Can other methods make use of JScrollPane's viewport?

Question

It seems like the only way to display text with multiple styles in a text area is to use a JEditorPane. To explore this, I wrote a small app to list all the fonts in their font.

Everything works, and the list is displayed in a JEditorPane, which is inside a JScrollPane.

However, it takes a few seconds to launch and to repopulate, because it generates the entire new list before displaying it. The code is below, following MCV. Minimalizing it to just the message and text made less work so the lag is no longer nearly as noticeable, but my question (below) was more about rendering and keeping track of JScrollPane's position anyway than about this app.

FontFrame.java

public class FontFrame extends JFrame {
    private FontFrame() {
        JFrame frame = new JFrame("Fonts Displayer");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        FontPanel fontPanel = new FontPanel();
        frame.getContentPane().add(fontPanel);
        frame.getRootPane().setDefaultButton(fontPanel.getDefaultButton());

        frame.setMinimumSize(new Dimension(600, 600));
        frame.setPreferredSize(new Dimension(1000, 700));
        frame.pack();
        frame.setVisible(true);
    }


    public static FontFrame launchFontFrame() {
        return new FontFrame();
    }

    public static void main(String[] args) {
        FontFrame.launchFontFrame();
    }
}

FontPanel.java

class FontPanel extends JPanel {
    private String message = "ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz";

    private JEditorPane fontPane;
    private JTextField messageInput;
    private JButton changeButton;

    protected FontPanel() {
        buildPanel();
    }

    private void buildPanel() {
        setLayout(new BorderLayout());

        // Build message input panel
        JPanel inputPanel = new JPanel();
        messageInput = new JTextField(message);
        messageInput.setFont(new Font("SansSerif", Font.PLAIN, 14));
        messageInput.setColumns(40);

        JLabel messageLabel = new JLabel("Message:");

        changeButton = new JButton("Change");
        changeButton.addActionListener((ActionEvent e) -> {
            String text = messageInput.getText();
            if (!text.isEmpty() && !text.equals(message)) {
                message = text;
                refreshFontList();
            }
        });

        inputPanel.add(messageLabel);
        inputPanel.add(messageInput);
        inputPanel.add(changeButton);


        // Build scrolling text pane for fonts display
        fontPane = new JEditorPane();
        fontPane.setContentType("text/html");
        fontPane.setEditable(false);
        fontPane.setVisible(true);
        JScrollPane scrollPane = new JScrollPane(fontPane);
        refreshFontList();

        // Add components to main panel
        add(inputPanel, BorderLayout.NORTH);
        add(scrollPane, BorderLayout.CENTER);
    }


    private void refreshFontList() {
        String[] list = GraphicsEnvironment.getLocalGraphicsEnvironment()
                                                .getAvailableFontFamilyNames();
        StringBuilder messages = new StringBuilder();

        // Set global table style settings
        messages.append("<table>");

        // Make a row for each font
        for (String font : list) {
            messages.append("<tr>");

            //Append data cells
            messages.append("<td>").append(font).append("</td>")
                    .append("<td style=\"font-family:").append(font).append("\">")
                        .append(message)
                    .append("</td>");

            messages.append("</tr>");
        }

        messages.append("</table>");

        fontPane.setText(messages.toString());
    }

    JButton getDefaultButton() {
        return changeButton;
    }
}

Is there any way of redoing refreshFontList so it can generate only what fontPane would show in its viewport first, possibly by using JScrollBar, and then generate the rest of the list right after so the computation time doesn't cause lag in display? Is there a different component that would work better?