J have two classes, listed below, one is table model, and second show data from database in JTable, and it's OK, but after adding a row into database table does't update. How update JTable after adding a row into database?

package djilepak.javaclss.for_table;

/** Class which creates table model */

import javax.swing.JTable; import javax.swing.table.AbstractTableModel;

public class ModelDataTabele extends AbstractTableModel { private String[] columnNames; private Object[][] data; private boolean edittable, changedata;

public ModelDataTabele(String[] naziviKolona, Object[][] podaci) {
    columnNames = naziviKolona;
    data = podaci;
    edit_table = tedit;
    change_data = dchange;
}

public void tableChanged() {
    fireTableDataChanged();
}

public int getColumnCount() {
    return columnNames.length;
}

public int getRowCount() {
    return data.length;
}

public String getColumnName(int col) {
    return columnNames[col];
}

public Object getValueAt(int row, int col) {
    return data[row][col];
}

public Class getColumnClass(int c) {
    return getValueAt(0, c).getClass();
}

public boolean isCellEditable(int row, int col) {
    if (col < 2) {
        return false;
    } else {
        return true;
    }
}

public void setValueAt(Object value, int row, int col) {
    data[row][col] = value;
    fireTableCellUpdated(row, col);
}

public void insertRow(int row, Object[] npodaci) {
    for(int i = 0; i < npodaci.length; i++) {
        data[row][i] = npodaci[i];
    }
}

}

// Form which shows data in JTable from database

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.AbstractTableModel; import javax.swing.table.TableColumn; import javax.swing.event.*; import java.sql.*;

import djilepak.javaclss.for_screen.*; import djilepak.javaclss.for_table.*; import djilepak.javaclss.for_mysql.*;

public class DodajDlg extends JDialog implements ActionListener, FocusListener, KeyListener {

JPanel gornjiPanel = new JPanel();
JPanel centralniPanel = new JPanel();
JPanel donjiPanel = new JPanel();
JScrollPane zaTabelu;
JLabel lblAutor = new JLabel("IME I PREZIME AUTORA: ");
JTextField txtAutor = new JTextField(100);
JButton btnPotvrdi = new JButton("Potrdi");
JButton btnOdustani = new JButton("Odustani");
JTable tabela;
ModelDataTabele mdt;
TableColumn kolona;
ConnectMySQL vezaDB;
Connection Konekcija;
Statement sqlKomanda;
String upit;
ResultSet rs;
String[] nazivi;
Object[][] podaci;
private static int dodajsta;
boolean odustani = false;
static String[] parametri_vb;
int[] wih;

int rb, idna;
String naziva;

public DodajDlg(String naslov, int stasedodaje, String[] parametri_veze) {

    dodajsta = stasedodaje;
    parametri_vb = parametri_veze;

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    setTitle(naslov);

    int w = 0, h =0, koeficijent_w = 100, koeficijent_h = 100;
    PutFrameTo width_height  = new PutFrameTo(w, h);
    wih = width_height.Scr_WH();
    switch (dodajsta) {
        case 1:
        case 2:
            koeficijent_w = 95;
            koeficijent_h = 95;
            break;
    }
    w = (wih[0] / 100) * koeficijent_w;
    h = (wih[1] / 100) * koeficijent_h;
    setSize(w, h);

    PutFrameTo pozicija = new PutFrameTo(w, h);
    int[] xiy = pozicija.XY_Pos();

    setResizable(false);
    setLocation(xiy[0], xiy[1]);
    setModal(true);

    gornjiPanel.setBackground(Color.lightGray);
    switch (dodajsta) {
        case 1:

            break;
        case 2:
            this.formaAutor();
            break;
    }
    add(gornjiPanel, BorderLayout.NORTH);

    btnPotvrdi.setMnemonic(KeyEvent.VK_P);
    btnPotvrdi.setEnabled(false);
    btnOdustani.setMnemonic(KeyEvent.VK_O);
    btnOdustani.setEnabled(true);

    btnPotvrdi.addActionListener(this);
    btnPotvrdi.addFocusListener(this);
    btnPotvrdi.addKeyListener(this);
    btnOdustani.addActionListener(this);
    btnOdustani.addFocusListener(this);
    btnOdustani.addKeyListener(this);

    centralniPanel.setBackground(Color.lightGray);
    centralniPanel.add(btnPotvrdi);
    centralniPanel.add(btnOdustani);
    add(centralniPanel, BorderLayout.CENTER);

    napraviTabelu();

    donjiPanel.setBackground(Color.darkGray);
    zaDonjiPanel();
    add(donjiPanel, BorderLayout.SOUTH);

    setVisible(true);
}

public void napraviTabelu() {
    switch (dodajsta) {
        case 1:

            break;
        case 2:
            int sirinaID = (wih[0] / 100) * 10;
            int brslogova = brojSlogova();
            nazivi = new String[3];
            nazivi[0] = "RB";
            nazivi[1] = "ID";
            nazivi[2] = "Autor";
            if (brslogova == 0) {
                podaci = new Object[1][3];
                podaci[0][0] = 1;
                podaci[0][1] = 0;
                podaci[0][2] = "";
            } else {
                podaci = new Object[brslogova][3];
                procitajPodatke();
            }
            mdt = new ModelDataTabele(nazivi, podaci);
            tabela = new JTable(mdt);
            for (int j = 0; j < tabela.getColumnCount(); j++) {
                kolona = tabela.getColumnModel().getColumn(j);
                if (j == 0) {
                    kolona.setPreferredWidth(50);
                } else if (j == 1) {
                    kolona.setPreferredWidth(sirinaID);
                } else {
                    kolona.setPreferredWidth(wih[0] - (sirinaID + 50));
                }
            }
            break;
    }
}

