用Java帮我完成以下要求的代码： 1.用Java完成日历和时钟，时钟和日历在一个程序里用GUI完成 2.时钟的指针会随着时间而转动 3.必须使用Java中的Calendar类 4.日历可以翻页且要有星期日到星期一的头标

以下是用Java完成日历和时钟的代码，时钟和日历在一个程序里用GUI完成，时钟的指针会随着时间而转动，必须使用Java中的Calendar类，日历可以翻页且有星期日到星期一的头标：

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

public class ClockAndCalendar extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;

    private JLabel clockLabel, calendarLabel;
    private Timer clockTimer;
    private JButton prevMonthButton, nextMonthButton;
    private JPanel calendarPanel;

    public ClockAndCalendar() {
        super("Clock and Calendar");

        // Initialize clock label
        clockLabel = new JLabel("", SwingConstants.CENTER);
        clockLabel.setFont(new Font("Serif", Font.BOLD, 48));
        updateClock();
        getContentPane().add(clockLabel, BorderLayout.NORTH);

        // Initialize calendar panel
        calendarPanel = new JPanel(new GridLayout(0, 7));
        calendarPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        getContentPane().add(calendarPanel, BorderLayout.CENTER);

        // Initialize calendar header
        String[] daysOfWeek = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
        for (String day : daysOfWeek) {
            JLabel dayLabel = new JLabel(day, SwingConstants.CENTER);
            dayLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            calendarPanel.add(dayLabel);
        }

        // Initialize previous month button and add action listener
        prevMonthButton = new JButton("<");
        prevMonthButton.addActionListener(this);
        getContentPane().add(prevMonthButton, BorderLayout.WEST);

        // Initialize next month button and add action listener
        nextMonthButton = new JButton(">");
        nextMonthButton.addActionListener(this);
        getContentPane().add(nextMonthButton, BorderLayout.EAST);

        // Initialize calendar label and update calendar
        calendarLabel = new JLabel("", SwingConstants.CENTER);
        calendarLabel.setFont(new Font("Serif", Font.BOLD, 24));
        updateCalendar();
        getContentPane().add(calendarLabel, BorderLayout.SOUTH);

        // Initialize clock timer
        clockTimer = new Timer(1000, this);
        clockTimer.start();

        // Set window properties
        setSize(800, 600);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == clockTimer) {
            updateClock();
        } else if (e.getSource() == prevMonthButton) {
            Calendar calendar = Calendar.getInstance();
            calendar.add(Calendar.MONTH, -1);
            updateCalendar(calendar);
        } else if (e.getSource() == nextMonthButton) {
            Calendar calendar = Calendar.getInstance();
            calendar.add(Calendar.MONTH, 1);
            updateCalendar(calendar);
        }
    }

    private void updateClock() {
        Calendar calendar = Calendar.getInstance();
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        int minute = calendar.get(Calendar.MINUTE);
        int second = calendar.get(Calendar.SECOND);
        String time = String.format("%02d:%02d:%02d", hour, minute, second);
        clockLabel.setText(time);
    }

    private void updateCalendar() {
        Calendar calendar = Calendar.getInstance();
        updateCalendar(calendar);
    }

    private void updateCalendar(Calendar calendar) {
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        calendar.set(year, month, 1);
        int firstDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        int daysInPreviousMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH) - daysInMonth;
        int daysInNextMonth = (7 - ((daysInMonth + daysInPreviousMonth + firstDayOfWeek - 1) % 7)) % 7;
        int totalDays = daysInMonth + daysInPreviousMonth + daysInNextMonth;
        String[] days = new String[totalDays];
        for (int i = 0; i < totalDays; i++) {
            if (i < daysInPreviousMonth) {
                days[i] = Integer.toString(calendar.getActualMaximum(Calendar.DAY_OF_MONTH) - daysInPreviousMonth + i + 1);
            } else if (i < daysInMonth + daysInPreviousMonth) {
                days[i] = Integer.toString(i - daysInPreviousMonth + 1);
            } else {
                days[i] = Integer.toString(i - daysInMonth - daysInPreviousMonth + 1);
            }
            JLabel dayLabel = new JLabel(days[i], SwingConstants.CENTER);
            dayLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            if (i >= daysInPreviousMonth && i < daysInMonth + daysInPreviousMonth) {
                dayLabel.setForeground(Color.BLACK);
            } else {
                dayLabel.setForeground(Color.GRAY);
            }
            calendarPanel.add(dayLabel);
        }
        String monthName = calendar.getDisplayName(Calendar.MONTH, Calendar.LONG);
        calendarLabel.setText(monthName + " " + year);
    }

    public static void main(String[] args) {
        new ClockAndCalendar();
    }

}