如何在JList中更改模型显示

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

public class CustomListModel extends AbstractListModel<String> {
    private ArrayList<String> data;

    public CustomListModel() {
        data = new ArrayList<>();
    }

    public void addElement(String element) {
        data.add(element);
        int index = data.size() - 1;
        fireIntervalAdded(this, index, index);
    }

    public void removeElement(int index) {
        data.remove(index);
        fireIntervalRemoved(this, index, index);
    }

    @Override
    public int getSize() {
        return data.size();
    }

    @Override
    public String getElementAt(int index) {
        return data.get(index);
    }
}

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

        CustomListModel model = new CustomListModel();
        JList<String> list = new JList<>(model);

        JButton addButton = new JButton("Add");
        addButton.addActionListener(e -> {
            String input = JOptionPane.showInputDialog("Enter an element:");
            if (input != null && !input.isEmpty()) {
                model.addElement(input);
            }
        });

        JButton removeButton = new JButton("Remove");
        removeButton.addActionListener(e -> {
            int selectedIndex = list.getSelectedIndex();
            if (selectedIndex != -1) {
                model.removeElement(selectedIndex);
            }
        });

        JPanel panel = new JPanel();
        panel.add(addButton);
        panel.add(removeButton);

        frame.getContentPane().add(new JScrollPane(list));
        frame.getContentPane().add(panel, BorderLayout.SOUTH);
        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}