在javax.swing框架中取消长时间任务

import javax.swing.*;

public class CancelTaskExample {
    private static SwingWorker<Void, Void> task;

    public static void main(String[] args) {
        JFrame frame = new JFrame("Cancel Task Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton startButton = new JButton("Start");
        JButton cancelButton = new JButton("Cancel");
        JTextArea textArea = new JTextArea(10, 20);

        startButton.addActionListener(e -> {
            startButton.setEnabled(false);
            cancelButton.setEnabled(true);

            task = new SwingWorker<Void, Void>() {
                @Override
                protected Void doInBackground() throws Exception {
                    for (int i = 1; i <= 10; i++) {
                        if (isCancelled()) {
                            break;
                        }

                        // 模拟长时间任务
                        Thread.sleep(1000);

                        publish(); // 更新Swing组件

                        setProgress(i * 10); // 设置任务进度
                    }

                    return null;
                }

                @Override
                protected void process(java.util.List<Void> chunks) {
                    textArea.append("Task is running...\n");
                }

                @Override
                protected void done() {
                    startButton.setEnabled(true);
                    cancelButton.setEnabled(false);
                    textArea.append("Task is completed.\n");
                }
            };

            task.execute(); // 执行任务
        });

        cancelButton.addActionListener(e -> {
            if (task != null && !task.isDone()) {
                task.cancel(true); // 取消任务
            }
        });
        cancelButton.setEnabled(false);

        JPanel panel = new JPanel();
        panel.add(startButton);
        panel.add(cancelButton);

        frame.getContentPane().add(panel, java.awt.BorderLayout.NORTH);
        frame.getContentPane().add(new JScrollPane(textArea), java.awt.BorderLayout.CENTER);

        frame.pack();
        frame.setVisible(true);
    }
}