如何使多线程swing gui应用程序用两个按钮启动/停止线程

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

public class MultiThreadSwingApp extends JFrame {
    private JButton startButton;
    private JButton stopButton;
    private WorkerThread workerThread;

    public MultiThreadSwingApp() {
        setTitle("Multi-Thread Swing App");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 200);

        JPanel buttonPanel = new JPanel();
        startButton = new JButton("Start");
        stopButton = new JButton("Stop");
        buttonPanel.add(startButton);
        buttonPanel.add(stopButton);

        getContentPane().add(buttonPanel, BorderLayout.CENTER);

        startButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                startButton.setEnabled(false);
                stopButton.setEnabled(true);
                workerThread = new WorkerThread();
                workerThread.execute();
            }
        });

        stopButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                startButton.setEnabled(true);
                stopButton.setEnabled(false);
                workerThread.cancel(true);
            }
        });

        stopButton.setEnabled(false);
    }

    private class WorkerThread extends SwingWorker<Void, Void> {
        @Override
        protected Void doInBackground() throws Exception {
            // 执行耗时操作
            while (!isCancelled()) {
                // 模拟耗时操作
                Thread.sleep(1000);
                System.out.println("Working...");
            }
            return null;
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                MultiThreadSwingApp app = new MultiThreadSwingApp();
                app.setVisible(true);
            }
        });
    }
}