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Editorial Team
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Asked: 2026-06-14T09:31:19+00:00

Let’s suppose we have a JFrame called FrmRegistration . Its function is inserting data

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Let’s suppose we have a JFrame called FrmRegistration. Its function is inserting data into a table called records.

MySQL’s command desc records would result the following:

+-----------+--------------+------+-----+---------+-------+
| Field     | Type         | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+-------+
| id        | varchar(7)   | NO   | PRI |         |       | 
| name      | varchar(100) | NO   |     | NULL    |       | 
| birthday  | date         | NO   |     | NULL    |       |
+-----------+--------------+------+-----+---------+-------+

Within FrmRegistration there’s a JFormattedTextField for birthday input we’ll call ftfBirthday. In Netbeans, we put names into components by right-clicking it and going to Properties -> Code tab -> Variable name. Or right-click -> Customize code -> Rename… button.

Right-click the field and go to Properties, then in FormatterFactory, click the “…” button. Create a customized field with: ####/##/##

The reason for a JFormattedTextField is that the user wouldn’t lose time by typing the slashes. They appear automatically.

What should be done in the source-code of a button in FrmRegistration called Insert?

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1 Answer

  1. Editorial Team

    Before going to the source-code, right-click the date field and go to Properties. Copy the content of text. It should be (a = one space):

    aaaa/aa/aa

    It will be used in the “} else if (” / / “.equals(birthday)) {” line.

    (See the code for proper parameter)

    I added some things extra, like checking if fields are empty.

        try {
                Class.forName("com.mysql.jdbc.Driver");

                try (Connection con = DriverManager.getConnection(

                                "jdbc:mysql://localhost/database_name_here",
                                "username_here", "password_here")) {

                    String if = txtId.getText();
                    String name = txtName.getText();
                    String birthday = ftfBirthday.getText();

                    PreparedStatement stmt = con.prepareStatement(

                            "INSERT INTO records "
                            + "(id, name, birthday)"
                            + "VALUES(?,?,STR_TO_DATE(?,'%Y/%m/%d'))");

                    if (id.isEmpty()) {
                        JOptionPane.showMessageDialog(null,
                                "The ID field must be completed!");

                    } else if (name.isEmpty()) {
                        JOptionPane.showMessageDialog(null,
                                "The Name field must be completed!");

                    } else if ("    /  /  ".equals(birthday)) {
                        JOptionPane.showMessageDialog(null,
                                "The Birthday field must be completed!");

                    } else {

                        stmt.setString(1, id);
                        stmt.setString(2, name);
                        stmt.setString(3, birthday);

                        stmt.executeUpdate();

                        JOptionPane.showMessageDialog(this, " Data was saved successfully! ");

                    }

                }

            } catch (SQLException e) {
                JOptionPane.showMessageDialog(this, "SQL command error "
                        + e.getMessage());

            } catch (ClassNotFoundException e) {
                JOptionPane.showMessageDialog(this,
                        " Database driver not found ");

        }

    That’s it. Hope it helps someone! 🙂

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