Netbeans - AYUDA CON CODIGO EN NETBEANS

package Formularios;

import Datos.DAlmacen;

import Datos.DDetalleFacturas;

import Datos.DFactura;

import Logica.LAlmacen;

import Logica.LDetalleFacturas;

import Logica.LFactura;

import java.awt.event.KeyEvent;

import java.sql.Date;

import java.text.DecimalFormat;

import java.util.Calendar;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

import javax.swing.table.DefaultTableModel;

/**

 *

 */

public final class FrmFacturas extends javax.swing.JInternalFrame {

    DefaultTableModel miModelo;

    static int idlineas = 0;

    public static void setProveedores(String id, String proveedor) {

        txtIdProveedores.setText(id);

        txtProveedor.setText(proveedor);

    }

    public static void setLinea(String id, String linea) {

        idlineas = Integer.parseInt(id);

        txtIdLineas.setText(id);

        txtLinea.setText(linea);

    }

    /**

     * Creates new form FrmFacturas

     */

    public FrmFacturas() {

        initComponents();

        habilitar(true);

        jLabel1.setVisible(false);

        txtIdFacturas.setVisible(false);

        txtIdLineas.setVisible(false);

        txtIdProveedores.setVisible(false);

        txtTotal.setEditable(false);

        miModelo = (DefaultTableModel) tblFacturas.getModel();

        tblFacturas.getColumn("CODIGO").setWidth(15);

        tblFacturas.getColumn("CODIGO").setPreferredWidth(15);

        tblFacturas.getColumn("DESCRIPCION").setWidth(220);

        tblFacturas.getColumn("DESCRIPCION").setPreferredWidth(220);

        tblFacturas.getColumn("CANTIDAD").setWidth(20);

        tblFacturas.getColumn("CANTIDAD").setPreferredWidth(20);

        tblFacturas.getColumn("U/MEDIDA").setWidth(20);

        tblFacturas.getColumn("U/MEDIDA").setPreferredWidth(20);

        tblFacturas.getColumn("P/UNITARIO").setWidth(20);

        tblFacturas.getColumn("P/UNITARIO").setPreferredWidth(20);

        tblFacturas.getColumn("TOTAL").setWidth(20);

        tblFacturas.getColumn("TOTAL").setPreferredWidth(20);

        txtIdLineas.setEnabled(false);

        txtIdProveedores.setEnabled(false);

    }

    public void habilitar(boolean b) {

        txtEnter.setEnabled(!b);

        txtFecha.setEnabled(!b);

        txtLinea.setEnabled(!b);

        txtProveedor.setEnabled(!b);

        btnCancelar.setEnabled(!b);

        btnGuardar.setEnabled(!b);

        btnBuscarLinea.setEnabled(!b);

        btnBuscarProveedor.setEnabled(!b);

        btnNuevo.setEnabled(b);

    }

    /**

     * 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() {

        jPanel1 = new javax.swing.JPanel();

        jLabel1 = new javax.swing.JLabel();

        jLabel2 = new javax.swing.JLabel();

        jLabel3 = new javax.swing.JLabel();

        jLabel4 = new javax.swing.JLabel();

        txtIdFacturas = new javax.swing.JTextField();

        txtLinea = new javax.swing.JTextField();

        txtProveedor = new javax.swing.JTextField();

        btnBuscarLinea = new javax.swing.JButton();

        btnBuscarProveedor = new javax.swing.JButton();

        jScrollPane1 = new javax.swing.JScrollPane();

        tblFacturas = new javax.swing.JTable();

        btnNuevo = new javax.swing.JButton();

        btnGuardar = new javax.swing.JButton();

        btnCancelar = new javax.swing.JButton();

        txtIdLineas = new javax.swing.JTextField();

        txtIdProveedores = new javax.swing.JTextField();

        txtFecha = new com.toedter.calendar.JDateChooser();

        txtEnter = new javax.swing.JTextField();

        txtTotal = new javax.swing.JTextField();

        jLabel5 = new javax.swing.JLabel();

        setClosable(true);

        setIconifiable(true);

        setMaximizable(true);

        setPreferredSize(new java.awt.Dimension(750, 530));

        jPanel1.setBackground(new java.awt.Color(153, 153, 255));

        jLabel1.setText("ID:");

        jLabel2.setText("LINEA:");

        jLabel3.setText("PROVEEDOR:");

        jLabel4.setText("FECHA:");

        btnBuscarLinea.setText("...");

        btnBuscarLinea.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                btnBuscarLineaActionPerformed(evt);

