Paciente_btnPesquisa_actionAdapter(this));
  
  qryPaciente.addNavigationListener(new
  
  Consulta_Paciente_qryPaciente_navigationAdapter(this));
  
  this.getContentPane().add(btnPrimeiro, new XYConstraints(5, 4, -1, -1));
  
  this.getContentPane().add(btnAnterior, new XYConstraints(61, 4, -1, -1));
  
  this.getContentPane().add(btnProximo, new XYConstraints(109, 3, -1, -1));
  
  this.getContentPane().add(btnUltimo, new XYConstraints(156, 2, -1, -1));
  
  this.getContentPane().add(btnSalvar, new XYConstraints(212, 3, -1, -1));
  
  this.getContentPane().add(jTextField2,
  
  new XYConstraints(176, 115, 179, 24));
  
  this.getContentPane().add(jLabel2, new XYConstraints(117, 116, 56, 27));
  
  this.getContentPane().add(jLabel1, new XYConstraints(117, 59, 51, 24));
  
  this.getContentPane().add(jTextField1,
  
  new XYConstraints(176, 58, 179, 24));
  
  this.getContentPane().add(btnDeletar, new XYConstraints(281, 3, -1, -1));
  
  this.getContentPane().add(btnAlterar, new XYConstraints(351, 3, -1, -1));
  
  this.getContentPane().add(btnLimpa, new XYConstraints(5, 32, -1, -1));
  
  this.getContentPane().add(btnPesquisa, new XYConstraints(5, 61, -1, -1));
  
  btnAnterior.setText("<");
  
  }
  

  private void fazConsulta
  
  (String criterio)
  
  {
  
  String comando = "SELECT CD_ATI_MED,DS_ATI_MED FROM ATI_MED ";
  

  if (!(criterio == null||criterio.equals("")))
       comando += " WHERE CD_ATI_MED = " + criterio;
  
   qryPaciente.close();
   qryPaciente.setQuery(new QueryDescriptor (database1, comando));
   qryPaciente.open();
  
   if (qryPaciente.getRowCount() == 0)
       JOptionPane.showMessageDialog(null, "Registro não encontrado");
  
       else
           qryPaciente.first();
  

  }

  private void limpaCampos()
   {
           jTextField1.setText("");
           jTextField2.setText("");
   }
  
   private void moveCampos()
   {
       limpaCampos();
       jTextField1.setText(qryPaciente.getBigDecimal("CD_ATI_MED").toString());
       jTextField2.setText(qryPaciente.getString("DS_ATI_MED"));
  
   }
  

  public void btnLimpa_actionPerformed(ActionEvent actionEvent) {
  
  limpaCampos();
  
  }
  

  public void btnPesquisa_actionPerformed(ActionEvent actionEvent) {
  String valor = null;

  if (JOptionPane.showConfirmDialog (null, "Deseja consultar todos os registros?","Sistema",
      JOptionPane.YES_NO_OPTION) == JOptionPane.NO_OPTION)
  {
  
      valor = JOptionPane.showInputDialog("Digite o código do paciente");
  
      if (valor == null||valor.equals(0))
          return;
  }
  fazConsulta(valor);
  

  }

  public void qryPaciente_navigated(NavigationEvent navigationEvent) {

  moveCampos();
   btnPrimeiro.setEnabled(!qryPaciente.atFirst());
   btnAnterior.setEnabled(!qryPaciente.atLast());
   btnUltimo.setEnabled(!qryPaciente.atLast());
   btnProximo.setEnabled(!qryPaciente.atLast());
  

  }

  public void jButton1_actionPerformed(ActionEvent e) {
  
  String valor = null;
  
  fazConsulta(valor);
  
  }
  

}

class Consulta_Paciente_qryPaciente_navigationAdapter implements

NavigationListener {

private Consulta_Paciente adaptee;

Consulta_Paciente_qryPaciente_navigationAdapter(Consulta_Paciente adaptee) {

this.adaptee = adaptee;

}

public void navigated(NavigationEvent navigationEvent) {
    adaptee.qryPaciente_navigated(navigationEvent);
}

}

class Consulta_Paciente_btnPesquisa_actionAdapter implements ActionListener {

private Consulta_Paciente adaptee;

Consulta_Paciente_btnPesquisa_actionAdapter(Consulta_Paciente adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent actionEvent) {
    adaptee.btnPesquisa_actionPerformed(actionEvent);
}

}

class Consulta_Paciente_btnLimpa_actionAdapter implements ActionListener {

private Consulta_Paciente adaptee;

Consulta_Paciente_btnLimpa_actionAdapter(Consulta_Paciente adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent actionEvent) {
    adaptee.btnLimpa_actionPerformed(actionEvent);
}

}