问如何使用JNA获取活动窗口的应用程序名称？

EN

private static final int MAX_TITLE_LENGTH = 1024;

public static void main(String[] args) throws Exception {

    DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
    LocalDateTime now = LocalDateTime.now();
    TimerTask task = new TimerTask() {
        @Override
        public void run() {
            char[] buffer = new char[MAX_TITLE_LENGTH * 2];
            HWND hwnd = User32.INSTANCE.GetForegroundWindow();
            User32.INSTANCE.GetWindowText(hwnd, buffer, MAX_TITLE_LENGTH);
            System.out.println("Active window title: " + Native.toString(buffer));
            try {
                BufferedWriter bw = new BufferedWriter(
                    new FileWriter(
                        new File("C:\\Users\\" + System.getProperty("user.name") + "\\AppData\\Roaming\\system\\useracivity.txt"),
                        true
                    )
                );
                bw.write(Native.toString(buffer) + " TIME WAS " + dtf.format(now));
                bw.newLine();
                bw.close();
            } catch (Exception e) {
            }
        }
    };

    Timer timer = new Timer();
    timer.schedule(task, new Date(), 5000);

}