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Thread: Refreshing JTable!!

  1. #1
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    Default Refreshing JTable!!

    Hi, I hope you are fine, I got a doubt.......it's just that I have a defaulttablemodel and jtable where I get information from my DB, the problem is that I got another windows to add the information, it's a windows with a JTextField and JLabel and button...well my problem is that when I add information to the DB my "QUERY" runs without any problem, but I don't know how to do for refreshing my JTable because if I have my JTable opened, it doesn't refresh, and when I close it and I open it again, I get all the new informations

    I've been trying with a lots of methods like:
    fireTableDataChanged();
    .fireTableStructureChanged();
    .updateUI();
    .revalidate();

    But nothing, it seems to work, I don't know why :S
    this is my code, if anybody has a suggetion, pls let me know and I will really thank you:

    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.util.ArrayList;
    import java.util.List;
    import javax.swing.JFrame;
    import javax.swing.JMenuBar;
    import javax.swing.JMenu;
    import javax.swing.JMenuItem;
    import javax.swing.JOptionPane;
    import javax.swing.JTable;
    import javax.swing.JScrollPane;
    import javax.swing.table.DefaultTableModel;
    import javax.swing.event.TableModelEvent;
    import javax.swing.event.TableModelListener;
     
    public class teoriasDatos extends JFrame implements ActionListener, TableModelListener{
     
        private final String[] titulos = {"Teoria", "Autor", "Fecha", "Ciencia", "Id"};
     
        private JMenuBar barra;
        private JMenu archivo, edicion;
        private JMenuItem salir, buscar, modificar, eliminar, seleccionar;
        private DefaultTableModel dtm = new DefaultTableModel();
        private JTable tabla = new JTable(dtm);
        private JScrollPane scroll = new JScrollPane(tabla);
     
        private List<Integer> lista = new ArrayList<Integer>(); 
        conexion cn = new conexion();
     
        public teoriasDatos(){
            super("Teorias System");
            this.setLayout(null);
            this.setSize(900, 460);
            this.setResizable(false);
            this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
            this.Objetos();
            this.setVisible(true);
        }
     
     
     
        public void Objetos(){
            barra = new JMenuBar();
            archivo = new JMenu("Archivo");
            edicion = new JMenu("Edicion");
            buscar = new JMenuItem("Buscar");
            modificar = new JMenuItem("Modificar");
            eliminar = new JMenuItem("Eliminar");
            seleccionar = new JMenuItem("Seleccionar");
            salir = new JMenuItem("Salir");
            barra.add(archivo);
            barra.add(edicion);
            archivo.add(salir);
            edicion.add(buscar);
            edicion.add(modificar);
            edicion.add(eliminar);
            edicion.addSeparator();
            edicion.add(seleccionar);
            this.setJMenuBar(barra);
     
     
     
     
            dtm.setColumnIdentifiers(titulos);
            lista.clear();
     
            try{
                 ResultSet aux = cn.getSt().executeQuery("SELECT*FROM datos");
                 while(aux.next()){
     
                     Object [] fila = {aux.getObject(1), aux.getObject(2), aux.getObject(3), 
                         aux.getObject(4), aux.getObject(5)};
                     lista.add((Integer)aux.getObject(5));
                     dtm.addRow(fila);
     
                 }
     
            }catch(SQLException ioe){
          JOptionPane.showMessageDialog(null, "Error al leer teorias: " + ioe);
            }
     
     
            scroll.setBounds(0, 0, 900, 460);
            this.add(scroll);
     
            salir.addActionListener(this);
            buscar.addActionListener(this);
            modificar.addActionListener(this);
            eliminar.addActionListener(this);
            seleccionar.addActionListener(this);
            dtm.addTableModelListener(tabla);
     
     
     
        }
        public void actionPerformed(ActionEvent e) {
            if(e.getSource()==buscar){
                try{
                    int i = Integer.parseInt(JOptionPane.showInputDialog("ID de la teoria a buscar"));
                    ResultSet resultado = cn.buscar(i);
                    tabla.changeSelection(i-1, i, false, false);
     
                }catch(Exception ioe){
                    JOptionPane.showMessageDialog(null, "Deber un introducir el ID " +ioe);
                }
            }else if(e.getSource() == modificar){
     
                try{
                    int i = Integer.parseInt(JOptionPane.showInputDialog("ID de la teoria a modificar"));
                    ResultSet resultado = cn.buscar(i);
                    if(resultado.next()){
                        String au = JOptionPane.showInputDialog("Autor");
                        String an = JOptionPane.showInputDialog("Aņo");
                        String cie = JOptionPane.showInputDialog("Ciencia");
     
                        if(au.isEmpty()){
                            JOptionPane.showMessageDialog(null, "Debes rellenar todos los campos");
     
                        }else if(an.isEmpty()){
                            JOptionPane.showMessageDialog(null, "Debes rellenar todos los campos");
                        }else if(cie.isEmpty()){
                            JOptionPane.showMessageDialog(null, "Debes rellenar todos los campos");
                        }else{
                          cn.modificar(i, au, an, cie);
     
                        }
                    }
                }catch(Exception ioe){
                    JOptionPane.showMessageDialog(null, "Error al modificar datos: " +ioe);
                }
     
     
            }else if(e.getSource() == eliminar){
                this.delectRows(tabla.getSelectedRows());
                tabla.clearSelection();
     
            }else if(e.getSource() == seleccionar){
                tabla.selectAll();
            }
     
        }
     
        public void delectRows(int[] rowSelected){
            for (int i = 0; i<rowSelected.length; i++){
                String query = "DELETE FROM datos WHERE IDE="+lista.get(rowSelected[i]);
                try{
                    cn.getSt().executeUpdate(query);
                }catch(SQLException sqle){
                    JOptionPane.showMessageDialog(null, "Error al eliminar teoria " +sqle);
                }
            }
        }
     
     
        public void tableChanged(TableModelEvent tme) {
     
        }
     
    }


  2. #2

    Default Re: Refreshing JTable!!

    You should update the default table model. I don't see where you do that in your code.

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