Update method

private void updateData()
    {
        String tNama = txtNama.getText();
        String tIc = txtIC.getText();
        String tPend = txtPend.getText();
        String tJabatan = (String)cboJabatan.getSelectedItem();
        String tNamaB = txtNamaB.getText();
        String tISBN = txtISBN.getText();
        String tPinjam = txtPinjam.getText();
        String tHantar = txtHantar.getText();

        try
        {
            String message = "Update Data ini?";
            int baris = JOptionPane.showConfirmDialog(null, message, "Anda Ingin Kemaskini Data Ini???", JOptionPane.YES_NO_OPTION);
            if(baris ==0)
            {
                String sql = "Update peminjam set nama='"+tNama+"',ic='"+tIc+"',no_pend='"+tPend+"',jabatan='"+tJabatan+"',nama_buku='"+tNamaB+"',isbn='"+tISBN+"',T_pinjam='"+tPinjam+"',T_hantar='"+tHantar+"'";
                Stm.executeUpdate(sql);
                Stm.close();
                JOptionPane.showMessageDialog(null, "Data telah dikemaskini");
                kosong();
                bacaData();
                setButang(true);
            }
            kosong();
            setButang(true);
        }
        catch(SQLException e)
        {
            JOptionPane.showMessageDialog(null, e);
        }
    }