            }

        });

        btnBuscarProveedor.setText("...");

        btnBuscarProveedor.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                btnBuscarProveedorActionPerformed(evt);

            }

        });

        tblFacturas.setModel(new javax.swing.table.DefaultTableModel(

            new Object [][] {

            },

            new String [] {

                "CODIGO", "DESCRIPCION", "CANTIDAD", "U/MEDIDA", "P/UNITARIO", "TOTAL"

            }

        ));

        tblFacturas.addKeyListener(new java.awt.event.KeyAdapter() {

            public void keyPressed(java.awt.event.KeyEvent evt) {

                tblFacturasKeyPressed(evt);

            }

        });

        jScrollPane1.setViewportView(tblFacturas);

        btnNuevo.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Imagenes/Nuevo.png"))); // NOI18N

        btnNuevo.setText("Nuevo");

        btnNuevo.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                btnNuevoActionPerformed(evt);

            }

        });

        btnGuardar.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Imagenes/Guardar.jpg"))); // NOI18N

        btnGuardar.setText("Guardar");

        btnGuardar.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                btnGuardarActionPerformed(evt);

            }

        });

        btnCancelar.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Imagenes/cancelar.png"))); // NOI18N

        btnCancelar.setText("Cancelar");

        btnCancelar.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                btnCancelarActionPerformed(evt);

            }

        });

        txtEnter.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N

        txtEnter.addKeyListener(new java.awt.event.KeyAdapter() {

            public void keyPressed(java.awt.event.KeyEvent evt) {

                txtEnterKeyPressed(evt);

            }

        });

        txtTotal.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N

        txtTotal.setHorizontalAlignment(javax.swing.JTextField.RIGHT);

        txtTotal.addActionListener(new java.awt.event.ActionListener() {

            public void actionPerformed(java.awt.event.ActionEvent evt) {

                txtTotalActionPerformed(evt);

            }

        });

        jLabel5.setText("TOTAL:");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);

        jPanel1.setLayout(jPanel1Layout);

        jPanel1Layout.setHorizontalGroup(

            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(jPanel1Layout.createSequentialGroup()

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

                    .addGroup(jPanel1Layout.createSequentialGroup()

                        .addGap(55, 55, 55)

                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

                            .addComponent(jLabel4)

                            .addComponent(jLabel3)

                            .addComponent(jLabel2)

                            .addComponent(jLabel1))

                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)

                            .addComponent(txtProveedor, javax.swing.GroupLayout.Alignment.LEADING)

                            .addComponent(txtIdFacturas, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)

                            .addComponent(txtLinea, javax.swing.GroupLayout.Alignment.LEADING)

                            .addComponent(txtFecha, javax.swing.GroupLayout.DEFAULT_SIZE, 152, Short.MAX_VALUE))

                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

                            .addComponent(btnBuscarLinea, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)

                            .addComponent(btnBuscarProveedor, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))

                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)

                            .addComponent(txtIdLineas)

                            .addComponent(txtIdProveedores, javax.swing.GroupLayout.PREFERRED_SIZE, 27, javax.swing.GroupLayout.PREFERRED_SIZE)))

                    .addGroup(jPanel1Layout.createSequentialGroup()

                        .addContainerGap()

                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 717, javax.swing.GroupLayout.PREFERRED_SIZE))

                    .addGroup(jPanel1Layout.createSequentialGroup()

                        .addContainerGap()

