拆分时间java (gui)和显示

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TimeSplitterGUI extends JFrame {
    private JTextField startTimeField;
    private JTextField endTimeField;
    private JLabel yearLabel;
    private JLabel monthLabel;
    private JLabel dayLabel;
    private JLabel hourLabel;
    private JLabel minuteLabel;
    private JLabel secondLabel;

    public TimeSplitterGUI() {
        setTitle("Time Splitter");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new GridLayout(4, 2));

        JLabel startTimeLabel = new JLabel("Start Time:");
        startTimeField = new JTextField();
        JLabel endTimeLabel = new JLabel("End Time:");
        endTimeField = new JTextField();
        yearLabel = new JLabel();
        monthLabel = new JLabel();
        dayLabel = new JLabel();
        hourLabel = new JLabel();
        minuteLabel = new JLabel();
        secondLabel = new JLabel();

        JButton splitButton = new JButton("Split");
        splitButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                splitTime();
            }
        });

        add(startTimeLabel);
        add(startTimeField);
        add(endTimeLabel);
        add(endTimeField);
        add(new JLabel("Year:"));
        add(yearLabel);
        add(new JLabel("Month:"));
        add(monthLabel);
        add(new JLabel("Day:"));
        add(dayLabel);
        add(new JLabel("Hour:"));
        add(hourLabel);
        add(new JLabel("Minute:"));
        add(minuteLabel);
        add(new JLabel("Second:"));
        add(secondLabel);
        add(splitButton);

        pack();
        setVisible(true);
    }

    private void splitTime() {
        String startTimeStr = startTimeField.getText();
        String endTimeStr = endTimeField.getText();

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date startTime = format.parse(startTimeStr);
            Date endTime = format.parse(endTimeStr);

            long duration = endTime.getTime() - startTime.getTime();

            long seconds = duration / 1000;
            long minutes = seconds / 60;
            long hours = minutes / 60;
            long days = hours / 24;
            long months = days / 30;
            long years = months / 12;

            yearLabel.setText(String.valueOf(years));
            monthLabel.setText(String.valueOf(months));
            dayLabel.setText(String.valueOf(days));
            hourLabel.setText(String.valueOf(hours));
            minuteLabel.setText(String.valueOf(minutes));
            secondLabel.setText(String.valueOf(seconds));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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