从不同的地方向swing JTextArea发送消息

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

public class SwingTextAreaExample extends JFrame {
    private JTextArea textArea;

    public SwingTextAreaExample() {
        setTitle("Swing JTextArea Example");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        textArea = new JTextArea();
        textArea.setEditable(false);

        JScrollPane scrollPane = new JScrollPane(textArea);
        add(scrollPane, BorderLayout.CENTER);

        JButton button = new JButton("发送消息");
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                sendMessage("按钮点击事件 - 发送消息");
            }
        });
        add(button, BorderLayout.SOUTH);

        setSize(400, 300);
        setVisible(true);
    }

    private void sendMessage(String message) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                textArea.append(message + "\n");
            }
        });
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new SwingTextAreaExample();
            }
        });
    }
}