                        .addComponent(txtEnter, javax.swing.GroupLayout.PREFERRED_SIZE, 156, javax.swing.GroupLayout.PREFERRED_SIZE)))

                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

            .addGroup(jPanel1Layout.createSequentialGroup()

                .addContainerGap()

                .addComponent(btnNuevo, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addGap(36, 36, 36)

                .addComponent(btnGuardar, javax.swing.GroupLayout.PREFERRED_SIZE, 112, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addGap(27, 27, 27)

                .addComponent(btnCancelar, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

                .addComponent(jLabel5)

                .addGap(18, 18, 18)

                .addComponent(txtTotal, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addGap(19, 19, 19))

        );

        jPanel1Layout.setVerticalGroup(

            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(jPanel1Layout.createSequentialGroup()

                .addGap(44, 44, 44)

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)

                    .addComponent(jLabel1)

                    .addComponent(txtIdFacturas, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

                .addGap(18, 18, 18)

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)

                    .addComponent(jLabel2)

                    .addComponent(txtLinea, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(btnBuscarLinea)

                    .addComponent(txtIdLineas, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

                .addGap(18, 18, 18)

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)

                    .addComponent(jLabel3)

                    .addComponent(txtProveedor, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(btnBuscarProveedor)

                    .addComponent(txtIdProveedores, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))

                .addGap(18, 18, 18)

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)

                    .addComponent(txtFecha, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(jLabel4))

                .addGap(32, 32, 32)

                .addComponent(txtEnter, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)

                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 177, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addGap(18, 18, 18)

                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

                    .addComponent(btnNuevo, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(btnGuardar, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(btnCancelar, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(txtTotal, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(jLabel5))

                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

        getContentPane().setLayout(layout);

        layout.setHorizontalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()

                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)

                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addContainerGap())

        );

        layout.setVerticalGroup(

            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(layout.createSequentialGroup()

                .addContainerGap()

                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))

        );

        pack();

    }// </editor-fold>

    private void btnBuscarLineaActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        FrmBuscarLineas mi = new FrmBuscarLineas(new JFrame(), true);

        mi.setLocationRelativeTo(null);

        mi.setVisible(true);

    }

    private void btnBuscarProveedorActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        FrmBuscarProveedores mi = new FrmBuscarProveedores(new JFrame(), true);

        mi.setLocationRelativeTo(null);

        mi.setVisible(true);

    }

    private void btnNuevoActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        habilitar(false);

    }

    private void btnGuardarActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        String msg = "", msgfinal = "";

        if (txtLinea.getText().equals("")) {

            JOptionPane.showMessageDialog(rootPane, "Campo linea obligatorio", "Validación", JOptionPane.WARNING_MESSAGE);

            txtLinea.requestFocusInWindow();

            return;

        }

        if (txtProveedor.getText().equals("")) {

            JOptionPane.showMessageDialog(rootPane, "Campo proveedor obligatorio", "Validación", JOptionPane.WARNING_MESSAGE);

            txtProveedor.requestFocusInWindow();

            return;

        }

        if (txtFecha.getDate() == null) {

            JOptionPane.showMessageDialog(rootPane, "Campo fecha obligatorio", "Validación", JOptionPane.WARNING_MESSAGE);

            txtFecha.requestFocusInWindow();

            return;

        }

        LFactura fn = new LFactura();

        DFactura dts = new DFactura();

        dts.setLineasId(Integer.parseInt(txtIdLineas.getText()));

        dts.setProveedoresId(Integer.parseInt(txtIdProveedores.getText()));

        Calendar cal;

        cal = txtFecha.getCalendar();

        int aa, mm, dd;

        aa = cal.get(Calendar.YEAR) - 1900;

        mm = cal.get(Calendar.MONTH);

        dd = cal.get(Calendar.DAY_OF_MONTH);

        dts.setFechaEntrada(new Date(aa, mm, dd));

        txtProveedor.setText("");

        txtLinea.setText("");

        txtLinea.setEnabled(false);

        txtProveedor.setEnabled(false);

        int idfact = fn.insertarFacturas(dts);

        if (idfact > 0) {

            int filas = tblFacturas.getRowCount();

            for (int i = 0; i < filas; i++) {

                String idprod = tblFacturas.getValueAt(i, 0).toString();

