我想在jtextfield中键入studentid后单击jbutton时在jframe上显示一些students。
学生数据存储在mysql数据库中，studentrolls表包含了以bullId为主键、studentid、bachid为外键的学生信息，fees表包含了以bullId为主键、bachid为外键的过去几年和实际年份的所有学生费用记录。
如果选择了jcheckboxonlythiswearfee，我想在jtextfield上插入studentid并单击jbutton only actual year fee后显示，否则，框架将在jtable和某些jlabel上显示所有费用记录。
我写了这个代码，我没有得到任何错误，但当我运行文件，我得到了所有的学生费用记录，但当我点击jcheckbox只今年的费用没有发生什么我没有得到今年的费用记录。我的代码有什么问题吗？请帮忙。

private void rSButtonIconDsearchstidActionPerformed(java.awt.event.ActionEvent evt) {
    try {
        Date d = new Date();
        int year = d.getYear();
        int currentYear = year + 1900;
        boolean thisyrchecboxisSelected = jCheckBoxonlythisyearfee.isSelected();
        String sqlquerystfeeslist;
        if (thisyrchecboxisSelected) {

            sqlquerystfeeslist = "SELECT * FROM studentrolls, fees WHERE studentrolls.StudentID = ? AND studentrolls.STRollID = fees.STRollID AND studentrolls.BachID = '"
                    + currentYear + "' ORDER BY studentrolls.BachID";
        } else {

            sqlquerystfeeslist = "SELECT * FROM studentrolls, fees WHERE studentrolls.StudentID = ? AND studentrolls.STRollID = fees.STRollID ORDER BY studentrolls.BachID";

        }

        PreparedStatement preparedStatement = con.prepareStatement(sqlquerystfeeslist);
        PreparedStatement pst = con.prepareStatement(sqlquerystfeeslist);

        if (!jTextFieldsearchstid.getText().isEmpty()) {

            preparedStatement.setString(1, jTextFieldsearchstid.getText());
            ResultSet resultSet = preparedStatement.executeQuery();

            DefaultTableModel tblModelfee = (DefaultTableModel) jTablestfeeslist.getModel();
            tblModelfee.setRowCount(0);    // to clear the table before inserting new data

            while (resultSet.next()) {

                int stfeebalenceint;
                int feecostint = Integer.parseInt(resultSet.getString("MontantFrais"));
                int paidamountint = Integer.parseInt(resultSet.getString("MontantPayE"));
                stfeebalenceint = feecostint - paidamountint;

                String feestatus;
                if (stfeebalenceint <= 0) {
                    feestatus = "SOLDE";
                } else {
                    feestatus = "NO SOLDE";
                }

                String scolaryearfee = resultSet.getString("BachID");
                String feetype = resultSet.getString("TypeFrais");
                String feecost = String.valueOf(resultSet.getInt("MontantFrais"));
                String paidamount = String.valueOf(resultSet.getInt("MontantPayE"));
                String stfeebalence = String.valueOf(stfeebalenceint);

                String stfeeslistTableData[] = {scolaryearfee, feetype, feecost, paidamount, stfeebalence, feestatus};
                tblModelfee.addRow(stfeeslistTableData);

                int stTotfeecost = 0;
                for (int i = 0; i < jTablestfeeslist.getRowCount(); i++) {
                    stTotfeecost = stTotfeecost + Integer.parseInt(jTablestfeeslist.getValueAt(i, 2).toString());
                }

                int stTotpaidamount = 0;
                for (int i = 0; i < jTablestfeeslist.getRowCount(); i++) {
                    stTotpaidamount = stTotpaidamount + Integer.parseInt(jTablestfeeslist.getValueAt(i, 3).toString());
                }

                int stTotfeebalence;
                stTotfeebalence = stTotfeecost - stTotpaidamount;

                String stTotfeestatus;
                if (stTotfeebalence <= 0) {
                    stTotfeestatus = "SOLVABLE";
                } else {
                    stTotfeestatus = "INSOLVABLE";
                }

                jLabelstTotfeecost.setText(Integer.toString(stTotfeecost));
                jLabelstTotpaidamount.setText(Integer.toString(stTotpaidamount));
                jLabelstTotfeebalence.setText(Integer.toString(stTotfeebalence));
                jLabelstTotfeestatus.setText(stTotfeestatus);
            }
        } else {
            JOptionPane.showMessageDialog(this, "Veillez taper le matricule d'un eleve svp.");
        }

    } catch (Exception exception) {
        JOptionPane.showMessageDialog(this, "erreur des donnees: " + exception.getMessage());
    }
}