Erro jTable ao manipular banco de dados usando Netbeans e JPA

Assuntos Gerais
#1

Pessoal,

Estou usando o Netbeans para criar um pequeno projeto Desktop, usando JPA para manipular o banco de dados. Eu adiciono os dados do banco em uma tabela e faço o vínculo dos jTextFields com estas informações (Isso usando o próprio Netbeans). O problema está na hora de inserir e deletar dados. Nos métodos que criei, após as alterações, ocorre o erro: java.lang.IndexOutOfBoundsException. É como se a jTable não reconhecesse as alterações efetuadas, como a inclusão de um novo registro. Essas alterações efetuadas na lista de dados que carregam a Jtable são monitoradas automaticamente ou eu tenho que informa-las sempre para a tabela?? Alguém sabe como posso solucionar o problema??

#2

Bom pessoal, vou postar o código para ver se alguém consegue ajudar…



package za;

import org.jdesktop.application.Action;

public class NewJFrame extends javax.swing.JFrame {

    /** Creates new form NewJFrame */
    public NewJFrame() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        bindingGroup = new org.jdesktop.beansbinding.BindingGroup();

        imPUEntityManager = java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory("imPU").createEntityManager();
        usuarioQuery = java.beans.Beans.isDesignTime() ? null : imPUEntityManager.createQuery("SELECT u FROM Usuario u");
        usuarioList = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : usuarioQuery.getResultList();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        org.jdesktop.swingbinding.JTableBinding jTableBinding = org.jdesktop.swingbinding.SwingBindings.createJTableBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, usuarioList, jTable1);
        org.jdesktop.swingbinding.JTableBinding.ColumnBinding columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${codigo}"));
        columnBinding.setColumnName("Codigo");
        columnBinding.setColumnClass(Integer.class);
        columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${nome}"));
        columnBinding.setColumnName("Nome");
        columnBinding.setColumnClass(String.class);
        columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${usuario}"));
        columnBinding.setColumnName("Usuario");
        columnBinding.setColumnClass(String.class);
        bindingGroup.addBinding(jTableBinding);
        jTableBinding.bind();
        jScrollPane1.setViewportView(jTable1);

        javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance().getContext().getActionMap(NewJFrame.class, this);
        jButton1.setAction(actionMap.get("NovoRegistro")); // NOI18N
        jButton1.setText("Novo");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(15, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, 375, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton1, javax.swing.GroupLayout.Alignment.TRAILING))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 170, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addContainerGap(78, Short.MAX_VALUE))
        );

        bindingGroup.bind();

        pack();
    }// </editor-fold>

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }

    @Action
    public void NovoRegistro() {

        za.Usuario l = new za.Usuario();
        imPUEntityManager.persist(l);
        usuarioList.add(l);
        int row = usuarioList.size()-1;
        jTable1.setRowSelectionInterval(row, row);
        jTable1.scrollRectToVisible(jTable1.getCellRect(row, 0, true));
     }



    // Variables declaration - do not modify
    private javax.persistence.EntityManager imPUEntityManager;
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private java.util.List<za.Usuario> usuarioList;
    private javax.persistence.Query usuarioQuery;
    private org.jdesktop.beansbinding.BindingGroup bindingGroup;
    // End of variables declaration

}

Ao executar o método NovoRegistro(), aparece o erro: java.lang.IndexOutOfBoundsException. Alguém sabe onde estou errando???

Abraços…

#3