                String descrip = tblFacturas.getValueAt(i, 1).toString();

                int cantidad = Integer.parseInt(tblFacturas.getValueAt(i, 2).toString());

                String umedida = tblFacturas.getValueAt(i, 3).toString();

                double punitario = Double.parseDouble(tblFacturas.getValueAt(i, 4).toString());

                double total = Double.parseDouble(tblFacturas.getValueAt(i, 5).toString());

                LDetalleFacturas fundf = new LDetalleFacturas();

                DDetalleFacturas dtsf = new DDetalleFacturas();

                dtsf.setFacturasId(idfact);

                dtsf.setProductosId(idprod);

                dtsf.setCantidad(cantidad);

                dtsf.setTotal(total);

                String mensaje = fundf.registrarDetalleFactura(dtsf);

                if (mensaje.equals("si")) {

                    LAlmacen funAl = new LAlmacen();

                    DAlmacen dtsp = new DAlmacen();

                    dtsp.setIdAlmacen(idprod);

                    dtsp.setDescripcion(descrip);

                    dtsp.setStock(cantidad);

                    dtsp.setUMedida(umedida);

                    dtsp.setPUnitario(punitario);

                    dtsp.setLineasId(idlineas);

                    msgfinal = funAl.insertarProductos(dtsp);

                }

            }

            JOptionPane.showMessageDialog(rootPane, msgfinal, "Información", JOptionPane.INFORMATION_MESSAGE);

        } else {

            JOptionPane.showMessageDialog(rootPane, "Ocurio un problema al insertar", "Información", JOptionPane.ERROR_MESSAGE);

        }

        limpiar();

        habilitar(true);

    }

    public void limpiar() {

        txtLinea.setText("m");

        txtEnter.setText("");

        txtFecha.setDate(null);

        txtProveedor.setText("m");

        txtIdFacturas.setText("");

        txtIdLineas.setText("");

        txtIdProveedores.setText("");

        txtTotal.setText("");

        try {

            DefaultTableModel modelo = (DefaultTableModel) tblFacturas.getModel();

            int filas = tblFacturas.getRowCount();

            for (int i = 0; filas > i; i++) {

                modelo.removeRow(0);

            }

        } catch (Exception e) {

            JOptionPane.showMessageDialog(null, "Error al limpiar la tabla.");

        }

    }

    private void btnCancelarActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

        habilitar(true);

    }

    public boolean estaenTabla(String texto) {

        boolean res = false;

        DecimalFormat ft = new DecimalFormat("####.00");

        for (int i = 0; i < tblFacturas.getRowCount(); i++) {

            String codigo = tblFacturas.getValueAt(i, 0).toString();

            if (codigo.equals(texto)) {

                int cantidad = Integer.parseInt(tblFacturas.getValueAt(i, 2).toString());

                double preciounitario = Double.parseDouble(tblFacturas.getValueAt(i, 4).toString());

                int totalcantidad = cantidad + 1;

                tblFacturas.setValueAt(totalcantidad, i, 2);

                double totalparcial = totalcantidad * preciounitario;

                tblFacturas.setValueAt(ft.format(totalparcial), i, 5);

                res = true;

            }

        }

        sumarTotal();

        return res;

    }

    public void sumarTotal() {

        DecimalFormat ft = new DecimalFormat("####.00");

        double totalparcial = 0, totalfinal = 0;

        for (int i = 0; i < tblFacturas.getRowCount(); i++) {

            totalparcial = Double.parseDouble(tblFacturas.getValueAt(i, 5).toString());

            totalfinal += totalparcial;

            txtTotal.setText(ft.format(totalfinal));

