如何限制JTextField中的字符数？

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

public class TextFieldLimitExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("TextField Limit Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTextField textField = new JTextField();
        ((AbstractDocument) textField.getDocument()).setDocumentFilter(new DocumentFilter() {
            @Override
            public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
                int currentLength = fb.getDocument().getLength();
                int maxLength = 10; // 设置最大字符数为10

                if (currentLength - length + text.length() <= maxLength) {
                    super.replace(fb, offset, length, text, attrs);
                } else {
                    // 超过最大字符数时，不进行替换操作
                    Toolkit.getDefaultToolkit().beep(); // 发出警告声音
                }
            }
        });

        frame.getContentPane().add(textField);
        frame.pack();
        frame.setVisible(true);
    }
}