private void formaAutor() {

    txtAutor.setToolTipText("Upisati IME i PREZIME autora");
    txtAutor.addKeyListener(this);

    gornjiPanel.add(lblAutor);
    gornjiPanel.add(txtAutor);
}

public void actionPerformed(ActionEvent event) {
    Object akter = event.getSource();
    if (akter == btnOdustani) {
        dispose();
    }

    if (akter == btnPotvrdi) {
        pozoviUpis();
        napraviTabelu();

    }

}

private void zaDonjiPanel() {
    int sirina = 0;
    int visina = 0;

    switch (dodajsta) {
        case 1:

            break;
        case 2:
            sirina = (wih[0] / 100) * 93;
            visina = (wih[1] / 100) * 75;
            break;
    }
    Font zaglavljeFont = new Font("DialogInput", Font.BOLD, 15);
    tabela.getTableHeader().setFont(zaglavljeFont);
    zaTabelu = new JScrollPane(tabela);
    zaTabelu.setPreferredSize(new Dimension(sirina, visina));
    tabela.setFillsViewportHeight(true);
    tabela.setSelectionForeground(Color.white);
    tabela.setSelectionBackground(Color.blue);
    tabela.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    donjiPanel.add(zaTabelu);
}

private int brojSlogova() {
    int brojsl = 0;
    if (poveziSeSaBazom()) {
        switch (dodajsta) {
            case 1:

                break;
            case 2:
                try {
                    sqlKomanda = Konekcija.createStatement();
                    upit = "select count(*) from autor";
                    rs = null;
                    rs = sqlKomanda.executeQuery(upit);
                    if (rs != null) {
                        rs.next();
                        brojsl = rs.getInt(1);
                    }
                    rs.close();
                    sqlKomanda.close();
                } catch (SQLException esql) {
                    String poruka = "Gre\u0161ka: " + esql.toString() + "\n" + esql.getMessage();
                    JOptionPane.showMessageDialog(null, poruka, "Gre\u0161ka", JOptionPane.WARNING_MESSAGE);
                }
                vezaDB.prekiniVezuSaBazom(Konekcija);
                break;
        }
    }
    return brojsl;
}

private void pozoviUpis() {
    if (poveziSeSaBazom()) {
        upisiUBazu();
        vezaDB.prekiniVezuSaBazom(Konekcija);
    }else {
        JOptionPane.showMessageDialog(null, "PODACI NISU UPISANI!", "Gre\u0161ka", JOptionPane.WARNING_MESSAGE);
    }
}

private boolean poveziSeSaBazom() {
    vezaDB = new ConnectMySQL();
    Konekcija = vezaDB.konekcijaSaBazom(parametri_vb[0], parametri_vb[1], parametri_vb[2], parametri_vb[3]);
    if (Konekcija != null) {
        return true;
    } else {
        return false;
    }
}

private void upisiUBazu() {
    switch (dodajsta) {
        case 1:

            break;
        case 2:
            try {
                sqlKomanda = Konekcija.createStatement();
                upit = "insert into autor(ida, autor) values(?,?)";
                PreparedStatement upisi = Konekcija.prepareStatement(upit);
                upisi.setInt(1, 0);
                upisi.setString(2,  txtAutor.getText());
                upisi.executeUpdate();
                upisi.close();
                sqlKomanda.close();
            } catch (SQLException esql) {
                String poruka = "Gre\u0161ka: " + esql.toString() + "\n" + esql.getMessage();
                JOptionPane.showMessageDialog(null, poruka, "Gre\u0161ka", JOptionPane.WARNING_MESSAGE);
            }
            txtAutor.setText("");
            break;
    }
    btnPotvrdi.setEnabled(false);
}

private void procitajPodatke() {
    if (poveziSeSaBazom()) {
        switch (dodajsta) {
            case 1:

                break;
            case 2:
                try {
                    sqlKomanda = Konekcija.createStatement();
                    upit = "select ida, autor from autor order by autor";
                    rs = null;
                    rs = sqlKomanda.executeQuery(upit);
                    if (rs != null) {
                        int i = 0;
                        while (rs.next()) {
                            podaci[i][0] = i + 1;
                            podaci[i][1] = rs.getInt("ida");
                            podaci[i][2] = rs.getString("autor");
                            i++;
                        }
                    }
                    rs.close();
                    sqlKomanda.close();
                } catch (SQLException esql) {
                    String poruka = "Gre\u0161ka: " + esql.toString() + "\n" + esql.getMessage();
                    JOptionPane.showMessageDialog(null, poruka, "Gre\u0161ka", JOptionPane.WARNING_MESSAGE);
                }
                vezaDB.prekiniVezuSaBazom(Konekcija);
                break;
        }
    }
}

}