java-获取所选列表项的值

我怎样才能得到清单的价值?

这是我的两个列表,从列表中选择这两个值(如标记的)后,我想在代码中的这个位置将这两个元素(字符串)插入数据库:

                PreparedStatement pst = con.prepareStatement(query);

                pst.setString(1, txtFieldName.getText());
                pst.setString(2, txtFieldNumber.getText());
            //  pst.setString(3, listDay.);

在最后一个位置,我想选择用户在ui-two列表中选择的值:

JButton btnNewButton_2 = new JButton("Speichern"); btnNewButton_2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {
try { java.sql.Connection con = DriverManager.getConnection ("jdbc:mysql://localhost:3306/dblabor","root",""); String query = "INSERT INTO Teach(Prof,Laborname,Room,Day,Time) VALUES(?,?,?,?,?)"; PreparedStatement pst = con.prepareStatement(query);

                pst.setString(1, txtFieldName.getText());
                pst.setString(2, txtFieldLaborname.getText());
                pst.setInt(3, Integer.parseInt(txtFieldRoom.getText()));
                pst.setString(4, (String) listDay.getSelectedValue());
                pst.setString(5, (String) listTime.getSelectedValue());
                pst.execute();
                pst.close();


                JOptionPane.showMessageDialog(null, "Succssesfull");


            }

            catch(Exception e1) {

                JOptionPane.showMessageDialog(null, "Wrong");


            }

`

提前谢谢大家。