        }

    }

    private void txtEnterKeyPressed(java.awt.event.KeyEvent evt) {

        // TODO add your handling code here:

        if (evt.getKeyCode() == KeyEvent.VK_ENTER) {

            boolean b = estaenTabla(txtEnter.getText());

            if (b == false) {

                mostrarProductos(txtEnter.getText());

            }

            sumarTotal();

            txtEnter.setText("");

        }

    }

    private void tblFacturasKeyPressed(java.awt.event.KeyEvent evt) {

        // TODO add your handling code here:

        DecimalFormat ft = new DecimalFormat("####.00");

        if (evt.getKeyCode() == KeyEvent.VK_ENTER) {

            for (int i = 0; i < tblFacturas.getRowCount(); i++) {

                int cantidad = Integer.parseInt(tblFacturas.getValueAt(i, 2).toString());

                double preciounitario = Double.parseDouble(tblFacturas.getValueAt(i, 4).toString());

                double totalparcial = cantidad * preciounitario;

                tblFacturas.setValueAt(ft.format(totalparcial), i, 5);

            }

            sumarTotal();

        }

    }

    private void txtTotalActionPerformed(java.awt.event.ActionEvent evt) {

        // TODO add your handling code here:

    }

    public void mostrarProductos(String producto) {

        LAlmacen fn = new LAlmacen();

        DAlmacen dts = new DAlmacen();

        DefaultTableModel tblDatos = (DefaultTableModel) tblFacturas.getModel();

        dts.setIdAlmacen(producto);

        String registros[] = fn.mostrarbuscarProductos(dts);

        if (registros[0] != null) {

            tblDatos.insertRow(0, registros);

            tblFacturas.setModel(tblDatos);

        } else {

            registros[0] = txtEnter.getText();

            registros[1] = "";

            registros[2] = "1";

            registros[3] = "";

            registros[4] = "0.00";

            registros[5] = "0.00";

            tblDatos.insertRow(0, registros);

            tblFacturas.setModel(tblDatos);

        }

    }

    // Variables declaration - do not modify

    private javax.swing.JButton btnBuscarLinea;

    private javax.swing.JButton btnBuscarProveedor;

    private javax.swing.JButton btnCancelar;

    private javax.swing.JButton btnGuardar;

    private javax.swing.JButton btnNuevo;

    private javax.swing.JLabel jLabel1;

    private javax.swing.JLabel jLabel2;

    private javax.swing.JLabel jLabel3;

    private javax.swing.JLabel jLabel4;

    private javax.swing.JLabel jLabel5;

    private javax.swing.JPanel jPanel1;

    private javax.swing.JScrollPane jScrollPane1;

    private javax.swing.JTable tblFacturas;

    private javax.swing.JTextField txtEnter;

    private com.toedter.calendar.JDateChooser txtFecha;

    private javax.swing.JTextField txtIdFacturas;

    public static javax.swing.JTextField txtIdLineas;

    public static javax.swing.JTextField txtIdProveedores;

    public static javax.swing.JTextField txtLinea;

    public static javax.swing.JTextField txtProveedor;

    private javax.swing.JTextField txtTotal;

    // End of variables declaration

}

public void sumarTotal() {

    DecimalFormat ft = new DecimalFormat("####.00");

    double totalparcial = 0, totalfinal = 0;

    for (int i = 0; i < tblFacturas.getRowCount(); i++) {

        totalparcial = Double.parseDouble(tblFacturas.getValueAt(i, 5).toString());

        totalfinal += totalparcial;

        txtTotal.setText(ft.format(totalfinal));

    }

"50,00"

"50.00"

public void sumarTotal() {

    DecimalFormat ft = new DecimalFormat("####.00");

    double totalparcial = 0, totalfinal = 0;

    for (int i = 0; i < tblFacturas.getRowCount(); i++) {

        String valor = tblFacturas.getValueAt(i, 5).toString(); //Recuperamos valor

        valor = valor.replace("," , "."); //Sustituimos coma por punto

        totalparcial = Double.parseDouble(valor); //Parseamos

        totalfinal += totalparcial;

        txtTotal.setText(ft.format(totalfinal));

    }