如何删除jtextfield创建的附加行

import javax.swing.*;
import javax.swing.text.*;

public class TextFieldExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("TextField Example");
        JPanel panel = new JPanel();

        JTextField textField = new JTextField(10);
        panel.add(textField);

        JButton deleteButton = new JButton("Delete");
        deleteButton.addActionListener(e -> {
            Document document = textField.getDocument();
            try {
                // 删除最后一行
                int end = document.getLength();
                int start = Utilities.getRowStart(textField, end);
                document.remove(start, end);
            } catch (BadLocationException ex) {
                ex.printStackTrace();
            }
        });
        panel.add(deleteButton);

        frame.add(panel);
        frame.setSize(300, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}