处理发生时动态刷新JTextArea？

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class DynamicTextAreaExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Dynamic JTextArea Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 300);

        JTextArea textArea = new JTextArea();
        JButton button = new JButton("Add Text");

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                textArea.append("This is a new line of text.\n");
            }
        });

        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(textArea, BorderLayout.CENTER);
        panel.add(button, BorderLayout.SOUTH);

        frame.getContentPane().add(panel);
        frame.setVisible(true);
    }
}